[DQDick]

Running anything thru the hepvo valve usually tears the membrane and you have to replace it. It's usually accessable from the basement and easy to replace. Replacements are available from trailer supply stores and Amazon. If the membrane is still intact use a soft brush to clean and be careful. After that take the plate with the holes out of the shower drain and replace it with a removable screen, also available at most trailer stores and Amazon. You'll be surprised how often you need to clean the screen. For us it's every other day.