Watts Radiant Z Series Manifold Differential By-Pass Valve
When just one or two actuators are open, noise from excessive water velocity can result. The Pressure
Differential By-pass Valve for 1 in.Stainless Steel manifolds eliminates possible water velocity noise and water
hammer. With this valve, pumps cannot exceed the actuator close-off pressure. Pump life increases because of
minimal pressure surging as actuators open and close. Correct and constant flow is always ensured regardless of
the number of actuators open.
This Pressure Differential By-pass Valve installs directly on the 1" Stainless Steel manifolds using the same
quick, durable flat-seal connections and supplied unions. This valve adjusts from 0.7 psi (1.6 feet water) to
10.3 psi (23.8 feet water) using a graduated knob. Water by-pass capacity is 1.2 gpm to 9 gpm. The knob is set
and locked with a set screw to prevent tampering.