All of the fittings can be obtained at a local Recreational Vehicle parts retailer. I purchased the pipe and glue at Home Depot.

1. 3" PVC tube cut to any length - longer for extended trips or group use - shorter for individual use. The tube on mine is cut to 13.5" long, creating a unit that is 17.5" long when assembled - made to fit behind the seat in my kayak.
2. End cap adapter (2)
3. Plain End cap (1)
4. End cap with hose attachment threads for cleaning (1)

• Glue the two end cap adapters to the tube using PVC cement.
• Attach end caps by means of the bayonet hooks.

Construction takes about 3 minutes. No tools are needed once the tube is cut to length.

The BLM reports "A 12 inch 'toilet' has functioned for 3 people on a 3 day, 2 night trip without 'over stuffing' the tube. This 'toilet' or 'Torpedo' as some local boaters call it, fits the description of a washable, reusable toilet required of most river permits." Your mileage may vary.

Make "deposit" on a large coffee filter (10"-12") or large paper towel and place in the tube along with toilet paper. (Use a couple small pebbles on the edges to hold the filter down if a breeze is blowing.) Replace end cap.

This system is set up to be cleaned at an RV dump station. To clean the toilet at a dump station, attach a water hose to the end cap with hose threads. Remove the opposite end cap and place the tube upright over the dump station receiving hole. Turn on water to flush unit. Both end caps can be removed for more thorough cleaning if necessary.