Typically freeze protection is effected by cracking open manual bleed valves. This method is at best risky. Human error or plugging of partially cracked valves annually accounts for large amounts of freeze damage to expensive equipment. HAT/FP valves eliminate this type of problem by automating freeze protection, reducing water consumption, and eliminating damage and down time. The unique ram type plug and seat provide reliable, tight shutoff longer than any other design available. All HAT/FP valves are factory-tested and covered by a 36 month prorated warranty.