I have a Sealand Sanipotti portable on our H26 which seems to have developed a problem with the fresh water pump. Does anyone have any ideas on how I can get this puppy pumping again? Last season the thing was working fine. It was stored in the garage through the winter (clean and empty) and now I found that when I try to pump rinse water in it doesn't exit the resevoir. I checked the vent hole, it appears open. I also opened the fill cap and can see the rinse water swirling around but nothing comes out into the bowl. Any ideas on what could cause this? I can't see any blockage in the line but can't see any way to open the thing up for further inspection. The unit is about 6 years old, we've never used any chemicals other than vinegar in it. Thanks, Jim