Midland Industries 18091 Bulkhead Union 1/2in Compression Brass

Product Description

The MIDLAND INDUSTRIES 18091 is a brass bulkhead union fitting designed to create a leak-tight connection through a panel, wall, or tank wall using compression fittings on both sides. Both connection ports accept 1/2 inch compression tubing, making installation straightforward without soldering or special tooling. The fitting is rated for up to 200 psi and performs across a temperature range of -65 to 250 degrees F. Constructed from brass, it resists corrosion in wet and moderate-chemical environments. The 11/16-20 thread secures the fitting through a bulkhead panel, and the 0.82 by 0.875 inch hex provides a wrench flat for tightening. At approximately 0.225 pounds, it is a compact, durable component suited for plumbing, instrumentation, and fluid-handling installations.

This bulkhead union is used wherever tubing must pass through and terminate at a panel, enclosure wall, reservoir, or manifold. Typical applications include refrigeration and HVAC equipment panels, pneumatic and hydraulic instrument enclosures, water treatment systems, and light industrial fluid-handling assemblies. The compression-on-both-ends configuration suits copper or compatible plastic tubing runs where a fixed panel penetration point is required. It is installed by licensed plumbers, HVAC technicians, and industrial maintenance trades.

Key Features

• Dual 1/2 inch compression connections for tool-minimal installation with no soldering required
• Brass construction provides corrosion resistance in wet and moderate-chemical service environments
• Rated to 200 psi working pressure for reliable performance in pressurized fluid and gas lines
• Wide service temperature range of -65 to 250 degrees F suits both refrigeration and hot-water applications
• 11/16-20 thread with 0.82 by 0.875 inch hex allows secure panel mounting and wrench tightening
• Compact overall length of 1.92 inches fits tight panel installations with minimal clearance

Compatibility

Designed as an OEM-style replacement or new-installation bulkhead union for systems using 1/2 inch compression tubing connections through a panel or enclosure wall.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician in accordance with applicable IPC or IFGC guidelines. Shut off and depressurize the supply line completely before removing or installing any compression fitting. Use two wrenches when tightening - one to hold the bulkhead body stationary at the hex flat and one to turn the compression nut - to avoid stressing the panel or distorting the fitting. Do not overtighten compression nuts; snug plus a quarter-turn is the standard field practice for brass compression fittings.