Is one of the zone valves in your hot water heating system stuck open or not working? Instead of replacing the whole valve body, you can often just swap out this motorized actuator head. This is a direct replacement for the Honeywell V8043E series zone valves (like models V8043E1061, V8043E1012, etc.) and fits part numbers 40003916-026 and 40004850-001. It's a 24-volt motor with an end switch, normally closed operation, and comes with 18-inch lead wires for connecting to your thermostat wiring. It's made from metal to handle the heat (rated for up to 125°F ambient). If your valve is leaking, you need a new valve body. But if the motor has failed, this affordable head replacement can get your heating zones working properly again and extend the life of your system. Make sure to check your old part number first!
