Midland Industries 20986P 3-way Stop Adapter Valve

Product Description

The MIDLAND INDUSTRIES 20986P is a 3-way stop adapter valve designed for low-pressure water supply lines in residential plumbing applications. Built with a polypropylene body and EPDM seal, it handles working pressures up to 170 psi. The valve features a quarter-turn operation for fast shutoff and combines two connection types on a single fitting: compression on the run ports and a push-in connection on the branch port. The nominal size is 3/8 inch. Licensed plumbers and experienced DIYers typically install this fitting when a tee-style stop valve is needed to branch off an existing supply line without cutting into copper or CPVC.

This valve suits residential under-sink installations, toilet supply lines, and similar low-pressure domestic water service scenarios where a branch connection is needed at the shutoff point. Its push-in branch port speeds up installation where a quick-connect termination is preferred over a second compression fitting. The white polypropylene body is suited to visible or semi-visible installations where aesthetics matter alongside function.

Key Features

• Quarter-turn ball-style shutoff for quick open and close operation
• Compression connections on the run ports accept standard 3/8-inch compression tubing
• Push-in branch port for tool-free quick-connect installation
• Polypropylene body with EPDM seal for corrosion resistance in potable water service
• Rated to 170 psi working pressure
• 9/16-24 thread size for compatibility with standard stop valve fittings

Compatibility

Designed as an OEM-style replacement or new-installation fitting for residential plastic push-in and compression plumbing systems using 3/8-inch nominal supply lines.

Installation Notes

Installation should be performed by a licensed plumber or qualified technician in accordance with local plumbing codes and the IPC. Shut off the main water supply and relieve line pressure before removing any existing fitting. Compression fittings require proper seating of the ferrule - do not overtighten, as polypropylene threads can crack under excess torque. Verify the push-in branch port tubing is fully inserted and locked before restoring water pressure.