2 Port 22mm or 28mm Motorised Zone Valve Head Can Replace Honeywell V4043H1056
2 Port 22Mm Or 28Mm Motorised Zone Valve Head Can Replace Honeywell V4043H1056 V4043H1106 V4043C1156 V4043H1007. Honeywell motorised valves made before 1987 will also require a 40003918-006 conversion kit.