The return flow is very low in my in-ground pool

[aylad]

I'm not a cart filter user, so I'm sure others will chime in here with other ideas, but is it possible that the pleats in your filter have collapsed together, in effect making one thick cartridge to pass water through? There are other threads on cartridge failures, which you can search using the google link in my sig (although until your registration is upgraded, you'll have to log out to be able to read the results) that have been posted this season, including some with pics to illustrate what I'm thinking....

there are apparently some Chinese-made filters out there that are not holding up as well as they should be, and it seems like that might be one cause for increased pressure.

By the way, welcome to the forum!


Janet

[PoolDoc]

Leave the cartridge out, and try it. If it's OK with no cartridge, replace the cartridge. If it's NOT OK, with no cartridge, you pretty much know the problem is not the filter.