Normally Closed.
Watts Polypipe 4 Zone 24v Master Wiring Center TFH.WM.LV P05187 (PL8)
Watts Polypipe 4 Zone 24v Slave Wiring Center TFH.WS.LV P02088 (PL9)
Watts Polypipe 4 Zone 24v Master Wiring Center TFH.WM.LV P05187
Polypipe PB00401 Normally Closed 230v Actuator
