GL 90 Extra Spare Container

$449.00

Extra Spare container for GL 90 composting toilet. Having an extra spare container increases the use capacity of your GL 90 composting toilet. With spare containers, the service of the GL 90 toilet is easy, fast and clean. The waste turns in to ready mulch inside the spare container.

Please note that any new GL 90 composting toilet packages already include one spare container. Purchasing the extra spare container will add up to your existing number of spare container(s).

available in USA

Available in USA

In stock: 2 pcs

GL 90 Extra Spare Container

GL 90 spare container increases the capacity of GL 90 composting toilet. In seasonal family use, usually one spare container supplied with the basic package is enough. In continuous use, more containers may be needed.  GL 90 system can have unlimited capacity with spare containers. When using the spare container, you don´t have to handle any raw toilet waste. All you need to do, is simply switch a full container with an empty spare, and the full container can be left outside for further composting. By the time all GL 90 composting toilet containers are full, the first one in use should be ready with compost that can be safely used as a fertilizer e.g. in your garden.

Please note that any new GL 90 composting toilet package already includes a single spare container, so if you are buying the GL 90 composting toilet + an extra spare container, you will receive three GL 90 composting toilet containers in total: one container with open lid and two containers with closed lids.

Use of Extra Spare Container

When the active GL 90 container reaches capacity, it is be replaced with an empty spare container, which is then sealed with its own lid. Subsequently, the toilet’s waste shaft lid is attached to the new container, making it ready for use.

GL 90 installation image

Complete decomposition of the waste within the container typically takes 6 to 18 months, varying with local climate conditions and other environmental factors. For optimal composting, it’s advisable to place the full container in a sunny location. Periodically aerating the compost with a garden fork for example can also enhance the process. The container can withstand freezing temperatures without any damage to the composting container itself.

Each new GL 90 composting toilet system includes one spare container. Adding extra spare container to your setup extends the system’s capacity.

Delivery Contents:

  • GL 90 Composting Container
  • Closed Lid
  • Mesh Net Cap
  • Cap

GL 90 Extra Spare Container

GL 90 spare container increases the capacity of GL 90 composting toilet. In seasonal family use, usually one spare container supplied with the basic package is enough. In continuous use, more containers may be needed.  GL 90 system can have unlimited capacity with spare containers. When using the spare container, you don´t have to handle any raw toilet waste. All you need to do, is simply switch a full container with an empty spare, and the full container can be left outside for further composting. By the time all GL 90 composting toilet containers are full, the first one in use should be ready with compost that can be safely used as a fertilizer e.g. in your garden.

Please note that any new GL 90 composting toilet package already includes a single spare container, so if you are buying the GL 90 composting toilet + an extra spare container, you will receive three GL 90 composting toilet containers in total: one container with open lid and two containers with closed lids.

Use of Extra Spare Container

When the active GL 90 container reaches capacity, it is be replaced with an empty spare container, which is then sealed with its own lid. Subsequently, the toilet’s waste shaft lid is attached to the new container, making it ready for use.

GL 90 installation image

Complete decomposition of the waste within the container typically takes 6 to 18 months, varying with local climate conditions and other environmental factors. For optimal composting, it’s advisable to place the full container in a sunny location. Periodically aerating the compost with a garden fork for example can also enhance the process. The container can withstand freezing temperatures without any damage to the composting container itself.

Each new GL 90 composting toilet system includes one spare container. Adding extra spare container to your setup extends the system’s capacity.

Delivery Contents:

  • GL 90 Composting Container
  • Closed Lid
  • Mesh Net Cap
  • Cap

Customer Reviews

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Customer Images

Image #1 from Bill Spikowski
Image #2 from Bill Spikowski
Image #3 from Bill Spikowski
Image #1 from Clayton
Image #1 from Eva R
Image #1 from No Water Needed
Image #2 from No Water Needed
Image #3 from No Water Needed
Image #1 from Melissa Arcadi
Image #2 from Melissa Arcadi
Image #1 from Bill Spikowski

