I am a new pool owner, well relatively new. We bought our dream house just over one year ago. Previous owner gave me a very brief explanation how to run things. Last year he showed me that normal pressure for the filter is around 17psi, and that if I get to around 30psi I should backwash. Worked great last year.
This year when I opened the pool, I have not been able to get the pressure below 27-28psi. After vacuuming it can get up to 40psi or more. (Yikes) The initial chemicals the local pool shop gave me after water analysis worked great, water was crystal clear. Few weeks later water was green and cloudy. I have fought this all summer long, flocking, vacuuming to waste, etc. We try and shock weekly and run the pump 6-7 hours a day. Chlorine is distributed via a inline chlorinator filled with tablets inside the pool shed.
I have wasted hundreds of dollars in chemicals this season and it still looks like ****. My wife found this forum a couple weeks ago and since them I have been reading lots. I am now convinced the BBB method is the way to go. I have a TF-100 test kit on the way to the house and cannot wait to get started treating my pool the correct way. It's time to become educated and stop being at the mercy of the local pool shop and their expensive chemicals.
Now to get to the point of this thread. Correct me if I am wrong, but I feel I should have a proper functioning filter before I even attack the green water. I feel like it is not functioning properly if I cannot get the pressure below where it is at. I was prepared to pay someone to come out and change out the sand until I saw some posts on here saying that sand does not normally have to be changed.
As listed in my signature, I have a Tagelus High Rate sand filter. The sticker on the side does not say the model #, amount of sand, etc. It has the spots for them, but was either not filled out or has worn off over time. There is a sticker on it that says it has the "V" type threading on it used prior to 1991. There are couplers to all the fittings connected to the MPV. My question is how do I take off the top of the filter to inspect and hopefully clean the sand? It looks like the junction where the center tube meets the filter housing is glued on. There are 6 screws around the MPV, do I remove those?
I am hopefully attaching some pictures to show my filter and what I am trying to describe.
Thanks in advance for any help!