Just opened pool four (4) days ago. Hard plumb 14x42 pool and installed Hayward wall skimmer.
....oh and a fountain. (This is how I noticed lower pressure or flow)
Installed two (2) returns. With both returns open the fountain sprayed great. If I closed one (1) return valve the fountain was almost to much....or would spray over pool.
Ok...for the sand filter pump. I installed and backwashed as directions stated. Pressure gauge reads in green or little past the half way mark or I'd say 6-8 psi
Everything as been great until today. I got into pool witb kids and notice a couple tiny metal flakes.......few grass blades....etc. (thought the pool was clean until I got in with a mask....lol)
So I grabbed the vacuum hose and went around and vacuum with just the hose since there wasn't much.
Now...I wished I'd turn the fountain on prior.....but didn't. ..so I can't say for 100% this happend after vacuuming. ...but now when I turn the fountain on ...the spray goes only 1/3 the distances that it used to. The return don't have the pressure or flow. (This is determined by feeling on hand)
So...I spent the last hour searching.....reading. Then went out.....backwashed for 1:40 ...or until water didn't have any more particals in it. Then rinsed.
The results: Same.....same reading on guage and same flow/pressure out of returns and fountain.
I'm puzzled? ???
Also...when I purchased the sand....I asked if it was #20 ....they said it was 20/30
Is or could this be an issue? Because after an 1 1/2 of brain storming. ....this is the only thing I'm not sure of.
Also....Water is crystal clear!!....looks fantastic. ..... ph and clorine is where it needs to be. (Color testing)(I know.....I need a better testing kit)...last year I never had any issues with paper filter and swg and cheap testing kit...just tested ph and clorine about everyday .....but as I re read pool school. ...I trying to figure out the CYA thing and what that's all about. ....
I could really use some help. Done all this plumbing and set up....no worried why pressure or flow is down.
(Remember. ....the flow as been awsome for 4 days now)