The Caleffi ZSR104 is a 4-zone expandable switching relay with priority, designed for multiple zone hydronic heating systems. It interfaces with low voltage thermostats and controls up to 6 zone pumps and a primary pump, featuring LED indicators for system status and troubleshooting.
Caleffi ZSR104 Z-One 4 zone pump Control
Original price was: $203.46.$105.49Current price is: $105.49.
Sale!35 in stock
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