PEX Products

PEX Heating

PEX Plumbing

PEX Tubing

PEX Tubing is the flexible material used in Radiant Heat and Hydronic Heating Systems

PEX Fittings

PEX Fittings are used to make PEX to PEX Connections, to connect PEX to a manifold, &

Radiant Heat Manifolds

Manifolds play an important role in Radiant Heat applications. Manifolds are the pla

PEX Tools

This category includes all of the tools needed for Radiant Heat. These PEX Tools incl

Radiant Heat Controls

Radiant Heat Controls include actuators, thermostats, and zone valves. These radiant

Radiant Heat Panels

Radiant Heat Panels will improve the efficiency of a radiant heat system. These pane

Radiant Heat Insulation

Insulation lowers the heat loss of a Radiant Heating System. Therefore in the long r

Radiant Heat Install Parts

Installation accessories include the items needed to install PEX Tubing for Radiant H

PEX Tubing

PEX Tubing is widely used to replace copper in plumbing applications. Typically, red

PEX Fittings

PEX Fittings are used to make PEX to PEX Connections, to connect PEX to a manifold, &

PEX Manifolds

PEX Plumbing Manifolds should be used to ease the installation of PEX Plumbing system

PEX Tools

This category includes all of the PEX Tools needed for PEX Plumbing. These include th

Installation Parts

Installation accessories are the items needed to aid in the installation of PEX Tubin

PEX Plumbing Packages

Looking for a great PEX Plumbing kit? Well, here you can find four handy starter kits


About PEX

PEX stands for cross-linked polyethylene. It is a type of plastic tubing used in both plumbing and heating applications. PEX has been installed in Europe for over 30 years, and its use has become widespread in the United States over the last 10 to 15 years. Because of its ease of installation, reliability, and relatively low cost, PEX is continuously growing in popularity. It is more flexible, stands up to freezing better, and is less expensive than copper and CPVC pipe.

Types of PEX

PEX is manufactured in three different grades: PEX-a, PEX-b, and PEX-c. Each differs in the way it is produced: PEX-a is made using the Engel method and is the strongest, most uniform, and most flexible out of the three. PEX-b is made using the Silane method and has the same properties as PEX-a after installation. PEX-c is made using the electronic beam method, which is the most environmentally friendly method out of the three.

PEX Applications

PEX is great for use in hydronic or radiant heat systems, withstanding temperatures as high as 200 degrees. PEX tubing is widely used as an alternative to copper piping in plumbing systems. To differentiate between hot and cold lines, PEX comes in red and blue colors. PEX for heating typically contains an oxygen barrier to prevent the rusting of ferrous system components. It is available in sizes ranging from 1/4" to 4" (1/2" and 3/4" are the most common), with larger-sized tubing becoming more popular as the fittings and tools have become more readily available. PEX also comes in coils ranging from 100' to 2000' and comes in straight lengths generally between 10' and 20'. Additionally, PEX can be buried in a slab or underground, making it extremely versatile and adaptable.

Manifolds are common additions to PEX systems, functioning as the "hub" or centralized location for all of the PEX lines. In radiant heat systems, manifolds act as the distribution points from which loops run. In plumbing systems, there may be one centralized manifold (known as a "Home Run system") or multiple smaller manifolds distributed throughout the residence.

There are several different PEX fitting and tool systems: crimp/clamp, expander, press, and compression. Perhaps the most widely used system is the crimp or clamp system, which utilizes barbed fittings with copper crimp rings or stainless steel clamps. The system most widely used by professionals is the Uponor expander system. The Uponor expander system for connecting PEX uses an expander tool alongside specialized ProPEX fittings. Another popular PEX system amongst trade professionals is Viega's press system. The PEX press system uses press fittings, sleeves, and a PEX press tool. Finally compression fittings, such as Sharkbite fittings, make fast and easy PEX connections.