Apollo Expansion PEX / Pex A 1 in. Expansion PEX to 3/4 in. Brass Coupling delivers a precise, leak-free transition between a 1" expansion PEX A line and a 3/4" PEX run, ideal for dependable home plumbing and radiant heating projects.
Crafted in lead-free brass, this coupling is built to handle the demands of everyday water use while preserving water quality and system longevity. It’s a true expansion PEX coupling: one end accepts 1" PEX A expansion tubing, the other end accepts 3/4" PEX tubing.
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Material: Lead-free brass with a robust expansion mechanism
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Connection types: 1" expansion PEX A on the input side, 3/4" PEX on the output side
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Pressure/temperature rating: Up to 200 psi and up to 200°F (93°C)
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Certification: ANSI certified piece, meeting plumbing standards
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Packaging: Sold in a bagged, 1-piece package for easy handling
This coupling is designed for use in residential plumbing, water supply lines, and radiant floor heating systems where a seamless 1" expansion PEX A to 3/4" PEX transition is needed without crimp rings or push-to-connect fittings. Its compact brass body provides a durable, corrosion-resistant connection that maintains flow and minimizes the risk of leaks at joints.
Why choose expansion PEX with a brass coupling? Expansion PEX A offers a smooth, reliable seal as the tube expands into the fitting, reducing stress on the pipe and connections compared with alternative methods. The brass construction adds strength and longevity, resisting scale buildup and providing dependable performance over time.
Installation at a glance
- Cut and deburr the PEX A and PEX tubing ends to be clean and square.
- Use the Apollo expansion tool to expand the 1" PEX A end to accommodate the brass coupling’s expansion seat.
- Insert the 3/4" PEX end fully into the opposite side until seated.
- Perform a pressure test to verify a leak-free joint before the system is brought online.
Ideal for DIY enthusiasts upgrading existing piping or professional installers seeking a reliable, code-compliant transition piece. Whether you’re replacing aging lines or routing new supply runs, this Apollo brass coupling provides a stable, code-aligned solution that performs under the pressure and temperature demands of typical household systems.
