I bought a mobile home in 2006, just recently the Mancesa commode in the master bedroom started giving me problems flushing. I tried adjusting the float in the tank and nothing worked, so I replaced the entire flush valve system with a universal unit, that I was assured would work, well guess again. It will not flush all the way, the water just goes around and around, and goes down slowly, sometimes everything goes down, but it never flushes completely. I can flush it with a pitcher of water, so I know there is no drainage problem. The vent on the roof has been snaked out, along with the commode itself being snaked. I have had the treatment plant pumped out. Does anyone know if it is true that these commodes must have the same brand parts for it to work correctly? If so, where in the world would you find the replacement parts?