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Mend Landis & Gyr TRV Radiator Leak Valve

Landis & Gyr Thermostatic Radiator Valve leaking at Valve?

Is it possible to unscrew the cover nut with the actuator pin going through it without draining down the system to replace the o ring to stop the water leaking out between the housing nut and the actuating pin

Rob
November 2008
Landis & GyrLandis & Gyr TRVHeating, Home Heating SystemsRadiator Leak Valve
u may be lucky mate,sometimes u can,i have inthe past,may be easier to change valve

gasman1uk
November 2008

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Landis & Gyr TRV Leak: O-Ring Replacement