Water hammer damage (photos, please)

Discussion in 'Irrigation' started by Wet_Boots, Oct 24, 2010.

  1. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,313

    just thought these were cool

    shock-signatures.gif

    all-waves-fast-2.gif

    water-hammer-valve.jpg

    water-hammer-12.jpg

    1110912840_small.jpg
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,327

    Interesting stuff, there. I wonder what difference is seen in poly pipe versus PVC pipe in the zone plumbing, when it comes to that startup banging.
     
  3. Very interesting stuff Jim. where did you find all that?

    If it's from surge into empty pipes in the laterals I can't see that poly would make that much difference on the banging. Never used or studied poly so just a guess.
     
  4. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,308

    I have seen this site before, but you really should link the source if you are going to attach the images instead of linking to them directly.

    http://www.liquid-dynamics.com/
     
  5. WalkGood

    WalkGood LawnSite Bronze Member
    Posts: 1,910

    Does the rumbling happen all the time the zone(s) is/are open? Or just when it opens? I've heard this rumbling with high water pressure when the valve first opens. Kinda like the valve diaphragm is farting (bouncing open/shut) .... bbrrraappp bbrrappp brrap! I am thinking that the high water pressure is "fighting" the solenoid. Shakes the copper lines that are not secured. Would a very large expansion tank help in this situation?
     
  6. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,327

    Throttle down the zone valves for a start
     
  7. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,308

    I don't think this is due to high water pressure as I have seen this occur (diaphragm slapping) with low water pressure (~ 50 PSI) as well.
     
  8. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,313

    poly, poly, poly, badgerbadgerbadgerbadger

    middle of the night search pete, i don't sleep more than a few hours straight.

    doggone man, just last year i could barely type and mitchell was going to stomp a mudhole in the middle of me for my lack of sentence structure. i'll try harder, structure is still lacking too.

    no one noticed the clown...............................:hammerhead:
     
  9. Kiril

    Kiril LawnSite Fanatic
    Posts: 18,308

    No worries here .... just trying to keep you from getting slammed by someone for jacking their content without proper referencing. Actually, it is better to do what you did than link the pic directly (which I do and shouldn't) because that amounts to stealing bandwidth.
     
  10. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,903

    I did not know that, thanks Sonny.
     

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