Orbit Sunmate Valves Banging, Heads Don't Pop – Diaphragm Failure

Two stations bang rhythmically, heads sputter. Manual bleed works. Valves 2 years old.

Cause

Diaphragms failing prematurely (cheap valves). Not opening fully on solenoid signal.

Fix

• Replace diaphragms (if valves serviceable).
• Better: replace valves with Rain Bird DVF series.

Guide: www.irrigationtutorials.com.