Grant Erwin wrote:
I just ran into my old boss. He is now retired, and an avid gardener. He
put in a 12-zone automated watering system, and there is a problem in it
which is driving him bonkers. I'm posting this because you guys know
everything worth knowing.

His water system starts at the meter, then it runs to a tee, and off of
one leg goes his entire outside watering network. The other leg of the
tee goes to his house. Where the water enters his house, he has a
pressure reducing valve. On the outside watering leg, there is a
backflow prevention valve to ensure that even in the event of negative
city water pressure his gardening water can never wind up in his
neighbor's water glass.


snip

Is the regulator, one of those in-line 8-gpm 25-psi type?
If so, they chatter like crazy, on startup.
The regulator, should be as close as possible to the outlet
of the anti-siphon valve.

My neighbor had the same problem, I ended up curing it by
putting a 1'x1' square loop buried in sand, in the pipe.
This does two things, (1) breaks up a long straight run,
(2) puts some flex in the system.

I have a 6 zone system in the back & a 5 zone in the front.
Each circuit has an anti-siphon valve - regulator - Y filter.
No problems, the Y filter acts like a small accumulator/snubber.

One night when my water softener went off, I thought the house
was caving in. Crawled under the house, to find a hanger on
a 40' run to the softener, had come loose.

--
Gary A. Gorgen | "From ideas to PRODUCTS"
| Tunxis Design Inc.
| Cupertino, Ca. 95014