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Leaking Hardie Valves: Diaphragm Replacement vs. Full Valve Swap

Three 12-year-old Hardie valves leak at diaphragm area. Tightening screws helped but not fully. Installer says replace valves, not diaphragms.

Advice

Diaphragms can be replaced without full valve change. Take old diaphragm to irrigation supply (likely Hardie HR-1). However, Hardie valves often develop cracked seats after 10 years, necessitating full replacement anyway. Upgrade to Rain Bird DV-100 with flow control for 12+ year reliability.

Irrigation: Anti‑Siphon Valve Leaks – Install Inline Valve Instead; Identifying and Replacing a Hardie Hydraulic Valve in an Indexing System; Valves 2 & 4 Low Pressure: Replace Diaphragms, Verify Orientation; Replacing Obsolete Rain Jet Valves: Compatible Options; Weeping Sprinkler Heads – Valve Leak or Low-Head Drainage; Hardie 1.5" Valve Slow Leak – Diaphragm or Cracked Body; Choosing a Sprinkler Valve for Low-Pressure Tank Drainage; Intermittent Solenoid Valve Operation: Power & Adjustment Checks; Hardie 700 Series Valve Leak: Rebuild vs. Replace; Recurring Hunter Valve Weeping: Install a Filter

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