The Apollo Expansion PEX / Pex A 1/2 in. Expansion PEX to 1/2 in. D PEX Brass Tee is a lead-free brass plumbing fitting designed for expansion-style PEX connections. It combines two 1/2 in. expansion PEX ports with a 3/4 in. PEX A barb branch, enabling a clean, reliable branch from a 1/2 in. run to a larger 3/4 in. output. Built for hot and cold water, this tee is engineered to perform under real-world home plumbing conditions.
Key features and benefits
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Lead-free brass construction delivers durable, corrosion-resistant performance for residential water supply.
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Expansion PEX A technology on all ends (End 1: 1/2 in, End 2: 1/2 in, End 3: 3/4 in) provides a secure, clamp-free connection that’s easy to install and inspect.
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Two 1/2 in. expansion ports plus a 3/4 in. expansion PEX A barb branch
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Maximum pressure 200 psi and maximum temperature 200°F, suitable for typical domestic hot water and cold water distribution
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ANSI Certified for compliance and compatibility within standard PEX systems
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Single-piece packaging with reliable, ready-to-use performance
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Push-to-connect not required—designed for expansion-based installations that minimize fittings and potential leakage points
Ideal use cases
This brass tee is perfect when you need to split a 1/2 in. PEX run to a 3/4 in. branch in a home plumbing project. Examples include:
- Branching a hot water line to feed a 3/4 in. fixture line while keeping the main run at 1/2 in.
- Retrofits where you’re upgrading an older 1/2 in. PEX circuit to serve a larger 3/4 in. branch without re-piping the entire run
- New installations in radiant heating or domestic water systems that rely on expansion PEX A connections for a secure, durable join
Installation tips
- Cut and deburr each PEX end to ensure a clean seating surface for expansion.
- Use the appropriate expansion tool to expand each 1/2 in. PEX A end to its respective size before inserting onto the brass tee ends.
- Fully insert each PEX segment onto the corresponding end and verify the seating by gently tugging on the tubing.
- After installation, gradually restore water pressure and check for leaks at all three ends. If needed, re-expand and reseat to ensure a snug fit.
Why this Apollo tee stands out
- Lead-free brass delivers long-term reliability in drinking-water systems, resistant to corrosion and wear.
- Expansion PEX A compatibility means a uniform joint diameter and fewer potential leak points compared with some crimp or push-to-connect options.
- The 1/2 in. to 3/4 in. configuration simplifies branching on existing layouts, reducing the number of fittings and potential failure points.
- Solid ANSI certification and a compact, bagged package make installation straightforward for both DIY renovators and professional plumbers.
Whether you're upgrading a residential plumbing run or planning a new installation, the Apollo Expansion PEX / Pex A Brass Tee gives you a dependable, easy-to-install bridge between a 1/2 in. PEX main and a 3/4 in. branch—combining performance, safety, and durability in a single, well-engineered fitting.
