Midland Industries 18154L Light Pattern Adapter Brass

Product Description

The MIDLAND INDUSTRIES 18154L is a light pattern brass adapter fitting that connects a 3/8-inch compression end to a 3/8-inch female NPT (FNPTF) threaded port. The compression side accepts copper, aluminum, and thermoplastic tubing, making it a versatile choice for plumbing, HVAC, and refrigeration line work where a compression-to-pipe-thread transition is required. Rated to 200 psi and a temperature range of -65 to 250 degrees F, this fitting handles demanding service conditions. The 3/4-inch hex provides a solid wrench grip during installation. Thread specification is 9/16-24 on the compression side and 3/8-18 NPT on the female threaded end.

This adapter is suited for residential and light commercial plumbing and mechanical systems where copper, aluminum, or thermoplastic tubing must terminate at a female NPT port. Common applications include water supply lines, refrigerant accessory circuits, pneumatic lines, and gas appliance connections where compression fittings are code-acceptable. The 1.03-inch center-to-end dimension keeps the installed profile compact in tight spaces, and the brass construction resists corrosion in both wet and dry service environments.

Key Features

• 3/8-inch compression x 3/8-inch FNPTF configuration for quick tubing-to-threaded-port transitions
• Rated to 200 psi working pressure
• Operating temperature range: -65 to 250 degrees F
• Compatible with copper, aluminum, and thermoplastic tubing
• 3/4-inch hex for standard wrench installation
• Compact 1.03-inch center-to-end dimension for tight installation spaces
• Brass construction for corrosion resistance in wet and mechanical service

Compatibility

Designed for use with copper, aluminum, and thermoplastic tubing on 3/8-inch compression systems terminating at a 3/8-inch female NPT port. Thread specification is 9/16-24 compression x 3/8-18 FNPTF.

Installation Notes

This fitting is typically installed by licensed plumbers or HVAC-R technicians. Shut off the water supply or system pressure and relieve all line pressure before disassembly or installation. Hand-tighten the compression nut onto the tubing, then snug with a wrench - do not overtighten, as excessive force can distort the compression sleeve and cause leaks. Apply appropriate thread sealant to the FNPTF connection per local plumbing code requirements.