(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 4 of 4

Thread: Pump Problem?

  1. #1
    DIY Junior Member caribu's Avatar
    Join Date
    Oct 2011
    Location
    Michigan
    Posts
    1

    Default Pump Problem?

    About a week ago I went to turn my shower on and noticed that when I turned my water on it ran at a very slow trickle then turn on with normal pressure after about 20 to 30 seconds. I have not noticed any problems for about a week. This morning my daughter called me with the same problem but this time the water was trickling out very slow for a longer period of time then suddenly turned back on with normal pressure. We have a well, not sure how deep. The pressure tank was replaced in December of last year. The pressure gauge appears to be holding at normal ranges. It is very inconsistent so I'm having a hard time trying to figure out what's happening. Any ideas?

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,680

    Default

    My guess is that you are not looking at the gauge at the moment that the water is a mere trickle. The gauge could well be lying and the pressure switch may be failing.

    Most likely, the tank is empty at the time and the jet pump (I'm guessing) is just starting and starving for pressure. Make sure the tank precharge is not too high for the switch kick-in setting.

  3. #3
    Moderator valveman's Avatar
    Join Date
    Mar 2006
    Location
    Lubbock, Texas
    Posts
    4,156

    Default

    If this is a jet pump, I would think you are losing prime.

  4. #4
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,680

    Default

    I think it's losing its head, not its prime. A jet pump uses pressure to make more pressure. At the same time it uses volume to make more volume. If you cut the precharge too fine, the pressure dives just as the pump is coming on and hesitates. How would the precharge vary over time?

    A pressure switch setting can drift with age or from mineral buildup under the diaphragm. A bladder can fail over time and slowly "jack up" the precharge or silt/can displace the water between the bladder and the tank.

    A common mistake that people make when setting the precharge is to assume their air pressure (usually read with a tire gauge) reads the same as their water pressure gauge. Seldom do they read the same and so they need to be calibrated.

Similar Threads

  1. pump problem
    By patsy297 in forum Shower & bathtub Forum & Blog
    Replies: 1
    Last Post: 02-25-2009, 12:45 AM
  2. Pump problem?
    By JayVee in forum HVAC Heating & Cooling
    Replies: 5
    Last Post: 10-25-2008, 04:41 PM
  3. Pump/Well problem....
    By swark in forum Pumps and Tanks Well Forum & Blog
    Replies: 20
    Last Post: 01-09-2007, 12:31 PM
  4. New Pump New Problem
    By ceg in forum Pumps and Tanks Well Forum & Blog
    Replies: 11
    Last Post: 11-09-2005, 08:28 AM
  5. Well Pump problem
    By P.C. in forum Pumps and Tanks Well Forum & Blog
    Replies: 4
    Last Post: 06-13-2005, 12:17 PM

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
  •