Midland Industries 00566-0402 Brass Coupling 1/4 Comp X 1/8 Fpt

Product Description

The MIDLAND INDUSTRIES 00566-0402 is a brass compression-to-female pipe thread coupling designed to transition a 1/4-inch compression connection to a 1/8-inch female pipe thread (FPT) port. This fitting is used to create a leak-resistant mechanical joint between copper or plastic tubing and a threaded fitting, valve, or instrument port. Brass construction provides corrosion resistance and durability in wet or humid service environments. The compression end accepts tubing without soldering or flaring, making it a practical choice for field connections. Plumbers, HVAC technicians, and refrigeration service pros install this type of fitting during equipment hookups, instrumentation taps, and control-line connections.

This coupling is suited for residential and light commercial plumbing, HVAC control lines, and refrigeration applications where a transition from compression tubing to a small female pipe thread port is required. Typical installations include connecting small-diameter copper or nylon tubing to pressure gauges, solenoid valves, or manifold ports with 1/8-inch NPT female threads. Its compact profile fits in tight spaces where larger fittings are not practical.

Key Features

• Brass construction for corrosion resistance in plumbing and HVAC environments
• 1/4-inch compression inlet accepts tubing without soldering or flaring
• 1/8-inch FPT outlet connects directly to standard NPT-threaded ports
• Compact dimensions - 1 inch length, 0.5 inch width, 0.45 inch height - for tight-space installs
• Lightweight at 0.035 pounds, minimizing stress on small tubing runs

Compatibility

Designed as an OEM-style replacement or new-installation fitting for plumbing, HVAC, and refrigeration systems requiring a 1/4-inch compression to 1/8-inch female pipe thread transition in brass.

Installation Notes

Installation is performed by licensed plumbers or qualified HVAC technicians. Shut off the water or refrigerant supply and relieve system pressure before beginning work. Ensure tubing is cut cleanly and squarely before seating it into the compression end; do not over-tighten the compression nut, as brass fittings can crack under excessive torque. Apply thread sealant or PTFE tape to the FPT threads in accordance with local plumbing codes and the fitting manufacturer guidelines.