PEX Ball Valves, Adapters & O-Rings

Browse an array of radiant PEX fittings at F.W. Webb. Our collection includes PEX elbow fittings, ball valves, adapters, end caps, couplings, and O-rings; select the right connection method for your heating system. Each fitting is made in brass, a durable material that can stand up to normal everyday use in a radiant heat application. Use our convenient filters to narrow PEX fittings by end connection, size, flow rate, pressure range, and outside diameter. Explore top-quality radiant fittings from trusted makers, including Uponor, Watts Radiant PEX, and Webstone, to find the right fit for your unit.

Frequently Asked Questions

Should I use brass or plastic fittings with PEX?

Brass fittings are preferred over plastic with PEX components; brass offers more strength, resistance to high UV levels, larger flow passage, and easier installation.

What is the difference between PEX A and PEX B fittings?

A PEX A fitting is bigger in diameter, more flexible, and can expand when necessary; a PEX B fitting doesn't need an expansion tool and uses an insert-style fitting.