Leaky Zone After Two Valve Replacements: Flush Debris from Lowest Valve

Zone Stays Wet Days After Watering: Debris in Lowest Valve

Rain Bird system. Zone 1 valve replaced twice, still wet around last heads. Water off at main or controller → dries up. Valve tests "good."

The Hidden Cause

Zone 1 is the lowest valve. Debris (sand, pipe shavings) settles there, prevents full closure. Each replacement flushes some, but more arrives.

Definitive Fix

1. Dig up valve. 2. Remove valve body from line. 3. Connect short pipe to inlet fitting. 4. Turn on water → flush into bucket to capture debris. 5. Reinstall valve (new diaphragm), test.

Why Bucket Flush Matters

You see what's coming out: sand, PVC shavings, Teflon tape bits. Confirms source and verifies clean line.

Prevention

Install wye strainer upstream of valve manifold if debris is chronic.