Midland Industries 18151 Brass Compression Adapter

Product Description

The MIDLAND INDUSTRIES 18151 is a brass compression-to-female pipe thread adapter designed to connect 5/16 inch compression tubing to a 3/8 inch FPT fitting or port. It serves as a transition fitting in refrigeration, HVAC, and plumbing systems where copper or aluminum tubing must terminate at a threaded female port. The all-brass construction provides reliable corrosion resistance and durability under typical system pressures. Licensed HVAC technicians and plumbers install this type of adapter when routing tubing to valves, manifolds, or equipment ports that use standard female pipe threads.

This fitting is suited for residential and light commercial applications. Typical install scenarios include connecting refrigerant or condensate lines, ice maker supply lines, and similar small-diameter tubing runs where a compression-to-FPT transition is required. Its compact dimensions make it practical in tight spaces around equipment cabinets and valve assemblies.

Key Features

• 5/16 inch compression inlet connects directly to compatible OD tubing without soldering
• 3/8 inch FPT outlet threads into standard female pipe thread ports
• All-brass body resists corrosion in wet and refrigerant-adjacent environments
• Compact profile at 1.2 inches length and 0.8 inches width for use in confined spaces
• Minimum order quantity of 1 unit for single-piece replacement needs

Compatibility

Designed as an OEM-style replacement compression adapter for systems requiring a 5/16 inch compression to 3/8 inch FPT transition in brass fittings applications.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians following applicable IPC and IFGC guidelines. Shut off the water or refrigerant supply and depressurize the line before removing or installing any compression fitting. Hand-tighten the compression nut first, then snug with a wrench - do not overtighten, as over-compression can deform the ferrule and cause leaks. Apply thread sealant or PTFE tape to the FPT threads per standard practice before making up the connection.