Anvil 4371000540 Check Valve 1 in Fnpt Stainless 316

Product Description

The ANVIL 4371000540 is a 1-inch stainless steel check valve designed to allow one-directional fluid flow while preventing backflow in piping systems. Constructed from 316 stainless steel, it delivers strong corrosion resistance in demanding service environments. The valve uses female NPT connections on both ends, making it compatible with standard threaded pipe assemblies. It is lead free, meeting requirements for potable water and other regulated applications. Licensed plumbers and pipefitters install this valve in commercial and industrial piping systems where backflow prevention is required and material compatibility is critical.

This check valve is suited for use in plumbing, HVAC hydronic, and industrial process piping systems where 1-inch threaded connections are specified. The FNPT x FNPT end configuration allows direct installation into existing threaded pipe runs without adapters. Its 316 stainless steel body makes it appropriate for mildly corrosive media, saline environments, and potable water service where brass or cast iron would be unsuitable. The lead-free designation supports compliance with applicable safe drinking water regulations.

Key Features

• 316 stainless steel body for superior corrosion resistance in aggressive service conditions
• FNPT x FNPT end connections for straightforward installation into standard threaded pipe systems
• Lead-free construction suitable for potable water and regulated fluid applications
• 1-inch pipe size fits common residential and commercial piping configurations
• Manufactured under ISO 9001:2008 quality management standards

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1-inch FNPT threaded piping systems in plumbing, hydronic, and light industrial applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and the IPC. Shut off and depressurize the affected pipe section before removing any existing valve or fitting. Apply thread sealant or PTFE tape to male threads before making up connections, and verify flow-direction orientation before tightening. Do not use the valve body as a lever or apply excessive torque that could distort the seat or threads.