Dometic 974 Portable Toilet w/Mounting Brackets -2.6 Gallon - Grey [301097406]974 Portable Toilet with Mounting Brackets 2. 6 Gallon Grey Powerful flushing at the touch of a button sets the new 970 portable toilet series apart from the rest. Requires no manual pumping or batteries, yet delivers a robust bowl clearing flush every time. The 9. 8 L tank, with a tank level indicator, contains enough water for 27 flushes. When it is time to empty it, the extra long discharge pipe is a sure safeguard against mess. Just as convenient