2 Port 22mm or 28mm Motorised Zone Valve Head Can Replace Honeywell V4043H1106
Honeywell motorised valves made before 1987 will also require a 40003918-006 conversion kit. ¨ Valves made after 1987 can be identified by a bump on the top of the powerhead. Honeywell V4043H1056. Honeywell V4073H1106.