Price: Contact us for purchase info: (877) 379-8258

SKU: Series 114 (1/2”) Series 115 (3/4”)

Notes: See product sheet for available sizes.

Product Description

The HAT/FP freeze protection valves protects cold water resupply lines from freezing. Utilizing our thermostatic technology, this valve automatically monitors ambient or water temperatures and will bleed off the cold water in the line before freezing temperatures can cause frozen or burst piping.

HAT/FP Product Sheet
HAT/FP Installation and Maintenance Instructions
Ambient Sensing vs. Fluid Sensing Quick Sheet


  • Protects against freeze damage
  • primary protection or fail safe backup
  • Long service life
  • Self-operating
  • Fast response
  • No outside power source required
  • Discharges minimum amount of water required

Design Features

  • Stainless steel body, fittings, spring, and plug
  • Exclusive Thermoloid® thermal actuator
  • Corrosion resistant
  • Narrow temperature band
  • Compact and low mass
  • Two wrench flats for easy installation
  • Ram-type plug for reliable shutoff


The HAT/FP-35 will initiate flow when the thermostatic actuator senses 35°F (1.6°C) and will remain open as long as the discharge water temperature is below 40°F (4.4°C).
In standard flow, the actuator will sense ambient temperature to initiate flow and then respond to water temperature; in reverse flow, the actuator will sense water temperature.

Typical Applications

HAT/FP Freeze Protection Valves Installed on Safety Shower

Relying on manually opening valves for freeze protection allows for human error or plugging of partially cracked valves.  This annually accounts for large amounts of freeze damage resulting in huge monetary loss including repairing damaged equipment, piping, as well as system downtime.

The self-actuating HAT/FP valve eliminates the human errors associated with manual valves. This automatic valve is ideal for the protection of piping, safety showers, solar collectors & piping, condensate systems, fire lines, spray nozzles, or as backup protection on traced systems.

HAT/FP Freeze Protection Valves Installed on Condensate System and Float Trap