Anvil 4371000520 Check Valve 1/2 Inch Fnpt X Fnpt SS316

Product Description

The ANVIL 4371000520 is a 1/2 inch stainless steel check valve designed to allow one-directional flow and prevent backflow in piping systems. Constructed from 316 stainless steel, this valve is well suited to corrosive or high-purity service environments where carbon steel is not acceptable. Both end connections are female NPT (FNPT x FNPT), allowing straightforward threaded installation into standard pipe runs. This is a lead-free valve, making it compliant with applicable potable water regulations. Plumbers, pipefitters, and mechanical contractors install this type of valve in water supply, chemical, and process piping applications.

This check valve is used in residential and light commercial plumbing systems as well as industrial process piping where backflow prevention is required. The 316 stainless steel body handles mild corrosives, salt water exposure, and sanitary process lines where iron or brass fittings are not suitable. FNPT threaded connections make it compatible with standard 1/2 inch pipe installations without the need for specialized tooling or fittings.

Key Features

• 316 stainless steel body for corrosion resistance in demanding service environments
• 1/2 inch FNPT x FNPT connections for standard threaded pipe installation
• Lead-free construction for compliance with potable water codes
• One-directional flow design prevents backflow without manual operation
• Manufactured under ISO 9001:2008 quality standards

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1/2 inch threaded pipe systems using FNPT connections in plumbing, process, and mechanical piping applications.

Installation Notes

Installation is performed by licensed plumbers or pipefitters working with threaded pipe systems. Shut off and depressurize the line before removing any existing valve or fitting. Apply appropriate thread sealant tape or compound to male threads before make-up, and confirm flow direction arrow or internal orientation matches intended flow before tightening. Work must comply with applicable local plumbing codes and IPC requirements for backflow prevention devices.