1) As a conversion kit to use a new 40003916-001 replacement powerhead on an old style (pre 1986) V4043 or V8083 motorised valve.
A motorised valve that does not require this kit can be identified by a bump on the top of the powerhead.
2) Used to replace the innards on new style V4043H valve bodies. For example where the valve body is sticking or seized.
Part No. 40003916-001
For V4043C and V4043H zone valves including:
V4043C1156
V4043H1056
V4043H1007
V4043H1106
V4043H1080
272848
Honeywell motorised valves made before 1987 will also require..
Compatible replacement powerhead for:
Honeywell:
V4043H1056
V4043C1156 (isolate extra wires)
V4043H1007
272848
Can be used on a V4043H1106 only where the white wire is not used.
Honeywell..