I'm a pool newbie. I've got a 12x20 above ground pool with a brand new 1hp pump & hayward plm100 cartridge filter with a brand new filter cartridge. I have almost no water flow when the filter cartridge is installed.
My local pool company came out & told me I had to replace the pump & replace the filter cartridge, which I did, but with brand new parts I still have the same problem. I don't have much faith in the pool company anymore.
Does anyone have any ideas why or what I can do to fix it? It worked perfectly when we closed the pool last fall.
For what it's worth, the check valve in the bottom of the filter doesn't seem to work. Please help