Ball Valve to Sprinkler System

[shebedo]

The ball valve lever that shuts off my water supply to my outdoor sprinkler, does not seem to be shutting off the water completely - there is a small drip that is still coming out of the drain hole after shutoff. Is there any adjustment or fix I can do to the valve, without having to replace the copper valve which would mean hiring a plumber?

Thanks

[Mikey]

Are the valve and piping oriented so that you can be sure the drip is caused by the valve leaking, and not water returning from the sprinkler side?

[shebedo]

Honestly I dont' know. But I am pretty sure it is not coming from the outside system. The sprinkler system has had all the outside drain valves opened and drained. The drip has been hapenning for about a week now or so. I had turned on the sprinkler system for a while earlier this spring, but have now shut it back off because of the colder weather.