Wilkins 14-ZWFR 1/4" Freeze Relief Valve
Designed to prevent freeze damage to backflow preventers
installed above ground in geographical regions subject to occasional
freezing. The model 14-ZWFR senses water temperature
and opens at 35°F to discharge near freezing water from
the backflow device and draw warmer supply water through
the valve. The model 14-ZWFR closes when water temperature
Typical Installation: The Model 14-ZWFR should be installed on the downstream test
cock or downstream attached piping of any backflow device
installed above ground where freezing is a concern.
NOTICE: If the Model 14-ZWFR is installed on a test cock, the
test cock must be left in the open position to allow the 14-ZWFR
to function properly.
The device is best suited to be installed in the vertical down
position, but may also be installed at any orientation up to
horizontal. Orientations above horizontal may cause an ice
dam during operation and impair valve function.
The device is not intended to replace the standard winterization
WARNING: Under freezing conditions the Model 14-ZWFR will
discharge water from the outlet port. Provisions must be
made to insure that discharge will not damage surrounding
property or equipment.
Specifications: The Freeze Relief Valve shall be rated for 175 PSI. The body
shall be cast bronze and the internal spring shall be 300
series stainless steel. The valve shall include a test cock and
open at 35°F and close at 40°F. The Freeze Relief Valve shall
be a ZURN WILKINS Model 14-ZWFR.