Bill Spikowski

Our GL90 is up and running; we just swapped out the container for the first time. I really love how small the composting container is, and bought an extra container in case it requires removal more often than projected. Our situation had a number of odd wrinkles: ❖ This is an elevated house; the living area including the bathroom is 8' off the ground. The area below the house is unenclosed, so we didn't have typical space constraints. ❖ We were replacing an original "Carousel" compost toilet from the early 1980s, so we had to line the GL90 up with the original chute, and find a way to connect it to the original vent pipe. ❖ One complication is that the old Carousel was destroyed by flooding from Hurricane Milton. It was raised less than a foot above ground, and the roaring floodwaters came up about 3 feet. So wanted the replacement composting container to be elevated as high as possible. My solution was to hang it from the ceiling below the house, to avoid any structure under the container that could get washed away if we get another flood like that (even if the container itself was above the flood level). ❖ Another complication, this one self-inflicted, was that I was also reinstalling the fire sprinkler system and the water heater, both of which were also destroyed by flooding, and needed to be elevated as well -- and for various reasons needed to be in almost the exact location where the toilet needed to go, and needed to be protected from wind-driven rain. I did have a few technical problems with the GL90: ❖ I was aware that the hose and vent fittings on the GL90 were metric, but I hadn't realized that the nominal metric sizes used in Australia are different than nominal metric sizes for hose and pipe made everywhere else in the world! After numerous false starts and then deep research, I finally figured out ways to make everything work -- but that wrinkle alone took this project way beyond the DIY world. Good thing I love a challenge, and have technical and research skills... ❖ We had a serious fly problem shortly after we began using the GL90. I still am not sure exactly why, but I did notice that the lid doesn't fit tightly on the container. The three clamps just aren't enough to keep even marginally fly-proof. My solution has been decidedly low tech: a brick on the lid between each pair of lid clamps. It's also possible that the exhaust fan is too weak; I've purchased a replacement that should move twice as much air. ❖ I still haven't figured out how to keep the toilet seat on straight. It keeps moving off center, and I'm afraid to tighten the connecting screws any further; they don't seem that robust. The brackets hold the toilet to the floor don't seem that robust either, but the toilet has stayed in place, so I don't want to argue with success (and I'm managing to avoid permanently fastening the toilet to the beautiful terra-cotta tile floor in the bathroom).

Image #2 from Bill Spikowski

Bill Spikowski

Our GL90 is up and running; we just swapped out the container for the first time. I really love how small the composting container is, and bought an extra container in case it requires removal more often than projected. Our situation had a number of odd wrinkles: ❖ This is an elevated house; the living area including the bathroom is 8' off the ground. The area below the house is unenclosed, so we didn't have typical space constraints. ❖ We were replacing an original "Carousel" compost toilet from the early 1980s, so we had to line the GL90 up with the original chute, and find a way to connect it to the original vent pipe. ❖ One complication is that the old Carousel was destroyed by flooding from Hurricane Milton. It was raised less than a foot above ground, and the roaring floodwaters came up about 3 feet. So wanted the replacement composting container to be elevated as high as possible. My solution was to hang it from the ceiling below the house, to avoid any structure under the container that could get washed away if we get another flood like that (even if the container itself was above the flood level). ❖ Another complication, this one self-inflicted, was that I was also reinstalling the fire sprinkler system and the water heater, both of which were also destroyed by flooding, and needed to be elevated as well -- and for various reasons needed to be in almost the exact location where the toilet needed to go, and needed to be protected from wind-driven rain. I did have a few technical problems with the GL90: ❖ I was aware that the hose and vent fittings on the GL90 were metric, but I hadn't realized that the nominal metric sizes used in Australia are different than nominal metric sizes for hose and pipe made everywhere else in the world! After numerous false starts and then deep research, I finally figured out ways to make everything work -- but that wrinkle alone took this project way beyond the DIY world. Good thing I love a challenge, and have technical and research skills... ❖ We had a serious fly problem shortly after we began using the GL90. I still am not sure exactly why, but I did notice that the lid doesn't fit tightly on the container. The three clamps just aren't enough to keep even marginally fly-proof. My solution has been decidedly low tech: a brick on the lid between each pair of lid clamps. It's also possible that the exhaust fan is too weak; I've purchased a replacement that should move twice as much air. ❖ I still haven't figured out how to keep the toilet seat on straight. It keeps moving off center, and I'm afraid to tighten the connecting screws any further; they don't seem that robust. The brackets hold the toilet to the floor don't seem that robust either, but the toilet has stayed in place, so I don't want to argue with success (and I'm managing to avoid permanently fastening the toilet to the beautiful terra-cotta tile floor in the bathroom).

