HRM BOILERS COM424 COMPATIBLE DIAPHRAGM SERVICE KIT. CONTAINS NEW DIAPHRAGM, PUSH PLATE AND PUSH-ROD BUSH AND ORING, AND 2 X SENSING TUBE SEALS, AND A SACHET OF SILICONE GREASE. IF YOU HAVE CHANGED THE DIAPHRAGM ON YOUR BOILER, AND YOUR VALVE IS STILL NOT MOVING.
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