Gas valves are model-specific on Westinghouse gas tanks and tankless. Within warranty, order through Westinghouse tech support — replacement gas valves are tuned for the specific model and combustion configuration.
Gas valve by product line
Atmospheric WGR storage
- Honeywell or White-Rodgers standing-pilot or millivolt valve
- Includes integrated thermostat
- Standing pilot on older models; electronic ignition on newer
- Replacement via standard ¾" NPT
Power Vent WGRPV storage
- Electronic gas valve coordinated with blower
- 120V operation
- Modulating capability on some models
Condensing tankless WGRGH
- Modulating gas valve for 10:1 turndown
- Pneumatic reference to venturi (gas/air ratio control)
- Requires combustion analyzer trim after replacement
When to replace
- E01 ignition lockouts persisting after igniter/flame sensor service
- E02 flame failures despite good gas pressure and clean sensor
- Won\'t hold pilot (atmospheric) after new thermocouple
- Visible damage to valve body
- Soap-test reveals valve body leak (vs fitting leak)
Diagnostic before replacement
- Verify gas pressure with manometer (7" WC NG, 11" WC LP under load)
- Voltage to valve coil during ignition trial
- Listen for valve click when energized
- Soap-test fittings for external leak
Warranty replacement
- Call Westinghouse: 1-800-388-0006
- Provide model, serial, install date
- Tech support diagnoses; ships valve if covered
- Within 6-year parts warranty (storage) or 5-year (tankless)
Out-of-warranty cost
- Atmospheric gas valve: $180-280
- Power Vent gas valve: $250-400
- Tankless modulating gas valve: $300-500
- Plumber labor (gas work): $150-300
- Tankless requires combustion analyzer re-trim — adds $100-200 service
Critical: combustion analysis after tankless valve replacement
WGRGH tankless gas valve replacement requires combustion analyzer verification of CO2, CO, O2 levels. Without proper trim, the new valve may run rich (high CO, sooting) or lean (lean misfires, heat exchanger damage). Contractor work — analyzer required.
Bottom line
Gas valve replacement is contractor work on gas tankless; DIY-capable on atmospheric storage if you have gas-fitting experience. Always pressure-test fittings with soap solution before relighting. Within warranty, Westinghouse covers parts; labor not covered.