Midland Industries 19190 Brass Compression Adapter

Product Description

The MIDLAND INDUSTRIES 19190 is a brass male adapter fitting designed to transition a 3/8-inch compression connection to a 1/2-inch male NPTF thread. This fitting is used in plumbing and HVAC applications where a compression tube line must terminate or connect into a female NPTF port on a valve, manifold, or fixture. Constructed from brass, the 19190 provides reliable sealing under typical service pressures found in residential and light commercial systems. Its compact size makes it suitable for installations in confined spaces. Licensed plumbers and HVAC technicians are the primary installers of this type of fitting.

This adapter is suited for use in water supply, refrigeration, or gas-compatible compression line assemblies where a transition to a 1/2-inch NPTF male threaded connection is required. The compression end accepts standard 3/8-inch OD tubing. The NPTF thread form is designed for pressure-tight joints without requiring additional sealant, though practices vary by application and local code. Typical install locations include under-sink supply connections, appliance shutoff valve outlets, and similar service points in residential and light commercial plumbing systems.

Key Features

• 3/8-inch compression inlet transitions to 1/2-inch male NPTF outlet
• Brass construction for corrosion resistance and durability in wet service environments
• NPTF thread form provides a pressure-tight mechanical seal
• Compact dimensions suit tight-space installations
• Single-piece adapter body - no separate sleeve or insert required beyond standard compression components

Compatibility

Designed as an OEM-style brass compression male adapter for use with standard 3/8-inch OD compression tubing and 1/2-inch female NPTF threaded ports in residential and light commercial plumbing and HVAC systems.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the supply line before disassembly or installation. Ensure the compression nut and ferrule are seated correctly on the tubing before tightening - do not overtighten, as brass fittings can be damaged by excessive torque. Verify thread compatibility before assembly, as NPTF and NPT threads differ in their sealing mechanism.