Image #3 from Bill Spikowski

Bill Spikowski

Our GL90 is up and running; we just swapped out the container for the first time. I really love how small the composting container is, and bought an extra container in case it requires removal more often than projected. Our situation had a number of odd wrinkles: ❖ This is an elevated house; the living area including the bathroom is 8' off the ground. The area below the house is unenclosed, so we didn't have typical space constraints. ❖ We were replacing an original "Carousel" compost toilet from the early 1980s, so we had to line the GL90 up with the original chute, and find a way to connect it to the original vent pipe. ❖ One complication is that the old Carousel was destroyed by flooding from Hurricane Milton. It was raised less than a foot above ground, and the roaring floodwaters came up about 3 feet. So wanted the replacement composting container to be elevated as high as possible. My solution was to hang it from the ceiling below the house, to avoid any structure under the container that could get washed away if we get another flood like that (even if the container itself was above the flood level). ❖ Another complication, this one self-inflicted, was that I was also reinstalling the fire sprinkler system and the water heater, both of which were also destroyed by flooding, and needed to be elevated as well -- and for various reasons needed to be in almost the exact location where the toilet needed to go, and needed to be protected from wind-driven rain. I did have a few technical problems with the GL90: ❖ I was aware that the hose and vent fittings on the GL90 were metric, but I hadn't realized that the nominal metric sizes used in Australia are different than nominal metric sizes for hose and pipe made everywhere else in the world! After numerous false starts and then deep research, I finally figured out ways to make everything work -- but that wrinkle alone took this project way beyond the DIY world. Good thing I love a challenge, and have technical and research skills... ❖ We had a serious fly problem shortly after we began using the GL90. I still am not sure exactly why, but I did notice that the lid doesn't fit tightly on the container. The three clamps just aren't enough to keep even marginally fly-proof. My solution has been decidedly low tech: a brick on the lid between each pair of lid clamps. It's also possible that the exhaust fan is too weak; I've purchased a replacement that should move twice as much air. ❖ I still haven't figured out how to keep the toilet seat on straight. It keeps moving off center, and I'm afraid to tighten the connecting screws any further; they don't seem that robust. The brackets hold the toilet to the floor don't seem that robust either, but the toilet has stayed in place, so I don't want to argue with success (and I'm managing to avoid permanently fastening the toilet to the beautiful terra-cotta tile floor in the bathroom).

Image #1 from Clayton

Clayton

Could not be more pleased with this composting toilet. Will definitely use again in a future project.

Image #1 from Eva R

Eva R

Enjoying the GL 90 We bought a property with a small cabin on it with a composting toilet. It was terrible! Lots of trouble, stinky etc. So I went on the hunt for a new one and found the GL90. I had my handyman install it. Actually we added a separate room on to the cabin. It turned out really cute. And the GL90 fits right in. Looks sleek and NO TROUBLE and no stink!!

Image #1 from No Water Needed

No Water Needed

A Game Changer We bought a 100 year old cabin with no running water and needed and indoor solution. Wife said she wouldn't stay there until she didn't have to make her way to the privy in the middle of the night. So, after tons of research on all sorts of composting toilet models, we settled on the GL90. Since we are able to access the crawlspace below, it made sense to choose a model that gets the "mixing tub" out of the bathroom and down below. We went with installation option #2 (only seemed appropriate since it is a toilet!).The result is a toilet that looks like a toilet. And, the porcelain pedestal feels just like a traditional toilet. Installation was straightforward and simple with the exception of the plastic tabs that the bowl gets screwed into to lock it in place. Took a few times to get it all lined up and did end up taking the oscillating tool the tabs, but it all came together and is nice a secure. To power the fan, I added a dedicated switch powered outlet so there's never a doubt if the fan is on or not. Mounted the outlet out of the weather underneath the cabin.

Image #2 from No Water Needed

No Water Needed

A Game Changer We bought a 100 year old cabin with no running water and needed and indoor solution. Wife said she wouldn't stay there until she didn't have to make her way to the privy in the middle of the night. So, after tons of research on all sorts of composting toilet models, we settled on the GL90. Since we are able to access the crawlspace below, it made sense to choose a model that gets the "mixing tub" out of the bathroom and down below. We went with installation option #2 (only seemed appropriate since it is a toilet!).The result is a toilet that looks like a toilet. And, the porcelain pedestal feels just like a traditional toilet. Installation was straightforward and simple with the exception of the plastic tabs that the bowl gets screwed into to lock it in place. Took a few times to get it all lined up and did end up taking the oscillating tool the tabs, but it all came together and is nice a secure. To power the fan, I added a dedicated switch powered outlet so there's never a doubt if the fan is on or not. Mounted the outlet out of the weather underneath the cabin.

