Why This Sprinkler Head Kept Leaking (Tracking Down a Buried Valve)

A constantly leaking sprinkler head usually isn't a bad head—it's a weeping valve diaphragm allowing water to slip through 24/7. On this service call, the customer had water pooling in the lawn, 11 zones to sort through, and no idea where the valve was buried. Watch the full diagnostic process: tracking down the lost valve using an underground locator hooked into a nearby drip zone, managing elevation drainage with a siphon pump to keep the manifold clean, and rebuilding a 1" Hunter PGV valve in place without cutting a single inch of PVC. TIMESTAMPS: 0:00 – The Mystery: A Sprinkler Head That Won't Stop Leaking 0:17 – The Diagnosis: Why Leaking Heads Mean a Weeping Valve 0:43 – Locating Strategy: Tying the Wire Tracker into a Known Drip Valve 3:07 – Found It: Digging Out the Valve Box by the Retaining Wall 3:41 – Dealing with Elevation Backflow & Using a Siphon Pump 4:16 – The Fix: Gutting a Hunter PGV Valve (No PVC Cutting Needed) 5:18 – Verifying Zone Wires & Using the Manual Bleeder 5:44 – Listening for Valve Weep & Reading the Water Meter 7:06 – Proper Assembly: Internal Filter, Diaphragm & Bonnet Alignment 8:25 – Drill Clutch Settings & Torquing in a Star Pattern 9:41 – Stripping Leads & Sealing with Waterproof Wire Nuts GEAR & PARTS FEATURED: Hunter PGV-100 1" Valve (Guts & Bonnet used for rebuild) Hand Siphon / Bilge Transfer Pump Heavy-Duty 1/4" Hex Nut Driver Extension Bit Waterproof Silicone-Filled Wire Connectors Underground Wire & Valve Locator Subscribe for real-world field troubleshooting, irrigation system diagnostics, and professional trade walkthroughs.