Copper water line noise when sprinklers run

Discussion in 'Irrigation' started by reb12, Dec 18, 2013.

  1. reb12

    reb12 LawnSite Member
    Male, from Florida
    Posts: 92

    OK Gurus, It's been awhile since I have posted on the site, but I have a client in SW Florida, who gets awfull noise when his #1 and #3 sprinkler valves are running. Only those two out of five total cause the noise in his copper house water line. Has an above ground sprinkler valve manifold, 1" Irritrol 205 vlaves with flow controls, so I assumed his #1 and #3 lateral sprinkler lines (1") were laying across his copper water house line underground, as adjustments to the flow controls on the valves did nothing to repair the noise problem. Dug it up and they are 4" above his water line, which is pvc until it gets to the house, and then rises in 1/2" copper. When you hold the copper house line while zones 1 or 3 run on the irrigation, it vibrates quite bad, then resonates in the house making a bunch of noise inside. His copper house lines are clamped to the floor joists in a crawl space under his floor. So, any ideas what could be causing this vibration and noise in his house copper lines, when only two different sprinkler valves run? When I searched the posts on these issues they were 5-7 years old and none addressed this type of problem specifically. Thanks, any ideas would be appreciated!!! I'm stumped!!
     
  2. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,070

    Is this a metered service? If so, what is the use on each zone when running? I'm actually asking you about all zones when running. You need benchmarks for comparison.
    Posted via Mobile Device
     
  3. reb12

    reb12 LawnSite Member
    Male, from Florida
    Posts: 92

    Yes, 5/8" meter located just off the street 50+ feet from the vertical copper 1/2" line running about 3' up the side of the house. I can run a GPM per zone tomorrow and let you know. I will also do a pressure test at a hose bib.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,907

    Identify the backflow preventer as well, make, model number, and size.
     
  5. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,070

    I wonder how long this has been occurring because, it sounds like a velocity issue. Flow comparisons at the meter will tell you if it is.

    What's the visual appearance of the zones when they're running? How do they compare with the normally operating zones.
    Posted via Mobile Device
     
  6. grassman177

    grassman177 LawnSite Fanatic
    Posts: 9,795

    pretty much what I was thinking. that and pressure too high usually at the same time.
     
  7. reb12

    reb12 LawnSite Member
    Male, from Florida
    Posts: 92

    I will play with turning down at the meter. It started, we think, around the time Marco Island increased it water pressure to deal with low pressure on the south end of the island. This created all kinds of problems where the pressure was adequate before as the pressure was increased on the north end of the island. With a Watts anti syphon only, on the sprinkler turn off riser at the meter, maybe it is likely that the pressure is causing the house line, which starts there as well to resonate the noise all the way to the house??
     
  8. reb12

    reb12 LawnSite Member
    Male, from Florida
    Posts: 92

    Weird though that the noise only happens inside the house when a couple of sprinkler zones are running, not the house water on, and the copper pipe feeding the house has a strong vibration, like water is flowing through it with tremendous pressure??
     
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,907

    Easy thing to try is to throttle down the flow controls on the zone valves.
     
  10. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,070

    " Has an above ground sprinkler valve manifold, 1" Irritrol 205 vlaves with flow controls, so I assumed his #1 and #3 lateral sprinkler lines (1") were laying across his copper water house line underground, as adjustments to the flow controls on the valves did nothing to repair the noise problem"
    Posted via Mobile Device
     

Share This Page