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Thread: Flexible Water tank

  1. #1
    Join Date
    Mar 2019
    Location
    Rushworth, Australia
    Posts
    691

    Default Flexible Water tank

    Is it possible to fit a flexible water bladder and draw water from it using one of those manual water pump/tap. Difference in height would be about 18” from bladder to tap. Does the tap draw water by vacuum or would it pressurize tank then another pipe carries water to outlet. This is for a 22’ trailer sailer. Don’t want electric.

  2. #2
    Join Date
    Jul 2007
    Location
    Wongawallan Oz
    Posts
    16,138

    Default Re: Flexible Water tank

    Theoretically yes, though I’m not talking from any experience of fitting and using one so take it for what it’s worth (and it may somewhat depend on the pump), but a manual pump isn’t really doing anything differently than an electric pump in that it’s still sucking water from the tank, either as a diaphragm pump or a piston pump. Those bladder tanks don’t have a pick up pipe so as long as there’s no air in the bladder it should work as well as an electric pump.
    Larks

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  3. #3
    Join Date
    Aug 2000
    Location
    Bay of Islands,N.Z.
    Posts
    27,618

    Default Re: Flexible Water tank

    Surely ,did it for a decade or two with a manual pump, doing again now with a 12v. Great things, don't need a breather.
    There is no pressure involved, it all sucks.
    Incidental, I used a plastimo brand bladder, it lasted ooo say 20 years and then became brittle and popped a corner. I'm happy with that and replaced it with the same in 2018.
    Last edited by John B; 11-22-2020 at 11:03 PM.

  4. #4
    Join Date
    Apr 2015
    Location
    St. Helens, Oregon
    Posts
    2,563

    Default Re: Flexible Water tank

    I have a bladder on my glass boat. So far, so good and I use a manual pump lifting ~ 20".

  5. #5
    Join Date
    Oct 2000
    Location
    Padanaram, MA USA
    Posts
    9,923

    Default Re: Flexible Water tank

    Bladder tanks work fine. It’s good to have a vent so they can burp themselves.

  6. #6
    Join Date
    Jan 2002
    Location
    victoria, australia. (1 address now)
    Posts
    64,247

    Default Re: Flexible Water tank

    I had bladder tanks (ex military new). Tough as. We had 4 under the house between the stumps. Don't remember the size.

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