Image #3 from No Water Needed

No Water Needed

A Game Changer We bought a 100 year old cabin with no running water and needed and indoor solution. Wife said she wouldn't stay there until she didn't have to make her way to the privy in the middle of the night. So, after tons of research on all sorts of composting toilet models, we settled on the GL90. Since we are able to access the crawlspace below, it made sense to choose a model that gets the "mixing tub" out of the bathroom and down below. We went with installation option #2 (only seemed appropriate since it is a toilet!).The result is a toilet that looks like a toilet. And, the porcelain pedestal feels just like a traditional toilet. Installation was straightforward and simple with the exception of the plastic tabs that the bowl gets screwed into to lock it in place. Took a few times to get it all lined up and did end up taking the oscillating tool the tabs, but it all came together and is nice a secure. To power the fan, I added a dedicated switch powered outlet so there's never a doubt if the fan is on or not. Mounted the outlet out of the weather underneath the cabin.

Image #1 from Melissa Arcadi

Melissa Arcadi

Off Grid waterless toilet. We are off grid and wanted a composting toilet so we could use use huminor for our gardens. The installation was very easy and it works great. The toilet looks great in our bathroom, we are still finishing our cabin but we love this composting toilet. I did some research before purchasing and we are definitely not disappointed. Thank you Waterless toilet.

Image #2 from Melissa Arcadi

Melissa Arcadi

Off Grid waterless toilet. We are off grid and wanted a composting toilet so we could use use huminor for our gardens. The installation was very easy and it works great. The toilet looks great in our bathroom, we are still finishing our cabin but we love this composting toilet. I did some research before purchasing and we are definitely not disappointed. Thank you Waterless toilet.

Image #1 from Bill Spikowski
Image #2 from Bill Spikowski
Image #3 from Bill Spikowski
Image #1 from Clayton
Image #1 from Eva R
Image #1 from No Water Needed
Image #2 from No Water Needed
Image #3 from No Water Needed
Image #1 from Melissa Arcadi
Image #2 from Melissa Arcadi
1-5 of 17 reviews
  1. EA

    We are very pleased with the experience of the GL90. Everything was of good quality and mostly easy to install. The porcelain throne is very high quality and looks very nice. There is absolutely no odor. We had to turn off the power to the fan a couple of times, and there was only a faint smell of fresh pine shavings and hemp. We also inadvertently discovered that the hemp shavings are far superior to pine in the absorption factor. We see now that is explained on the website. We are temporarily using a 5 gallon plastic bottle for liquid containment until our leachate system is complete. At first we were using the supplied hemp and had little to no liquid in the bottle. When we ran out of hemp, we used some local pine shavings and noticed the bottle filled up much more quickly. I’m thinking that using hemp will allow the moisture to remain in the pile longer and allow the fan to evaporate more liquids. Hence, making for less emptying of the liquids container until leachate system and filter is installed. It did take a few return trips to town to get the 4 in vent plumbing that I could make work with supplied fittings. I would suggest giving specific instructions and materials for the type of pipe and fittings that will actually work to save people the time and effort. Fernco fittings saved the day. It was more of a challenge than I anticipated with the various 4 in pipe available on the market. AI wasn’t totally accurate either because of the metric to imperial conversion. I’ll post pics in the near future for reference of what worked for me. The other small details of installing the porcelain toilet: the measurements for placing the toilet mounts seemed to be a bit off and I had to screw in at an angle to get it to work. I measured several times. Also, one of the screws that secure the mounts to the floor broke as well as i was driving it in. I found a more stout screw for that. With those small details the system still rates a 5 in our experience. Service and product are exactly what we had hoped for. Thank you Nicholas.

  2. BS

    Our GL90 is up and running; we just swapped out the container for the first time. I really love how small the composting container is, and bought an extra container in case it requires removal more often than projected.

