Shutting Off Water to Abandoned Hillside Sprinkler System

To stop water flow to a hillside Rain Bird valve box (3 valves, Toro controller unplugged) with a persistent puddle at the retaining wall, you must cut the supply at the source.

Find the Supply Connection

1. Dig at the valve box to expose the main supply pipe entering the manifold.
2. Hand-dig every 2–3 ft back toward the house/water meter until you find the tie-in point (usually a tee off the house main or a dedicated irrigation main).

Two Permanent Solutions

1. Install a ball valve in the supply line at the tie-in. Close it, cap the downstream side. Future-proof.
2. Cap the supply line directly at the tie-in (PVC cap or threaded plug). Simpler, but harder to reuse later.

Why the Controller Unplug Doesn't Work

Unplugging the controller only stops electrical signals. If a valve diaphragm is torn or debris holds it open, water flows 24/7. Mechanical shutoff is required.

Once capped, the puddle will dry. You can then use manual Rain Bird sprinklers as desired.