Hydrostatic pressure part 2

Discussion in 'Water Features' started by STL Ponds and Waterfalls, Apr 13, 2009.

  1. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Posts: 1,177

    I'm building my own personal pond at the moment. Well,trying to between working and the rain. Anyway I keep getting water under my liner and I'm worried about it putting to much pressure on the liner and tearing the bottom of the liner. I say this because the rock we use around here is pretty jagged and some what sharp for epdm liner. This is a new problem as I stated in another thread. If I run a pipe under the liner and exhaust above grade will the pressure force it out or will I need to pump it out since it will be going uphill?
     
  2. Fishwhiz

    Fishwhiz LawnSite Member
    from Oregon
    Posts: 112

    You will have to either pump or use sufficient ballast, or pop in a dry well if you can get below the heacy soil it sounds like you have. I assume this problem is only seasonal since you wouldn't need a liner if you had permanent head pressure.
     
  3. STL Ponds and Waterfalls

    STL Ponds and Waterfalls LawnSite Bronze Member
    Posts: 1,177

    I dug in a drain exiting the water from the skimmer area. It worked out for the best since I have gravel all around the skimmer keeping it from pressure caving etc. Yep, it's a spring rain deal plus my patio runoff doesn't help.
     

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