Hydronic Circulator Switching Relay

Circulator Pump Relay. Pump Zone Controls in Hydronic and Radiant Heat Applications. Caleffi and Taco pump relays used for many types of hydronic heating systems when you want to control on and off function of pumps.

Taco Switching Relay - SR501-4
Taco Circulator Relay - SR502-4 2
Caleffi Switching Relay - ZSR103
Taco Circulator Relay - SR503-4
Taco Circulator Relays EXP Series
Caleffi Switching Relay - ZSR104
Taco Circulator Relay - SR504-4
Taco Circulator Relay - SR506-4
Taco Switching Relay - SR501-EXP-4
Taco Switching Relay - SR503-EXP-4
Caleffi Switching Relay - ZSR106
Taco Switching Relay - SR504-EXP-4
Taco Switching Relay - SR506-EXP-4
Circulating Pump Flanges