We have a cartridge filter. This is our 7th summer with the pool. We always have PB open and close and they clean the filter. Since my filter is oversized, the pressure has never gone up enough to need a cleaning in the summer before. Well, this time it did. Probably because the filters are now over 6 years old. Since it is 9/14 and our appointment to close the pool is 10/15 (later than what I'd like, but we called late. I'm not letting anyone other than this company that I trust touch my pool.)
Anyway, we decided that we'd better clean the filter. Got a small bore hose nozzle, a new trash can, and a bottle of Dawn. Cleaned a LOT of gunk out of the pleats and then let the filters soak in a solution of 2.5 cups of Dawn, 15 gallons of water. Took the filters out and set about rinsing them.
After 45 minutes of rinsing with soap still coming out, we got cold and tired and decided to pick up where we left off tomorrow. The amount of soap is definitely decreasing, but it's still there.
What's other peoples' experience on how long you need to rinse. Did we do something wrong, or do we just need to keep at it.
I have to say, as a once every 7 years chore, this was kind of fun. Seeing all that gunk in the filter and then getting it out. Except for the lingering soap issue.