Parker 12M-C12L-1-SS Check Valve 3/4 Inch Ss Mnpt

Product Description

The PARKER 12M-C12L-1-SS is a 3/4-inch inline check valve rated at 6,000 WOG (water, oil, gas), built entirely from stainless steel — body and spring — for demanding fluid and gas control applications. It uses male NPT connections on both ends (MNPT x MNPT), allowing straightforward inline installation with standard threaded pipe fittings. The all-stainless construction resists corrosion in aggressive media, making this valve suitable for systems where carbon steel components would degrade. Licensed plumbers, pipefitters, and industrial technicians are the primary installers for this type of fitting.

This check valve is designed for inline service on 3/4-inch threaded pipe systems handling water, oil, or gas at high working pressures. It is well suited for commercial and industrial plumbing, compressed air lines, hydraulic systems, and process piping where backflow prevention is required and corrosion resistance is a priority. The MNPT x MNPT end connections integrate with standard NPT-threaded pipe, fittings, and valves already in service in most mechanical systems.

Key Features

• 6,000 WOG pressure rating for high-demand water, oil, and gas service
• All stainless steel body and spring construction for corrosion resistance
• 3/4-inch pipe size with MNPT x MNPT end connections for standard threaded installation
• Inline valve design allows installation directly in the pipe run without offset fittings
• Single-piece package quantity — no mandatory multi-unit purchases

Compatibility

Designed as an OEM-style replacement or new-installation inline check valve for 3/4-inch NPT-threaded pipe systems in plumbing, process, and industrial applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable local codes and the International Plumbing Code (IPC) where required. Depressurize and drain the line completely before removing any existing valve or fitting. Apply thread sealant or PTFE tape to the male NPT threads per standard practice — do not overtighten, as stainless steel threads can gall. Verify flow direction marking on the valve body before final tightening.