a hammering case

Discussion in 'Irrigation' started by RhettMan, Oct 17, 2012.

  1. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Posts: 2,119

    city water

    pressure here at the bib is often 80-100, until a homeowner has to replace an appliance & then has a regulator installed, then lower, but that doesnt affect the system, (i dont think)

    run is prob 50 yards, its the highest point on the place.


    __
    what do you guys think about locating the valves and manually opening, say, 3 or 4 valves at once?
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,974

    If every zone is hammering, it might be a job for a slow-closing master valve.
     
  3. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,298

    Nope. The knock best I can tell is right near the bathrooms, and the only access to that plumbing is through tile or the roof, both of which would cost a lot of money to fix. It's not a serious knock right now, sounds like the pipe might be moving somewhere in the neighborhood of 1/32-1/16", but nonetheless it is a weak point.
     
  4. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,298

    Problem here is the zone valves need to close before the master.
     
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,974

    Yeah, today's controllers won't likely have what it takes to cure system noise with a master valve.

    As for the pipe noise near the toilet, why not try to immobilize the hidden plumbing with some expanding foam insulation?
     
  6. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,298

    Not to mention the zone valves need pressure to close.

    It is already foamed.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,974

    A sprinkler idea that might actually work on the toilet supply, is in the form of the "fluid resistor" in the old Rainbird brass valves, giving a long flow path in a larger diameter waterway.
     
  8. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,118

    Taking into account your anal nature it suprizes me that the water gods have placed you in the barrel on your own home.

    Since i know you followed the crews and anything that didn't pass the white glove test was addressed personally, i too am dazed and confused.

    Could you have a leak in the main before the house? What about backflow? Is the supply copper or pex?
    pex moves a lot, even when strapped firmly.
    Could debris be in the line?

    Have you placed gauges on spigots and bibs to measure pressure when flushing, done a meter check or purchased a buttload of beer? I have a feeling a lot of brewskies will be consumed before this puzzle is solved.

    Best of luck kiril
    Posted via Mobile Device
     
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,785

    Could not have happened to a nicer guy. :rolleyes:
     
  10. RhettMan

    RhettMan LawnSite Silver Member
    from Texas
    Posts: 2,119

    what would cause a ESP-SMT to send current even if in the "OFF" dial position,

    Unplugging the controller from outlet being the only thing to stop the current?
     

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