Eff 104046-lf Brass Pex X Mpt Adapter 1/2 Inch Pex X 3/4 Inch Mpt

Product Description

The EFF 104046-lf is a brass adapter fitting designed to connect 1/2 inch PEX tubing to 3/4 inch male pipe thread (MPT) fittings. This type of transition fitting is a staple in residential and light commercial plumbing systems where PEX supply lines meet threaded metal connections. Plumbers, pipefitters, and mechanical contractors rely on adapters like the 104046-lf to bridge the gap between flexible PEX tubing and threaded brass or iron components such as valves, manifolds, water heaters, and fixture supply stops. The 1/2 inch PEX side accepts standard PEX-A, PEX-B, or PEX-C tubing, making it compatible with the most widely used PEX installation systems in the field. The 3/4 inch MPT end threads directly into female-threaded ports on a wide range of plumbing equipment. Brass construction gives this adapter excellent durability and corrosion resistance, making it suitable for hot and cold potable water applications. Brass fittings are a preferred choice in plumbing because the material holds up well under pressure, resists scale buildup, and maintains a reliable seal over the long term. The 104046-lf is a practical solution for roughing in new construction plumbing, replacing worn fittings in retrofit projects, or completing any job that requires a PEX to MPT transition. Its compact design fits into tight spaces common in wall cavities and mechanical rooms. Trade professionals keeping a well-stocked service van or supply shelf will find this adapter useful across a broad range of residential service calls and new build installations.

• Connects 1/2 inch PEX tubing to 3/4 inch male pipe thread (MPT) fittings in a single fitting
• Solid brass construction provides corrosion resistance and long service life in potable water systems
• Compatible with PEX-A, PEX-B, and PEX-C tubing for broad jobsite versatility

Product Highlights

The EFF 104046-lf brass PEX x MPT adapter delivers a reliable, pressure-rated transition between 1/2 inch PEX supply lines and 3/4 inch threaded connections. Its all-brass construction makes it a dependable choice for potable water plumbing in both new construction and retrofit applications.

Product Information

Standard Information

• Brand: EFF
• Manufacturer Part Number: 104046-lf

Technical Specifications

• Fitting Type: Adapter
• Connection Size 1: 1/2 inch
• Connection Type 1: PEX
• Connection Size 2: 3/4 inch
• Connection Type 2: MPT
• Connection Type: PEX to MPT
• Material Construction: Brass
• Material: Brass