zone controls Caleffi is STOCKED and LOADED.  We have the plumbing and hydronic products you need including PRVs, TMVs, relay controls, separators, zone valves and more. Caleffi production and warehouse staff remain healthy. We are busier than ever thanks to our loyal customers. And our lead-times have never been better!  Bring it on. Caleffi Guaranteed. Click Read more

Introducing Caleffi’s new line of hydronic heating zone controls: the ZSR101, ZSR and ZVR Series. The ZSR101 Series is a versatile single relay control with two outputs for operating a 120 VAC pump with boiler enable, or two 120 VAC devices without boiler enable. Features include rear knock outs for 4×4 junction box mounting, convenient Read more