How to know when to replace filter housing? Top of filter "rising" when starting?
I've recently noticed the top of my cartridge filter housing slightly "rising" when the filter pump turns on. Haven't paid attention to that before. Is that normal? OK? Does a new filter housing slightly expand when new? Or only when it is old, and time to replace? How long should a cartridge filter housing last? (Mine is about 8.5 years old.)
I've recently noticed the top of my cartridge filter housing slightly "rising" when the filter pump turns on. Haven't paid attention to that before. Is that normal? OK? Does a new filter housing slightly expand when new? Or only when it is old, and time to replace? How long should a cartridge filter housing last? (Mine is about 8.5 years old.)