Eff 109666-lf Brass Tee Fitting 3/4 Inches Pex X 3/4 Inches Pex X 3/4 Inches Pex

Product Description

The EFF 109666-lf is a brass tee fitting designed for PEX piping systems. It connects three 3/4 inch PEX lines in a tee configuration, making it a core component in residential and commercial plumbing installations. Plumbers and pipefitters rely on this type of fitting when splitting or combining water flow across multiple lines. The three-way tee layout allows one supply line to branch into two directions, or two lines to merge into one, depending on system design. All three ports are sized at 3/4 inches and use standard PEX connection types, so the fitting integrates cleanly into existing PEX networks without adapters or reducers. Brass construction is a preferred choice for water distribution fittings because it resists corrosion, handles a wide range of water temperatures, and maintains structural integrity under standard line pressure. Brass also meets lead-free compliance requirements when specified, making it suitable for potable water applications. The 109666-lf is well suited for use in hot and cold water supply lines, hydronic heating loops, and radiant floor heating systems where PEX tubing is the primary pipe material. Its uniform 3/4 inch port sizing across all three connections simplifies layout planning and reduces the need for additional transition fittings. Trade professionals working on new construction or retrofit plumbing projects will find this fitting compatible with major PEX expansion and crimp systems. The solid brass body provides dependable long-term performance in both concealed and accessible installations.

• Three-way tee fitting with all ports sized at 3/4 inches for balanced flow distribution
• Full brass construction provides corrosion resistance and durability in potable and hydronic water systems
• Compatible with standard PEX connection methods used in residential and commercial plumbing

Product Highlights

The EFF 109666-lf brass PEX tee fitting delivers reliable three-way flow distribution in 3/4 inch PEX plumbing systems. Its all-brass construction supports long service life in both potable water and hydronic heating applications.

Product Information

Standard Information

• Brand: EFF
• Manufacturer Part Number: 109666-lf

Technical Specifications

• Fitting Type: Tee
• Material Construction: Brass
• Connection Size 1: 3/4 inches
• Connection Type 1: PEX
• Connection Size 2: 3/4 inches
• Connection Type 2: PEX
• Connection Size 3: 3/4 inches
• Connection Type 3: PEX
• Connection Type: PEX x PEX x PEX