Midland Industries 18203NP 7/8 X 3/4 Nptf Compression Adapter

Product Description

The MIDLAND INDUSTRIES 18203NP is a male adapter fitting that connects a 7/8-inch compression end to a 3/4-inch Male NPTF threaded port. Constructed from nickel-plated brass, this adapter is rated for service up to 75 psi and handles temperatures from -65 to 250 degrees F. The compression side uses a 1-1/8-18 thread interface while the NPTF side is 3/4-14 thread. Plumbers, HVAC technicians, and refrigeration mechanics use this adapter to transition between compression tubing runs and NPT-threaded equipment or fittings in a single connection.

This adapter is suited for residential and light commercial plumbing, refrigeration, and fluid-transfer applications where copper, aluminum, or thermoplastic tubing must terminate at a threaded male NPTF port. It is a common fitting in gas appliance connections, refrigerant line sets, and hydraulic fluid circuits operating within the rated pressure and temperature envelope. The nickel plating provides corrosion resistance in environments where bare brass may be susceptible to oxidation or chemical exposure.

Key Features

• 7/8-inch compression inlet connects to copper, aluminum, or thermoplastic tubing without soldering
• 3/4-inch Male NPTF outlet seals on thread form for pressure-tight connections
• Nickel-plated brass construction offers corrosion resistance over standard bare brass
• Rated to 75 psi working pressure
• Wide temperature range: -65 to 250 degrees F suits refrigeration and heating applications
• Thread sizes: 1-1/8-18 compression x 3/4-14 NPTF

Compatibility

Designed for use with copper, aluminum, and thermoplastic tubing on the compression side, and any standard 3/4-inch Male NPTF-threaded port on the outlet side.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC or refrigeration technician in accordance with applicable IPC or IFGC guidelines. Shut off and depressurize the fluid or gas line completely before disassembly or fitting installation. Tighten the compression nut by hand first, then apply a modest additional turn with a wrench - do not overtighten, as this can crack the compression sleeve or deform the tubing. NPTF threads are self-sealing on the thread form; confirm proper thread engagement before pressurizing the system.