Understanding pool plumbing and pool valves. How to . In between our suction pipes and the return pipe are the pool pump and filter, and maybe a heater. May 28, 2015 - This topic is brought up quite often by puzzled pool owners presented with a rat's nest of pipes, elbows, valves and pumps. The state of some . Water enters the valve through the 'PUMP' port and exits back to the pool to your problem, but is I understand you correctly, you have had this problem with . Mar 26, 2016 - Here is a list of common spots for swimming pool leaks and we will . A bad backwash valve can leak water out backwash line into the p trap in the picture. . This is the part of the pool where the pump sucks the water at the . If all the parts inside the filter are in good shape and everything is fine, we will then inspect the backwash valve. Read our article on 'Swimming Pool Filter . The swimming pool pump will pump pool water through the swimming pool filter where . compared to cartridge filters since they don't have backwash valves. Feb 8, 2016 - Learn how important your swimming pool filter is and what to look for . It could be bad filter grid(s), the manifold, the backwash valve piston or orings, etc. . (which turned the heater off 15 min. before the pump would shut off, . Jan 28, 2017 - Read how to prepare and understand pool flooding. . You can drain your pool by turning the pump on and opening up the hose bib valve. Oct 19, 2017 - Pool heaven Inc. is an expert pool service and repair contractor in Orange County, Ca. . This could be a bad grid, manifold, backwash valve piston, etc. . water tight pool equipment, and that the pool pump is turning on and pool . below or type in any swimming pool or spa related topic and click search.