    Our situation had a number of odd wrinkles:

    ❖ This is an elevated house; the living area including the bathroom is 8′ off the ground. The area below the house is unenclosed, so we didn’t have typical space constraints.
    ❖ We were replacing an original “Carousel” compost toilet from the early 1980s, so we had to line the GL90 up with the original chute, and find a way to connect it to the original vent pipe.
    ❖ One complication is that the old Carousel was destroyed by flooding from Hurricane Milton. It was raised less than a foot above ground, and the roaring floodwaters came up about 3 feet. So wanted the replacement composting container to be elevated as high as possible. My solution was to hang it from the ceiling below the house, to avoid any structure under the container that could get washed away if we get another flood like that (even if the container itself was above the flood level).
    ❖ Another complication, this one self-inflicted, was that I was also reinstalling the fire sprinkler system and the water heater, both of which were also destroyed by flooding, and needed to be elevated as well — and for various reasons needed to be in almost the exact location where the toilet needed to go, and needed to be protected from wind-driven rain.

    I did have a few technical problems with the GL90:

    ❖ I was aware that the hose and vent fittings on the GL90 were metric, but I hadn’t realized that the nominal metric sizes used in Australia are different than nominal metric sizes for hose and pipe made everywhere else in the world! After numerous false starts and then deep research, I finally figured out ways to make everything work — but that wrinkle alone took this project way beyond the DIY world. Good thing I love a challenge, and have technical and research skills…
    ❖ We had a serious fly problem shortly after we began using the GL90. I still am not sure exactly why, but I did notice that the lid doesn’t fit tightly on the container. The three clamps just aren’t enough to keep even marginally fly-proof. My solution has been decidedly low tech: a brick on the lid between each pair of lid clamps. It’s also possible that the exhaust fan is too weak; I’ve purchased a replacement that should move twice as much air.
    ❖ I still haven’t figured out how to keep the toilet seat on straight. It keeps moving off center, and I’m afraid to tighten the connecting screws any further; they don’t seem that robust. The brackets hold the toilet to the floor don’t seem that robust either, but the toilet has stayed in place, so I don’t want to argue with success (and I’m managing to avoid permanently fastening the toilet to the beautiful terra-cotta tile floor in the bathroom).

    Image #1 from Bill Spikowski
    Image #2 from Bill Spikowski
    Image #3 from Bill Spikowski
  3. C

    Could not be more pleased with this composting toilet. Will definitely use again in a future project.

    Image #1 from Clayton
  4. M

    I have not purchased yet but I plan to come next summer. I just wanted to give some recognition to your customer service employee Nicholas who answered my call he was very kind patient and helpful to me he was able to help me decide on the gl 90 system for my off grid ranch. Thank you for your help it means a lot

  5. ER

    Enjoying the GL 90 We bought a property with a small cabin on it with a composting toilet. It was terrible! Lots of trouble, stinky etc. So I went on the hunt for a new one and found the GL90. I had my handyman install it. Actually we added a separate room on to the cabin. It turned out really cute. And the GL90 fits right in. Looks sleek and NO TROUBLE and no stink!!

    Image #1 from Eva R

Let our customers speak for us

Frank W Szymanski
Frank W Szymanski
Reviewer
5/5

I have been servicing and installing composting toilets for 17 years at a seasonal cottage community. Recently I installed two of the UD pedestals for a client, I was very impressed with the quality, as was my clients. The toilets are superior to any brand I've encountered, sunmar, envirolet, nature head, all use thin plastic components. These sturdy porcelain like youd fine in a real bathroom and clean better and dont stain like the plastic ones.

Love the ability to move where the waste pipe and exhaust pipe are installed on the unit, it allows for many options when installing so you can optimize the functionality of the unit. Other units you have to compromise constantly because of the hard mounted penetrations.

