Rostra Vernatherm are manufacturers of standard and hybrid freeze protection valves. There are two series' available, 35F and 45F, depending on your type of system and fluid volume. Both come in standard with angled body or straight body, and hybrid with angled body.

Therm-Omega-Tech are manufacturers of freeze protection valves for piping, pumps, condensate systems, solar, fire lines and freeze sensitive equipment. Products offered include heat actuated traps, solar freeze protection valves, and solar freeze protection cartridges.

VSI are distributors of freeze protection valves from Flowrite. The Flowrite VF 599 Series are ANSI Class 250 three-way valves. A pump is recommended on the coil circuit for freeze protection. There are 18 globe valve models to choose from with flow rates of 1.0 to 40 Cv (0.85 to 34.40 Kvs).

Solar Freeze Protection, a Vernatherm company, manufactures solar hot water freeze protection valves in Standard (thermal relief only) and Freeze Protection/Pressure Protection (thermal and pressure relief functioning separately) types. Features include discharge temperatures set to 45F (7.22C) or 35F (1.67C), and 1034kpa (10.34 bar 150psi ) maximum operating pressure.

Pathway Control Products are manufacturers of freeze protection valves. Their Series D175 are two way, high pressure, no freeze valves used primarily for oil and gas separators, gas scrubbers and other liquid accumulators. Their Series 400 freeze protection valves are typically used for the same applications but offer a higher working pressure.

Wilson & Associates are manufacturer's reps for Therm-Omega-Tech freeze protection valves. Products include Model HAT/FP valves with 300 psig (20.7 bar) (2068 k Pa), and Model IC/FP freeze protection valves that open when water is in danger of freezing (open at 35 F and closed at 40 F).

Watson McDaniel are manufacturers of WFPV freeze protection valves used on valves, pipes, pumps, fittings, safety showers, condensate systems, spray nozzles, fire lines, and other freeze sensitive equipment. These stainless steel valves offer maximum water capacity of 4,950 lbs/hr.

Atmo-Seal Engineering, Inc. manufactures custom freeze protection valves/filters and can also customize your filters to your exacting specifications.

Bradley are manufacturers of freeze protection valves that activate at 45 F (7 C), protect pipes from bursting, and compliment thermostatic mixing valves.

Ogontz are manufacturers of freeze and scald protection valves.

Encon Safety Products are manufacturers of 1/2" automatic freeze protection valves.