Well Filter

Hi there, I need a water filter for my well, which i can hook up before the water riches the pressure tank. I got a lot sediment in the well. I was thinking of a filter like from a fish tank. My Idea is , i fill it with gravel from big to fein (Sand) gravel in at least a 6 inch pipe and about 4 feet long. The pump company ( Flotec) told me that i need a pipe with min. 100psi rating. I want use a clear pipe so i can see when i have to change (clean) the gravel.It should also be mounted in the basement ( freeze protection). I found on the i-net a clear pipe with treats on the top and bottom, but than it's not rated any more for 100 psi. so what can i do. Any clue?

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NachoMahma9 years ago
. Assuming you want 150psig max working pressure rating, then 2-1/2" or less clear PVC Schedule 40 pipe will work. In Sched 80, you can go up to 4". Note: these ratings are at ~72 deg F. At 90 deg F, pressure ratings drop by 25%. . You can put two 4" (Sched 80) pipes in parallel for less restriction.
germanudo (author)  NachoMahma9 years ago
Ok , i understand everything but the 25% drop. Could you explain that a little bit more, may more in detail.
. If a piece of clear PVC pipe has a pressure rating of 100psig, then at 90 degF you need to derate it to 75psig. . For well water, this shouldn't be a problem - unless you are over a geothermal area. Sorry I brought it up.
germanudo (author)  NachoMahma9 years ago
Okidoki, now i got it.
PVC is 25% at 90F
guyfrom7up9 years ago
I wouldn't use it then, if it's not rated, it'd be like trying to... ummm... well anyways it could explode