4 weeks ago
Eric and Lauri
Eric and Lauri
Verified ownerVerified owner
5/5

We are very pleased with the experience of the GL90. Everything was of good quality and mostly easy to install. The porcelain throne is very high quality and looks very nice. There is absolutely no odor. We had to turn off the power to the fan a couple of times, and there was only a faint smell of fresh pine shavings and hemp. We also inadvertently discovered that the hemp shavings are far superior to pine in the absorption factor. We see now that is explained on the website. We are temporarily using a 5 gallon plastic bottle for liquid containment until our leachate system is complete. At first we were using the supplied hemp and had little to no liquid in the bottle. When we ran out of hemp, we used some local pine shavings and noticed the bottle filled up much more quickly. I'm thinking that using hemp will allow the moisture to remain in the pile longer and allow the fan to evaporate more liquids. Hence, making for less emptying of the liquids container until leachate system and filter is installed. It did take a few return trips to town to get the 4 in vent plumbing that I could make work with supplied fittings. I would suggest giving specific instructions and materials for the type of pipe and fittings that will actually work to save people the time and effort. Fernco fittings saved the day. It was more of a challenge than I anticipated with the various 4 in pipe available on the market. AI wasn't totally accurate either because of the metric to imperial conversion. I'll post pics in the near future for reference of what worked for me. The other small details of installing the porcelain toilet: the measurements for placing the toilet mounts seemed to be a bit off and I had to screw in at an angle to get it to work. I measured several times. Also, one of the screws that secure the mounts to the floor broke as well as i was driving it in. I found a more stout screw for that. With those small details the system still rates a 5 in our experience. Service and product are exactly what we had hoped for. Thank you Nicholas.

4 weeks ago
Image #1 from Bill SpikowskiImage #2 from Bill SpikowskiImage #3 from Bill Spikowski
3
Bill Spikowski
Bill Spikowski
Reviewer
5/5

Our GL90 is up and running; we just swapped out the container for the first time. I really love how small the composting container is, and bought an extra container in case it requires removal more often than projected.

Our situation had a number of odd wrinkles:

❖ This is an elevated house; the living area including the bathroom is 8' off the ground. The area below the house is unenclosed, so we didn't have typical space constraints.
❖ We were replacing an original "Carousel" compost toilet from the early 1980s, so we had to line the GL90 up with the original chute, and find a way to connect it to the original vent pipe.
❖ One complication is that the old Carousel was destroyed by flooding from Hurricane Milton. It was raised less than a foot above ground, and the roaring floodwaters came up about 3 feet. So wanted the replacement composting container to be elevated as high as possible. My solution was to hang it from the ceiling below the house, to avoid any structure under the container that could get washed away if we get another flood like that (even if the container itself was above the flood level).
❖ Another complication, this one self-inflicted, was that I was also reinstalling the fire sprinkler system and the water heater, both of which were also destroyed by flooding, and needed to be elevated as well -- and for various reasons needed to be in almost the exact location where the toilet needed to go, and needed to be protected from wind-driven rain.

I did have a few technical problems with the GL90:

❖ I was aware that the hose and vent fittings on the GL90 were metric, but I hadn't realized that the nominal metric sizes used in Australia are different than nominal metric sizes for hose and pipe made everywhere else in the world! After numerous false starts and then deep research, I finally figured out ways to make everything work -- but that wrinkle alone took this project way beyond the DIY world. Good thing I love a challenge, and have technical and research skills...
❖ We had a serious fly problem shortly after we began using the GL90. I still am not sure exactly why, but I did notice that the lid doesn't fit tightly on the container. The three clamps just aren't enough to keep even marginally fly-proof. My solution has been decidedly low tech: a brick on the lid between each pair of lid clamps. It's also possible that the exhaust fan is too weak; I've purchased a replacement that should move twice as much air.
❖ I still haven't figured out how to keep the toilet seat on straight. It keeps moving off center, and I'm afraid to tighten the connecting screws any further; they don't seem that robust. The brackets hold the toilet to the floor don't seem that robust either, but the toilet has stayed in place, so I don't want to argue with success (and I'm managing to avoid permanently fastening the toilet to the beautiful terra-cotta tile floor in the bathroom).

2 months ago
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CF 8 Composting Toilet – Estimated Daily Capacity

The CF 8 is a continuous composting toilet system featuring a single large 250-gallon container. Like the CF 4, it is designed for gradual emptying rather than batch-style use. Solids are typically removed in thirds or sections, allowing earlier deposits time to fully compost inside the tank.

This setup allows for either:


🔁 Continuous Use: Gradual Emptying in Thirds

When used year-round, the CF 8 is typically emptied one-third at a time, effectively composting in three rotating “piles” within the container.

Because the CF 8 is more than twice as large as the CF 4, each pile can hold approximately 480–960 poops, depending on composting conditions and how much bulking material is used.

Service Interval (per pile) Estimated #2 Visits per Day
30 days (1 month) ~17–32 visits/day
60 days (2 months) ~8–16 visits/day
90 days (3 months) ~5–11 visits/day
180 days (6 months) ~3–5 visits/day
365 days (1 year) ~1.2–2.6 visits/day

💡 These figures assume that one-third of the tank is in active use at a time, with older waste given time to compost before removal.


