Got this one 6 years ago but have not used it in 3 years because I moved to a new house that has a built in. It fills and runs fine but when it goes to pump out the dirty water it has less pressure and does not completely drain. I tried turning the knob back around to get it to drain longer but it tries to drain more but pumps in spurts still leaving water. After further investigation I noticed that while it is draining water is coming out of the sprayer arm also. Looking at the parts it appears my model has a drain valve that includes a diaphragm Part Details - WHIRLPOOL Diaphragm, part number: AP2909483 . Could this have gotten dry rot and not be fully closing during the 3 years of non use, making the pump flow water thou both the drain and the sprayer arm. I so how would I access this and replace it. also can this washer be installed instead of being a portable.

well looked at it some more and I have found that the seal on the top of the funnel in the collector/check valve is no longer round. I believe that allows water to return to the tub when the water should be pumping out. any input would be nice.