Description
Product Summary
The Caleffi Z55 is a zone valve from Caleffi, described by the manufacturer as: 24V NC 2 way 3/4" sweat 7.5 cv 2 zone valve aux. switch / terminal block. It is rated for 24V, sized for 3/4" connections (sweat) and normally closed.
A zone valve opens and closes to let hot or chilled water flow to one zone of a hydronic system when that zone's thermostat calls. Its end switch, when equipped, tells the boiler or zone panel to start the circulator and burner. Signs of a failed zone valve include a zone that will not heat with 24 volts at the actuator, a zone that heats when it should not, or a boiler that will not start because the end switch never closes.
Before you order, match Z55 to the part number on the part you are replacing or in your equipment's repair parts list, and confirm the voltage, size and connections match your equipment. If you are not sure which part your equipment needs, call us at 1.888.509.3391 with the model and serial number and we will confirm it for you.
Key Features
- Genuine Caleffi part: Manufacturer part number Z55, factory new.
- Voltage: 24V.
- Pipe Size: 3/4".
- Part type: Zone Valve.
Frequently Asked Questions
Is this a genuine Caleffi part?
Yes. This is the Caleffi Z55, a factory-new zone valve from Caleffi.
How do I make sure it fits my equipment?
Compare Z55 with the part number printed on the part you are replacing or listed in your equipment's repair parts list, and confirm the voltage and connections match. If you are not sure, call us at 1.888.509.3391 with your model and serial number and we will confirm it.
Can I replace just the actuator?
On most zone valves, yes. If only the motor or powerhead has failed, replace it without draining the system or cutting the piping.
Should a professional install this part?
Yes. Gas, electrical, hydronic and combustion components should be installed by a qualified technician who can test the system afterward and follow the codes that apply where you live.
