Water well pressure tank

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Dede, Sep 9, 2020.

  1. Dede

    Dede New Member

    Joined:
    Sep 9, 2020
    Location:
    Lake Charles la
    Hello. So I live in lake Charles la and was recently hit by hurricane Laura. A tree fell on the pvc that connects my tank. And broke the pvc. This is either a weird setup or old setup but I don’t have a tee. So just the pvc broke and the tank fell. A plumber said the tank should still work. My husband can replace the pvc that broke. But we don’t know what to do afterwards about the tank. I’ve seen videos about draining it. I’m not sure what’s that right call. The drain valve is located on the well casing via a tee. Any help would be appreciated
     

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  2. WorthFlorida

    WorthFlorida The wife is still training me.

    Joined:
    Oct 28, 2009
    Occupation:
    Retired
    Location:
    Orlando, Florida
    I'm glad the tree didn't fall on your home. Need better pictures of you pressure tank. There are two kinds, most now have a bladder (like a balloon) and it keeps the water and air separate. The other is the air and water are in one tank. The process is similar but different. For a bladder type tank you need an air compressor or old fashion bicycle pump and a pressure gauge. A bicycle pump can be a bit tough to get the volume of air needed for 38 PSI.
    There are plenty of videos on this topic on Youtube.

    With the pump powered off and to drain water from the tank, open the lowest spigot on your set up. If there isn't one you can easily add one.
     
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  4. Dede

    Dede New Member

    Joined:
    Sep 9, 2020
    Location:
    Lake Charles la
    Thank you do much for you response. This tank is a flex-lite model fl17. The pressure gauge is still connected to the pvc. Or do I need a desperate gauge. So you say I need to drain the water from the tank. And then I have to add air to 38psi? I attached a picture of the tank.
     

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  5. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Water is already drained.

    You have a submersible pump. What psi is your pressure switch set to? If 40/60, then 38 psi for the air is right. If the pressure switch is set to 30/50, then 28 is right for the air.

    Protect your FL17 pressure tank from UV with a cover.
     
  6. Dede

    Dede New Member

    Joined:
    Sep 9, 2020
    Location:
    Lake Charles la
    I looked everywhere for the pressure switch info. The sticker just says max 220 psi. This is a tank installed by home previous owner. How exactly did the water drain? Did it happen when it broke from the pvc? I didn’t manually drain it. Also how do I add the air. From the air valve on top of the tank?
     
  7. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Even if there had been a label, it could have been adjusted. Normally you only turn the nut on the big spring. About 3.5 turns clockwise raised both cut-in and cut-out about 10 psi.

    It came out of the broken pipe from below the diaphragm. If there is water above the diaphragm, the tank is bad.
    Yes, Schrader valve on top for the air. Use a valve cap to seal better. Use a tire pressure gauge. Air may be OK already, or may be a little low and needs some. A "250 psi" electric tire pump would take a long time.

    Note than when repiping, you want the pressure gauge to sense the pressure pretty much the same as the pressure at the input to the pressure tank. If there is going to be a lot of pipe, move the pressure switch to the pressure tank.
     
  8. Dede

    Dede New Member

    Joined:
    Sep 9, 2020
    Location:
    Lake Charles la
    Thank you so much. This has been helpful. I have a few last questions. Do I do 38 psi or 28 psi. Since I don’t know the pressure switch info. And do I add water to the tank or does this happen by itself.
     
  9. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    All by itself.

    See what is there now. If you want, you could pump it up to 38 at the gas station. Then if you later find that was too high, let some air out.

    One symptom of having too much air is a little stutter in air pressure when the pump turns on, plus the capacity is lower. Too little pressure can be harder on the tank. To much pressure is not hard on the tank.

    When the system is normal, the air pressure and water pressure would read about the same. That is useful to compare calibration on your water pressure gauge and your air pressure gauge.
     
  10. Dede

    Dede New Member

    Joined:
    Sep 9, 2020
    Location:
    Lake Charles la
    Hello there. I just wanted to thank you for your help. We were able to install the tank back on and we have water.
     
  11. valveman

    valveman Cary Austin Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    Glad you got it working. Now you have time to research how a pressure tank works and why you need a Cycle Stop Valve. If nothing else, the CSV with a small tank is easier to keep covered and less likely to get hit by falling trees or debris.

     
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