Re: Thetford electric PortaPotty doesn't pump
We broke the lid on our manual Porta Potti several years ago and were able to purchase a replacement. When we broke it again (stepping on it to get up to the penthouse*), we discovered that Sears had the entire units on sale cheaper than the cost of the replacement lids. You might check out a new unit, especially now that there might be "end of season" sales.
*The solution was to put non-skid tape on the edge of the seat so that we don't accidentally step on the weaker center of the seat...
'01 Ford EB50p Quigley 4WD