Die cast plumbing and heating specification valves for use in low pressure, domestic potable water systems. Used to prevent back-flow of fluids.

The NK300S Boiler Feed Combination Valve combines a testable back flow preventer with a pressure-reducing boiler fill valve. This feature rich product contains a strainer, pressure gauge, two shutoff ball valves, and test ports to save you time and money. It’s exactly what every residential, light commercial or multi-family building with a boiler needs to speed up installation, checkout, and maintenance visits.