The Apollo Expansion PEX / Pex A 3/4 in. Expansion PEX to 3/4 in. D FPT Brass Female Adapter is a purpose-built connector for reliable, leak-free PEX installations. Crafted from lead-free brass, this adapter is designed for potable water projects where durability and safety matter most.
-
Lead-free brass body ensures clean, safe water connections and long-lasting performance.
-
3/4" Expansion PEX on one end compatible with PEX-A (Apollo Expansion) tooling for a secure, crimp-free join.
-
3/4" FPT (female pipe thread) on the other end provides a snug, standard threaded connection to 3/4" male pipe fittings or fixtures.
-
Maximum pressure rating up to 200 psi suitable for typical residential water systems.
-
ANSI certified for verified quality and compatibility within modern plumbing schemes.
-
One-piece brass construction minimizes leak paths and resists corrosion in everyday use.
-
Not push-to-connect— a straightforward expansion PEX to threaded connection that leverages familiar pipe threading practices.
-
Package includes 1 adapter ready to integrate into your next PEX-to-pipe retrofit or new-install project.
What makes this adapter stand out
Unlike generic fittings, this brass adapter is engineered specifically for PEX-A expansion systems, preserving the integrity of the expansion process while delivering a robust 3/4" threaded connection. The combination of a 3/4" expansion PEX end and a 3/4" FPT end creates a versatile bridge between modern PEX networks and traditional threaded plumbing, reducing the need for soldering, crimping, or additional adapters.
Ideal use cases
- Retrofits that move from threaded copper or steel lines to PEX-A tubing in 3/4" circuits
- Appliance and fixture connections requiring a 3/4" threaded inlet or outlet
- Residential water distribution where a reliable, lead-free brass interface is preferred
- Installations where you want a durable, code-compliant connection between PEX-A and standard pipe threads
Practical installation notes
Prepare both ends: cut and deburr the PEX-A tube, and ensure the 3/4" male pipe thread is clean and properly sized. Use the Apollo expansion tool to create a secure PEX end, then insert into the expansion side of the adapter. Thread the FPT end onto the corresponding 3/4" male pipe fitting, using appropriate plumbing tape to seal threads. After installation, verify for leaks and perform a pressure test within your system’s guidelines.
