Thermidaire High Pressure & High Capacity, Bi-Metallic Disc, Thermostatic Steam Traps, Small Size With Built-In Y Type Line Strainer, Air Vent & Clog Free Check Valve, Installed In All Positions, Freeze-Proof When Vented Vertically. Steam Traps Eliminate Extra Piping, A Single Installation With Steam Trap, Strainer, Air Vent & Check Valve. VAC To 300 PSI