🌤 Seasonal Use: Full-Tank Emptying After Inactive Period

For cabins, cottages, or other sites used seasonally, the CF 8 can be used for a few months and then left idle to allow full composting. In such cases, the entire tank may be emptied once a year.

Full-tank capacity estimate: ~1,440–2,880 poops

Example: 120 days of use (approx. 4 months):
→ ~12–24 solid visits per day on average


⚠️ Disclaimer

These numbers are rough estimates based on typical use and conditions. Actual capacity will vary depending on:

For best performance, ensure proper aeration, regular bulking material use, and consistent emptying of composted portions.


💡 Want to Maximize Capacity? Consider a Urine-Diverting Toilet — With Some Important Considerations

upgrade to a urine diverting toilet pedestal

If you’re looking to maximize the capacity of the CF 8 system — aiming for 960+ poops per composting “pile” — we recommend using a urine-diverting (UD) toilet pedestal.

✅ Benefits of Urine Separation:

By diverting urine out of the solids container, the volume taken up by absorbent material (like peat or wood shavings) is significantly reduced. This can make a big difference in how often the system needs to be emptied.


⚠️ Downsides to Consider:

Urine-diverting toilets can take some time to get used to. Users need to sit or aim correctly to ensure proper separation, which might not happen consistently without experience or guidance.

For this reason, UD toilets are generally not ideal for public or commercial settings where the toilet is used by guests, tourists, or other first-time users. In these cases, misuse can reduce the effectiveness of the system and may even lead to unpleasant maintenance issues.


In short: A UD toilet is an excellent choice for maximizing capacity in private or family use, but for guest or public access composting toilets, a standard non-diverting model may be more practical and user-friendly.

Green Toilet 100 Easy – Estimated Daily Capacity

The Green Toilet 100 Easy is a compact and user-friendly batch composting toilet with a 26-gallon composting container. Its design makes it well-suited for outhouses, cabins, and even indoor use. A spare container is available to expand capacity and simplify servicing.


🔢 Estimated Solid-Waste Capacity per Bin:

Note: Due to the shape and internal structure of the container, the actual composting capacity is slightly lower than its raw volume might suggest, if you compare with Green Toilet 120 Family composting toilet for example.


📆 Average Daily Capacity per Bin

Service Interval Estimated #2 Visits per Day
30 days (1 month) ~6–7 visits/day
60 days (2 months) ~3–4 visits/day
90 days (3 months) ~2.2 visits/day
180 days (6 months) ~1.1 visits/day
365 days (1 year) ~0.5 visits/day

Notes & Recommendations:


⚠️ Disclaimer:
These estimates are intended as general guidance. Real-world performance may vary depending on:

CF 4 Composting Toilet – Estimated Daily Capacity

The CF 4 is a continuous composting toilet system featuring a single large 105-gallon container. Unlike batch composting systems (such as the Green Toilet models), the CF 4 is designed for gradual emptying — solids are typically removed in thirds or sections, allowing earlier deposits time to fully compost inside the tank.

This setup allows for either:


🔁 Continuous Use: Gradual Emptying in Thirds

When used year-round, the CF 4 is typically emptied one-third at a time, effectively composting in three rotating “piles” within the container. Depending on composting conditions and how much bulking material is used, each pile can hold approximately 200–400 poops.

Service Interval (per pile) Estimated #2 Visits per Day
30 days (1 month) ~7–13 visits/day
60 days (2 months) ~3–7 visits/day
90 days (3 months) ~2–4 visits/day
180 days (6 months) ~1–2 visits/day
365 days (1 year) ~0.5–1.1 visits/day

💡 These figures assume that one third of the tank is in active use at a time, with older waste given time to compost before removal.


🌤 Seasonal Use: Full-Tank Emptying After Inactive Period

For cabins, cottages, or other sites used seasonally, the CF 4 can be used for a few months and then left idle to allow full composting. In such cases, the entire tank may be emptied once a year.


⚠️ Disclaimer

These numbers are rough estimates based on typical use and conditions. Actual capacity will vary depending on:

For best performance, ensure proper aeration, regular bulking material use, and consistent emptying of composted portions.


💡 Want to Maximize Capacity? Consider a Urine-Diverting Toilet — With Some Important Considerations

upgrade to a urine diverting toilet pedestal

If you’re looking to maximize the capacity of the CF 4 system — aiming for 400+ poops per composting “pile” — we recommend using a urine-diverting (UD) toilet pedestal.

