Hi,

Where the water goes in from the shower there should be no check valve...the water should flow freely into the tank....there is no pressure that will open the valve....

You need to remove the check part or pipe it in somewhere else....
are you sure you did not pipe it into the outlet???

heatman101

Hello Ray. Thanks for choosing Fixya! Your problem is most likely caused by a faulty inlet control flap. Often, a good and thorough cleaning of the inlet control flap is all that is needed. Certain bath shampoos and conditioning products have a tendency to "gum up" the flap preventing it from doing it's job. I am including a link to the installation manual for your product that will show you exactly where and how to get to the inlet control flap and maintain it. Joe

http://www.saniflo.com/pdf/install/BEST_US.pdf

P.S. If your efforts do not solve the problem please contact one of our service engineers by calling Saniflo's head office at 1-800-571-8191.

Did this problem just start? Or is this a new installment?