You must have debris in the valve dig it up ,remove dirt from around the entire area have your water off unscrew the top of the valve get ready to pump the water out of area take the top off the valve remove debris (small pebble,glue remains,pvc material) out with a needle nose pliers install it back tight fit and try again.
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