About this item

• 2 Port 22mm or 28mm Motorised Zone Valve Head Can Replace Honeywell V4043H1056
• This unit is a direct replacement for the following installed with a longer guarantee Honeywell V4043H1056 Honeywell V4073H1106 Honeywell V4043C1156
 Honeywell V4043H1007 Honeywell V4043H1080 
Honeywell 272848 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 British gas no. 378452