last week I noticed water leaking on my table under soclean. couldn't see where it was coming from. I had just changed the filter and check valve plus replaced all black hoses. I had placed a thick towel under it and it was soaking wet. husband said to check out the check valve: he blew on it and he said said it wasnt working right. evidently it was a dud and I replaced it with a new one. hopefully it won't leak now. I'll check it out tommorow. just wanted everyone to know to check the check valve.