AboutCraig Expertise Residential Pool Systems Only: Filters (DE, Sand and Cartridge), Pumps, Polaris and Letro Pool Cleaners, Plumbing, Algae Removal, Leak detection, Chemical balancing, Renovation, Seasonal opening/closing issues, Custom safety cover installations. I do NOT provide advice on vinyl pool construction or above groud pools.
Experience Owned and operated swimming pool renovation and maintenance company for 10 years before selling it. Currently act as an independent consultant. Education/Credentials: Bachelor of Science degree New York University, Former member of the National Spa and Pool Institute (NSPI).
Question I have pac fab (pentair) 6 position multiport valves for pool and spa. Every time I
backwash they continue to leak to the waste line and I need to reassemble them
in the filter position to stop the leak. The spider valve always appears to be
correctly seated. I have tried new spider gaskets, gluing in the spider gasket,
and even replaced the entire handle unit. Any suggestions? thanks, bob
Answer bob:
This is very common. I try to replace spider gaskets by adhering it onto the base of the valve body with silicon caulk allowing it to dry overnight before reassembling.
It is also a good idea to install a valve on the waste line. Only open the valve when you backwash and then return it to the close position.
The cause of a leaking gasket can be: 1) improper water chemistry. 2) its too old 3) your pump is oversized for your filter. 4) the gasket lifts up. regardless... a new valve will solve this problem.
