The LDR Industries 1/2" M.I.P. x 3/4" Hose Heavy-Duty Brass Boiler Drain Valve comes with neoprene seal disc. LDR offers a complete line of high quality valves to fit a wide variety of applications and connection types. All valves meet ANSI standards and ASTM standards and are 100% pressure tested. Our valve program is color coded for ease of shopping by the consumer. An LDR hose end brass valve is generally used for irrigation purposes. LDR boiler drains are commonly used as water heater drain they also supply laundry tub. They have a garden hose connection outlet and allow for flow of water to be controlled. They come in threaded connections.