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  • captive air tank replacement

    We currently have two captive air pressure tanks, one of which needs to be replaced. I would like to know if we would be able to increase our storage capacity by using a stand of 4" plastic 7' tall. The line would run from the well to the air pressure tank, then to the stand of plastic thats run off a manifold with the tops of the 4" capped, similar to a very large air hammer. We have plenty of water off our well and room in the basement for the extra 4" piping. Is a homemade system like this going to give us the extra storage so we don't have to purchase a second new air pressure tank?

  • #2
    the formula for finding the volumn is pi r(squared) times height.
    pi=3.14
    radius=2
    height = 7X12 inches = 84 inches
    3.14 X 4 X 84 to get cubic inches.
    1055.04
    12x12x12= 144 cu in
    1055.04 divided by 144 = 7.33 cu ft
    1 cu ft = 7.481 gal
    7.33 x 7.481 = 54.83573 gallons
    why not just get a flo-tec storage tank that holds 82 gallons and forget both plastic tanks.

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    • #3
      I assume you want all that storage to prevent the pump from coming on so frequently. If not and you want it because of low producing well, you'd be better off spending less money than a new large tank by buying a CSV and using the good tank you have.

      A CSV gives you constant pressure and allows a very small tank to be used.

      If a low producing well, you must realize the more storage you have, the more water must be taken from the well all at once to replace the number of gallons in storage, so you aren't gaining anything.

      So why so much storage?

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