(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 6 of 6

Thread: Well pump runs too long

  1. #1

    Default Well pump runs too long

    Hi all,

    About a month ago we replaced the switch (?) on our well pump. It was a 20/40 so we adjusted to 30/50.

    The pressure seems to build okay until it hits about 48 psi. After that, it seems to run, and run, and run. We adjusted the spread to 18 lbs. (30/48) but it doesn't seem to matter.

    We checked the air pressure in the tank 9-lb. capacity), and that's set at 28 psi, correct?

    Would appreciate any and all advice given.

    Thanks,

    Jackie
    Last edited by Templass; 08-09-2008 at 01:23 PM. Reason: Forgot to state size of tank.

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,412

    Default

    the static pressure is good, about 2# less than the turn on pressure. It sounds like the pump may not be able to make it to 50 pounds. You might want to post in the pumps forum.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Master Plumber nhmaster's Avatar
    Join Date
    Jul 2008
    Location
    S. Maine
    Posts
    2,039

    Default

    I'm going to stir up a mess of controversy here, but this advice is based on a lot of years working on well pumps, so here goes.

    I NEVER adjust a pressure switch, for 15 bucks I get the right one. The adjustment made to bring a 20/40 to 30/50 is way outside the range and capacity of the springs.

    Your cut in pressure at the tank is good, 2lbs below switch setting.
    Your cut out pressure is god only knows where cause the pump won't shut off.

    Here's the problem though. Your pump should be able to make 50 lbs without problems so you either have a plugged pressure switch line or the jet is worn out or plugged, the impeller is worn out or plugged, and last and least likely is the separator diaghpragm in the pump has a hole in it.

  4. #4
    In the Trades Bob NH's Avatar
    Join Date
    Oct 2005
    Location
    New Hampshire
    Posts
    3,307

    Default

    Quote Originally Posted by nhmaster View Post
    I'm going to stir up a mess of controversy here, but this advice is based on a lot of years working on well pumps, so here goes.

    I NEVER adjust a pressure switch, for 15 bucks I get the right one. The adjustment made to bring a 20/40 to 30/50 is way outside the range and capacity of the springs.
    The only difference in the switches is usually the factory setting. The manufacturer specifies the settable range.

    Look at the range settings at the link. The FSG2 has a specified cutin range of 10 to 45 psi, cutout range of 20 to 65 psi, and an adjsutable range of 15 to 30 psi.

    http://ecatalog.squared.com/catalog/.../17320014.html

    I would not bill a customer for a new switch that then takes 5 times as long to change out as it takes to adjust the setting.

    There is more profit in selling the product and additional service but it may not be in the best interest of the customer.

  5. #5
    That's all folks! Gary Slusser's Avatar
    Join Date
    Aug 2004
    Location
    Wherever I park the motorhome.
    Posts
    6,790

    Default

    Dittos.

    And unless the contacts are truly bad, the switch is rarely the cause of the problem.
    Gary Slusser Retired (= out of business)
    Click Here to learn how to correctly size or program a water softener.
    CAUTION, as of Nov 12 2013 all YouTube videos showing how to rebuild a Clack valve have an error in them that can cause damage.

  6. #6
    Master Plumber nhmaster's Avatar
    Join Date
    Jul 2008
    Location
    S. Maine
    Posts
    2,039

    Default

    Quote Originally Posted by Bob NH View Post
    The only difference in the switches is usually the factory setting. The manufacturer specifies the settable range.

    Look at the range settings at the link. The FSG2 has a specified cutin range of 10 to 45 psi, cutout range of 20 to 65 psi, and an adjsutable range of 15 to 30 psi.

    http://ecatalog.squared.com/catalog/.../17320014.html

    I would not bill a customer for a new switch that then takes 5 times as long to change out as it takes to adjust the setting.

    There is more profit in selling the product and additional service but it may not be in the best interest of the customer.
    Yep, but I don't like messin with em and like it even less when the home owner does. Most have no clue as to which spring does what. I know they can be adjusted and I have adjusted them over the years but I try to avoid it.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •