About Poly PEX Expansion Fittings

Poly PEX expansion fittings are a reliable and cost-effective solution for connecting PEX-A tubing in residential, commercial, and radiant heating applications. Designed for use with the PEX expansion connection method, these fittings are fully compatible with leading Uponor expansion PEX systems and are manufactured to ASTM F1960 standards. Whether you’re a professional plumber or a DIY installer, poly PEX-A fittings ensure durable, leak-free, and corrosion-resistant performance across a variety of plumbing projects.

At Plumbingsell, we supply a complete range of PEX-A expansion fittings, pipe couplers, pipe connector fittings, and poly pipe fittings from trusted brands, providing everything you need for secure and long-lasting PEX plumbing systems.

Why Choose Poly PEX Expansion Fittings?

Superior Material – PPSU Polymer

Our poly PEX fittings are made from high-quality PPSU polymer, which offers excellent resistance to high temperatures, pressure, and aggressive water conditions. It’s inherently lead-free and NSF-certified for potable water.

Unlike brass fittings, poly PEX expansion fittings are not prone to dezincification or corrosion. They maintain dimensional stability and strength under extreme conditions, providing a dependable connection for both cold and hot water lines.

Types of PEX Expansion Fittings Available

• PEX Couplings / Pipe Couplers: For connecting two pieces of PEX-A tubing securely.
• PEX Elbows: Allowing smooth directional changes in tight spaces.
• PEX Tees: For branching out water lines efficiently.
• PEX Adapters & Connectors: Used to join PEX-A pipe with other materials such as copper, CPVC, or threaded pipe.
• PEX Manifolds & Valves: For customized water distribution control.

Whether you’re working with expanding PEX fittings, pipe connector fittings, or poly pipe couplings, our collection ensures top performance and reliable sealing every time.

Shop Poly PEX Expansion Fittings Online at Plumbingsell

At Plumbingsell, we carry a full inventory of PEX-A expansion fittings, pipe couplings, and PEX plumbing parts compatible with top systems such as Uponor, Rehau, and Mr. PEX. Whether you need F1960 PEX fittings, PEX expander fittings, or PEX A parts, you’ll find them all here at competitive wholesale prices.

We’re committed to helping contractors and homeowners alike find the right PEX plumbing components for any job — from large-scale commercial installations to small home renovations. Our fittings are backed by quality assurance and designed for long-lasting, leak-free performance.