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Request a Take Home Composting Toilet Barrel Kit

Submit your request for a Take Home Composting Toilet Barrel Kit. Once we receive your request we will confirm your details, estimate a build time (typically 1 month or less), and provide you with payment details. 

Designed, tested, and refined over the years by David Omick, a local southern Arizona expert, the barrel composting tiolet system is practical and cost effective. This toilet design features a series of 55-gallon high-density polyethylene barrels as the collection and composting container. A customized HDPE panel top serves as a removable lid and a seat, vent, and light trap platform. To compliment the barrel composting toilet design a low-cost, practical urine diversion system is included to provide additional nutrients to your plants. Visit our online Resource Library to learn more about the composting toilet barrel kit system.  You may also schedule a visit to our Living Lab and Learning Center if you would like to check out our working model.

In addition to the kit we will review the following with you:

  • siting and installation tips
  • maintenance and troubleshooting tips
  • benefits to you and the community
  • resource links to DIY instructions, suppliers, use and maintenance, and weblinks

If you are potentially interested in purchasing a kit (includes Compost Crank for easy maintenance) to take home please note the following costs:

  • 2 barrel system - $ 755.00 
  • 3 barrel system - $ 815.00

Please note that these systems are currently not listed on Arizona Department of Environmental Quality's (ADEQ) approved composting toilet list, which means you may not be able to currently permit your system for use. WMG has submitted the barrel kit system for product review to be listed. If approved, and if you decide to permit your system then a typical permit may cost from $500 – $1000 with either Pima County Department of Environmental Quality (PDEQ) or Arizona Department of Environmental Quality (ADEQ). Such kits could be permitted by a person without an existing sewer or septic system seeking the E303 general permit, or if a sewer or septic tank exists, under the 108 general permit as authorized by a county.

You Information
How many individuals plan to use the composting toilet full time? The number of users determines the number of recommended barrels. Number of barrels = numbers of users + 1
Where will you locate your composting toilet. Each barrel requires a 2ft by 2ft space + access. If outdoors we strongly recommend providing a shelter that will protect the barrel top from rain and sun. Be sure your shelter is not within property boundary setbacks. Check with your local jurisdiction regarding property setbacks for basic structures (i.e. garden sheds or other).