✅ Benefits of Urine Separation:

By diverting urine out of the solids container, the volume taken up by absorbent material (like peat or wood shavings) is significantly reduced. This can make a noticeable difference in how often the system needs to be emptied.

⚠️ Downsides to Consider:


In short: A UD toilet is an excellent choice for maximizing capacity in private or family use, but for guest or public access composting toilets, a standard non-diverting model may be more practical and user-friendly.

Green Toilet 120 Family

💩 Average Daily Capacity per 31-Gallon Composting Bin

(Based on approx. 356 uses involving a #2 — i.e., poop) – only the solids count!

Service Interval #2 Visits per Day (involving a #2)
30 days (1 month) ~11.9 visits/day
60 days (2 months) ~5.9 visits/day
90 days (3 months) ~4.0 visits/day
180 days (6 months) ~2.0 visits/day
365 days (1 year) ~1.0 visits/day

🟢 What counts as a “#2 visit”?
Only visits that involve pooping (i.e., going number two) — urine-only visits don’t contribute to filling the composting bin and are not included in the estimate.

⚠️ Disclaimer:
These estimates are approximations. The actual number of solid uses per bin may vary significantly depending on climate, temperature, ventilation, user habits, and the amount of dry bulking material (e.g., wood shavings or peat) added after each use.

Green Toilet 330

💩 Average Daily Capacity per 87-Gallon Composting Bin

(Based on approx. 1,000 uses involving a #2 — i.e., poop) – only the solids count!

Service Interval #2 Visits per Day (involving pooping)
30 days (1 month) ~33 visits/day
60 days (2 months) ~17 visits/day
90 days (3 months) ~11 visits/day
180 days (6 months) ~5.6 visits/day
365 days (1 year) ~2.7 visits/day

🟢 What counts as a “#2 visit”?
Only visits that involve defecation (pooping) — urine-only visits don’t fill up the composting bin and are not included in the 1,000-use estimate.

⚠️ Disclaimer:
These estimates are based on typical, steady use. The actual number of solid uses a composting bin can handle may vary significantly depending on climate, temperature, humidity, ventilation, and how much dry bulking material (like wood shavings) is added after each use.

Composting toilet waste pipe extension

💧 Liquid waste (urine) estimate

Average person produces about:

So for 100 people:


🚽 Flush water use estimate

Average flush volume in the U.S. is about:

Average person flushes ~5 times per day, so:

So for 100 people:


✅ Summary in gallons

Type Per person For 100 people
Urine (liquid waste) ≈0.4 gal/day ≈40 gal/day
Flush water (toilet only) ≈7.5 gal/day ≈750 gal/day
Product Image Product Clearance Requirement
CF 4 continuous composting toilet with porcelain pedestal green background CF 4 Continuous composting toilet 13″ (when partially buried)
gl 90 batch composting toilet package GL 90 Batch composting toilet 18″
CF 8 continuous composting toilet with non separating porcelain pedestal blue background CF 8 Continuous composting toilet 18″ (when partially buried)
Rota-Loo 650 Split-system Batch Composting Toilet Rota Loo 650 Batch composting toilet 26″
Green Toilet Lux 120 Composting toilet with spare container package Green Toilet Lux 120 Batch composting toilet 28″
Green Toilet Lux 330 Composting toilet with spare container package Green Toilet Lux 330 Batch composting toilet 37″
Rota Loo 950 batch composting toilet blue background Rota Loo 950 Batch composting toilet 38″

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💬 Live Chat: Start a Chat Now

Our team is always available to assist you during the following hours:

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Holidays: Closed

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Feel free to leave us a message through our contact form or email us at info@waterlesstoiletshop.com.

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Urine Separation in Composting Toilet Article

outhouse next to winter cottage (1)

outhouse next to winter cottage

 

open compost bin outdoors

open back bench-type-of seat
Installation principle of Green Toilet 120 and 330

Green Toilet 120 Family composting toilet installed

Green Toilet 120 Family installed underneath outhouse seat

Green Toilet 330 outhouse inside flat seat

Green Toilet 330 ventilation pipes

Green Toilet features ventilation pipes.

On top of the vent pipe stack here is a Whirlybird

Green Toilet double base from below

Green Toilet’s double base from below

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