The best thing to do is install any valve with a flow control then install a prv pressure regulater valve then install a filter which is usually used for drip systems you will have no problem then.
Nestor's Sprinklers & Lighting
Roswell,Ga.
Vincent Nestor
Nestor's Sprinklers & Lighting
Alpharetta,Ga.30022
vpn1@bellsouth.net
www.NestorsLandScape.com
www.GeorgiaLighting.net