Merit Brass XB112-1206 Brass Reducing Coupling 3/4x3/8

Product Description

The MERIT BRASS XB112-1206 is a brass pipe reducing coupling designed to connect two female pipe threads of different sizes in a single inline fitting. It transitions from a 3/4-inch female BSP tapered (FBSPT) inlet to a 3/8-inch FBSPT outlet, allowing a plumber or pipefitter to reduce pipe diameter without additional adapters. Rated at Class 125, this coupling is suitable for low-to-medium pressure service in water, air, and compatible fluid systems. The all-brass construction provides corrosion resistance and reliable sealing when installed with appropriate thread sealant or PTFE tape. The fitting weighs 0.2365 pounds and ships individually.

This reducing coupling is used in residential and light commercial plumbing, HVAC hydronic lines, compressed air distribution, and general fluid handling applications where a pipe size reduction is needed at a threaded connection point. Its FBSPT x FBSPT end configuration makes it a direct threaded connection — no soldering or crimping required. Licensed plumbers and pipefitters routinely stock this type of fitting for service calls and new installations where line sizing changes are required.

Key Features

• Reduces from 3/4-inch to 3/8-inch female BSP tapered threads in a single fitting
• FBSPT x FBSPT end connections accept standard tapered male pipe threads on both sides
• Class 125 pressure rating suitable for water, air, and compatible fluid service
• Brass construction offers corrosion resistance and long service life in wet environments
• Lightweight at 0.2365 pounds — easy to handle and carry in a service kit

Compatibility

Designed as an OEM-style replacement or new-installation fitting for threaded brass pipe systems using standard BSP tapered thread connections in 3/4-inch and 3/8-inch nominal pipe sizes.

Installation Notes

Installation is performed by a licensed plumber or qualified pipefitter. Shut off and depressurize the line completely before removing or installing any threaded fitting. Apply PTFE tape or a listed pipe thread sealant to the male threads before making up the joint — do not apply sealant to female threads. Hand-tighten first, then wrench-tighten to a snug fit; avoid over-torquing brass fittings, as the material can crack under excessive force.