Correct installation of pump in relation to carbon filter.




Results 1 to 5 of 5
  1. #1
    Join Date
    Nov 2007
    Location
    Cape Town
    Age
    73
    Posts
    2,751
    Thanked: 838

    Default Correct installation of pump in relation to carbon filter.

    I have a carbon filter fitted in-line from the water tank. Where should it be located? Before the pump or after the pump?

    At the moment is is after the pump. At times it would appear as if there is an air lock causing the pump to run without pumping. It is a self-priming pump located about 50 mm above the tank.

    My guess is that water runs back to the tank when the pump is switched off, but some stays behind in the filter. with only air in the vicinity of the pump it cannot suck water from the tank because the existing water in the filter restricts air flow dramatically hence insufficient sucking action to get water to the diaphragm to pump it through the filter. The pump is capable of 35Psi, but obviously only once its body is filled with water, not on an empty belly so to speak.

    With the pump below the tank a vacuum or bubble will be eliminated, but I do not want to install the pump below the caravan floor since it is a gravel roader and the stones will have its way with it.

    Your thoughts on an installation that would operate trouble free please.
    *
    Youth is such a wonderful thing - what a pity it is being wasted on the young.

  2. #2
    Join Date
    Jun 2010
    Location
    Wilderness
    Age
    57
    Posts
    3,866
    Thanked: 703

    Default Re: Correct installation of pump in relation to carbon filter.

    Fit a non return valve as close as possible to the tank.
    2011 Isuzu 300d-teq 4x4 d/c
    The decision you make today, will determine the road you walk tomorrow

  3. The Following User Says Thank You to Pieterk For This Useful Post:


  4. #3
    Join Date
    Mar 2017
    Location
    Okahandja
    Age
    53
    Posts
    632
    Thanked: 382

    Default Re: Correct installation of pump in relation to carbon filter.

    Filter after pump and non return valve close to tank as possible as Pieter said.

  5. The Following User Says Thank You to Erwin Schimper For This Useful Post:


  6. #4
    Join Date
    Mar 2008
    Location
    De Wildt
    Age
    56
    Posts
    30,944
    Thanked: 6909

    Default Re: Correct installation of pump in relation to carbon filter.

    Quote Originally Posted by Erwin Schimper View Post
    Filter after pump and non return valve close to tank as possible as Pieter said.
    yes

    a pump should push through a filter, never suck
    2012 Jeep Sahara Unlimited 3.6 V6
    Ela Diablo: Land Rover S2A 109 PUP: SOLD

  7. #5
    Join Date
    Feb 2011
    Location
    Kuilsrivier
    Age
    47
    Posts
    1,841
    Thanked: 70

    Default Re: Correct installation of pump in relation to carbon filter.

    A diaphragm pump should not need a non return valve.
    It is more than possible that some dirt is stuck inside the pump. Also the reason it cannot "suck" water from the tank.
    Remove the pump and service it.
    Then install say a 1micron filter before the pump, or perhaps a strainer? That should keep the dirt out of it.
    Yes, to be 100% correct your should install it after the pump, but then it is not really able to protect you pump from dirt now, is it?


    2007 Nissan Navara 4L Auto - Worshond


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
  •