Midland Industries PSP-666-68-W 3/8 Compression X 1/2 Fpt Adapter

Product Description

The MIDLAND INDUSTRIES PSP-666-68-W is a brass compression-to-female pipe thread adapter designed to transition a 3/8-inch compression line to a 1/2-inch FPT fitting. It includes an integrated washer to support a reliable, leak-resistant seal at the compression connection. This fitting is used in plumbing and HVAC supply systems where a compression tube must terminate into a female-threaded port. Licensed plumbers and HVAC technicians install this type of adapter during fixture supply line connections, appliance hookups, and system modifications requiring a thread-to-compression transition.

This adapter fits residential and light commercial plumbing applications where 3/8-inch OD compression tubing meets a 1/2-inch female pipe thread port. Typical install scenarios include under-sink supply connections, water heater service lines, ice maker supply runs, and similar low-pressure domestic water or gas appliance supply situations. The compact body dimensions keep the fitting unobtrusive in tight-clearance spaces such as cabinet interiors and appliance compartments.

Key Features

• 3/8-inch compression inlet transitions to 1/2-inch FPT outlet for mixed-connection installations
• Brass construction provides corrosion resistance suitable for water and compatible gas service
• Included washer supports a leak-resistant seal at the compression end without additional components
• Compact body at approximately 0.75 inches in length fits in confined spaces
• Female Adapter category fitting - accepts male-threaded ports or valves on the FPT side

Compatibility

Designed as an OEM-style replacement or new-installation brass compression female adapter for residential and light commercial plumbing systems using 3/8-inch compression tubing and 1/2-inch female pipe thread connections.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable IPC or local plumbing code requirements. Shut off the water supply and relieve line pressure before removing or installing any compression fitting. Hand-tighten the compression nut first, then snug with a wrench - do not overtighten, as brass fittings can crack under excessive torque. Inspect the washer for proper seating before final tightening and pressure-test the connection after service.