I've got a question I'm hoping someone here will be able to help me with.
I've got a 2 speed pump which I'd like to run at the lower speed in order to save on electricity. Unfortunately, I'm finding that it seems that I'm not getting very good water flow rate when using low speed.
I've got a sand filter, and immediately after I do a backwash, the flow improves for a short time, but goes back to being poor within a few days. I've also noticed that if I set the filter to 'recirculate', the flow improves dramatically.
I've read up on the procedure for performing a deep clean of the sand filter, but unfortunately, the way my filter is piped, I can't open it without cutting the pipes, so it's not something I've been able to try yet.
If I were to replace the filter with a cartridge filter, would my water flow improve? I suppose I could have someone change the piping on the sand filter to make it easier to open it up and clean it, but I really prefer the idea of not having to do backwashes anymore.
In general, which type of filter would allow for a higher flow rate at a low pump speed?