Hi - My cartridge filter has some bands that are starting to split but still touching ends at the split. But the top band is all the way broken and the ends are quite far apart (not clear if the filter is really spread out that much or if perhaps part of the band is actually missing).
I also have high psi. Usually when I clean the filter and re-start, psi is at 10 on low and at 20 on high. Until recently it would slowly creep up to 25 on high (maybe a month) and then I'd clean it and start over. Lately it the psi has gone to 25 at a much quicker clip. I thought maybe since my pool is bigger this year it was normal to be getting dirty that much quicker, but each time I cleaned it looked fairly clean to begin with and not much debris was coming off it.
Saturday I cleaned it (only one week since the last time). As expected the psi was back to 20 when I re-started it and I checked it five or six hours later and it was still about 20. Sunday morning it was still close to 20. But by Sunday night, it was at 30.
Does the broken band explain the very fast rise in psi? If not, I'll have to do an OCLT to see if I am fighting something I can't see -- water is clear, chlorine seems to hold appropriately during day, etc. Thanks for any input.