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
Alpharetta,Ga.
www.NestorsLandScape.com
Vincent Nestor
Nestor's Sprinklers & Lighting
Alpharetta,Ga.30022
vpn1@bellsouth.net
www.NestorsLandScape.com
www.GeorgiaLighting.net