Midland Industries 700068-0402AOP Compression Adapter

Product Description

The MIDLAND INDUSTRIES 700068-0402AOP is a lead-free brass compression adapter designed to connect 1/4-inch compression tubing to a 1/8-inch male NPTF threaded port. This fitting transitions between two common connection types in a single compact body, making it a practical choice for plumbing, refrigeration, and instrumentation lines where copper, aluminum, or plastic tubing meets a threaded fitting. The lead-free brass construction meets modern potable-water compliance standards. Thread specifications are 7/16-24 on the compression side and 1/8-27 NPT on the male thread side. Licensed plumbers and HVAC technicians are the primary installers for this type of fitting.

This adapter is suited for residential and light commercial applications where a compression tubing line must terminate at a threaded port. Typical scenarios include water supply connections, gas appliance supply lines, pneumatic control circuits, and refrigeration sensing lines. The fitting accepts copper, aluminum, or plastic tubing on the compression side, giving installers flexibility across multiple system types. Its compact footprint - 1.15 inches in height and 0.45 inches in width - allows installation in tight spaces without special tooling.

Key Features

• Lead-free brass construction meets current regulatory requirements for potable water applications
• Connects 1/4-inch compression tubing to a 1/8-inch MNPTF threaded port in a single fitting
• Compatible with copper, aluminum, and plastic tubing on the compression side
• Operating temperature range of -40 to 250 degrees F suits a wide range of service conditions
• Compact body at 1.15 inches tall and 0.45 inches wide fits confined installation spaces
• Thread dimensions of 7/16-24 compression and 1/8-27 NPTF ensure correct thread engagement

Compatibility

Designed for use with copper, aluminum, or plastic tubing on the compression side and any 1/8-inch MNPTF threaded port. Suitable as an OEM-style replacement or new-installation fitting in compression-to-NPT plumbing and mechanical systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable plumbing codes such as the IPC. Shut off the water or fluid supply and relieve system pressure before removing or installing any compression fitting. Hand-tighten the compression nut first, then apply a measured additional turn with a wrench - do not overtighten, as brass compression fittings can crack or deform the ferrule if over-stressed. Inspect the tubing end for squareness and burrs before assembly to ensure a leak-free seal.