Manual Sprinkler Valve Won't Shut Off: Ball or Gate Valve Failure

Three manual shut-off valves control front yard zones. The middle valve won't close; water runs continuously. House main had to be shut off.

Diagnosis

The valve's stem has likely disconnected from the gate (gate valve) or ball (ball valve). Turning the handle no longer moves the closure element.

Repair Options

1. Replace the valve: Cut out the old valve (threaded or soldered) and install a new ball valve. Best long-term fix.
2. Add a new valve downstream: Leave the broken valve in place (open), install a new ball valve just after it. Less excavation if the broken valve is buried deep.

Both require pipe cutting and fitting. If unsure of valve type, expose it first. Ball valves (¼ turn) are preferred for reliability.