Testing latteral

Discussion in 'Irrigation' started by Lordtimothy, Sep 10, 2013.

  1. Lordtimothy

    Lordtimothy LawnSite Member
    Messages: 171

    I am currently helping out on a project that has a few drainage issues. Water is getting inside the building's crawl space. There is 2 spray zones near the building. They just put some tile next to the foundation and drained that into 33 gallon drainage basin.

    Ran the 2 zones of sprays for 15 mins each and the basin was full of water within a hour. The guy in charge is convinced that the 2 zones are leaking underground somewhere so he wants me to test the latterals to see if they are leaking.............it is a 13 year old system with drains.

    So next week I am going to pressure test the zone. Any thoughts about what would be a acceptable amount of loss in the zone pressure over time??
  2. mitchgo

    mitchgo LawnSite Silver Member
    Messages: 2,955

    Probably something simple. Verifying and confirming are your most important tools.

    Turn off all your sprays or cap heads and utilize your water meter. An acceptable range of water loss should be less then a gpm with all the heads off as much as possible . If the flow is higher then you probably have a leaky fitting such as a marlex.

    It's probably all vans and 15 min on a shrub zone around a building will no doubt flood the area. Change out nozzles and implement a cycle soak schedule

    No need to over think this just yet. Keep it simple for now
  3. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,358

    Good solid advice Mitchell.

    I have always said that "you can't fix what you can't find".

    There is no use in treating the symptoms, treat the disease.
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  4. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    I agree with Mitch. While it may appear to be a leak, it could be something as simple as improper management.
  5. eludemann

    eludemann LawnSite Member
    Messages: 58

    He did say "with drains". Won't all the lines drain out like they're supposed to after the zone shuts off? That could be a lot of water, depending on the layout of the zone.
  6. TX Easymoney

    TX Easymoney LawnSite Platinum Member
    Messages: 4,109

    Or as simple as a missing or broken head..an older systems which have not been regularly maintained could have buried heads ...a missing nozzle on a buried head could put out lots of water...
  7. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,358

    When the heads are plugged, turned off, capped or whatever, the inrush of water can be counted at the meter along with any loss from leaks.

    Verify first, i have seen many leak jobs that aren't leaks at all.

    Treat the disease, not the symptoms. :)
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