Milwaukee Valve 508-114 Bronze Check Valve 1-1/4 in Npt

Product Description

The MILWAUKEE VALVE 508-114 is a bronze swing check valve with threaded NPT end connections, rated at 400 WOG (water, oil, gas). Built to ASTM B61 material grade and conforming to MSS SP-80, this valve is designed for inline installation in piping systems where backflow prevention is required. It opens at a crack pressure of 0.50 psi and handles operating pressures from 5 psi up to full WOG rating. The all-bronze body and bronze seal construction make it suitable for service in gas, oil, and water systems. Licensed plumbers and pipefitters are the primary installers for this type of valve in both commercial and industrial piping applications.

This check valve is suited for use in residential and light commercial plumbing, hydronic heating, fuel oil, and gas distribution piping where a reliable, low-cracking-pressure non-return device is needed. Its 1-1/4 inch NPT threaded connections allow direct makeup into standard threaded pipe assemblies. The valve is rated for service from -20 degrees F to 550 degrees F, covering a wide range of fluid temperatures encountered in typical mechanical room and inline piping applications.

Key Features

• 400 WOG pressure rating suitable for water, oil, and gas service
• All-bronze body and seal construction per ASTM B61 material grade
• Low crack pressure of 0.50 psi allows operation in low-differential systems
• Threaded NPT end connections for straightforward installation into existing pipe runs
• Wide temperature range: -20 degrees F to 550 degrees F
• Conforms to MSS SP-80 standards for bronze gate, globe, angle, and check valves

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1-1/4 inch NPT threaded piping systems handling gas, oil, or water service.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and IFGC requirements where gas service is involved. Shut off and depressurize the piping system completely before removing or installing the valve. Apply thread sealant or PTFE tape rated for the service medium to all NPT connections before makeup. Verify flow direction arrow on the valve body before final installation to ensure correct orientation for backflow prevention.