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The last 8 posts

Tuesday, April 19th 2005, 3:42am

by dshurttz

Thanks to the gurus who know their stuff so well!! Greatly appreciated.

Wednesday, January 5th 2005, 11:57am

by in6095

If the hammer valve does not seem to fix the problem. More than likely the contractor who installed your system overloaded the zones (to many GPM per zone) Industry standard is water traveling 5 feet per second. Any time you demand more water than what the pipe is sized for, you get water traveling faster that 5 fps. Any thing over 7fps and high water psi will cause hammer when the zone turns on and off.

The way you can prove this is the cause. Have a couple of kids stand on 30% of the heads on one zone so they cannot come up. Have someone else turn on that zone. Listen to the pipes they should not hammer anymore since you are not demanding more than what your water pipes are sized for.

The fix: most controllers have a "jumper" in them that you can allow a 5 second delay between zones turning on and off. This will not allow 2 zones to be on while move from one to another.

You can install smaller nozzles on your heads or split up some zones.

good luck

Thursday, December 9th 2004, 1:18pm

by SteelheadnGus

Which first hammer valve and then backflow or backflow and then hammer valve?

Thank you very much for the help.

Thursday, December 9th 2004, 8:35am

by nestors

install a backflow and a hammer valve unit ,Home Depot sells them

Friday, November 12th 2004, 1:00pm

by SteelheadnGus

I have exactly what you precribed in a backflow valve before the sprinkler vavles and I still get hammering????

Sunday, October 31st 2004, 1:23pm

by nestors

You have to have a plumber install a Hammer valve in the house where the water comes in .And if you want to go one further install a BackFlow Preventer before your sprinkler main valve (gate or Ball valve)

Nestor's Sprinklers & Lighting

Monday, October 25th 2004, 9:51am

by yogibear

Check your water pressure regulator. I have just changed mine and the hammering stopped.

Friday, October 1st 2004, 12:54pm

by dshurttz

Hammering as each zone starts up

As each zone starts up, there is a hammering in the house lines - sounds like water is being turned off/turned on rapidly (like the washing machine does). Also, the vacuum breaker spouts water each time it hammers, then shuts off. Some zone start-ups are more pronounced than others.
Any help?