"Mel" wrote in message
...
I recently replaced the solenoids on my two Lawn Genie automatic
anti-siphon
lawn sprinkler valves and now there is water hammer when they shut off.
They come on go off individually, back to back. I've had the valves for
several years and this is the time I've replaced the solenoids. Is there
a
fix for the water hammer?

The 'hammer' comes from all the water in the pipe run leading to your valves
being stopped all the sudden. This can happen with sinks and elsewhere
inside the home.

The usual fix is to run a pipe straight up and cap it, close to the valve.
Air will be trapped in there, acting like a shock absorber for the water.

Pagan