Pressure switches and pumps

Discussion in 'Pumps and Tanks Well Forum & Blog' started by mark1, Jan 10, 2006.

  1. mark1

    mark1 New Member

    Messages:
    4
    when you have a 20/40 or 30/50 etc. switch how do you know which one to use. Why do you use different ones.

    Mark
  2. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    You can use either switch. Your well tank precharge needs to be 2-3 # lower than the turn on pressure. You find out with a pressure gauge like you test tires with and you check your tanks charge with no water pressure in the line. You can add air or remove air as needed to fit what ever pressure switch you want to use.
  3. rshackleford

    rshackleford New Member

    Messages:
    284
    Location:
    Eastern Montana (The Bakken)
    those two switches are identical with different factory settings. each switch can be adjusted up or down. it is simpler to start out with a given cut in/cut out then to adjust each switch.
  4. Pumpman

    Pumpman Pump Sales

    Messages:
    191
    Location:
    So. Cal
    Most water systems I work on have 30/50 switches installed. It's really a matter of preference, as to how much pressure you want or need. Most city water pressure in this area is around 45 psi, so we try to keep the rural houses at about that same point.
    If you have a 2 story house you'll probably want a little higher pressure for that 2nd floor shower.
    And, of course, you have to consider the capabilities of the pump and well in sizing the pressure switch.
    Ron
Similar Threads: Pressure switches
Forum Title Date
Pumps and Tanks Well Forum & Blog Pump blowing pressure switches, Help me please.. May 17, 2013
Pumps and Tanks Well Forum & Blog float and pressure switches Jul 30, 2009
Pumps and Tanks Well Forum & Blog Where can I purchase pressure tanks and switches? Mar 11, 2009
Pumps and Tanks Well Forum & Blog Well pump pressure sswitches Jul 28, 2008
Pumps and Tanks Well Forum & Blog Pressure Tank Yesterday at 5:49 AM

Share This Page