Author Archives: Matt Borrell
What are manifold plumbing systems?
Manifold, parallel or home-run plumbing systems are much like a breaker box for the electrical system in the home. The manifold provides a common location from which all the plumbing fixtures are supplied. Some high-end manifolds also feature fixture shut-off valves allowing the user to shut off [...]
Is flexible PEX plumbed differently than rigid material plumbing systems?
Yes, the flexibility of PEX allows many directional changes to be made without fittings. PEX systems are sized in the same manner as copper or CPVC CTS plumbing systems. PEX piping is also used in high performance manifold plumbing systems that takes advantage of the flexibility and [...]
What sizes, lengths and packaging options of PEX are available?
PEX is available in 1/4″ through 1″ CTS (Copper Tube Size) and is packaged in coils or 20′ straight lengths. Some manufacturers tubing is color-coded for easy identification of hot and cold lines. Coil lengths generally run to a maximum of 1000′ and are available in a [...]
Where is PEX available?
PEX is available through most plumbing wholesale distributors throughout the United States and Canada. Many retail building supply outlets also supply PEX piping and fittings. Piping and fittings are commonly available in 1/4″ through 1″ CTS (Copper Tube Size) with some manufacturers also supplying larger sizes up [...]
How soon after installation can you pressure test a PEX tubing installation?
Most PEX plumbing systems can be tested immediately after the installation is complete but follow manufacturer’s directions. There is no wait time for glue to dry or joint to cool off. Manufacturer’s instructions should be followed in cold climates.
How are PEX systems tested for leaks?
PEX plumbing and radiant heating systems can be pressure tested using water to check for leaks. Follow manufacturer’s instructions.
What are temperature limitations for PEX?
PEX tubing can be used up to 200° Fahrenheit for heating applications. For plumbing, PEX is limited to 180° F. Temperature limitations are always noted on the print line of the PEX tubing.. PEX systems are tested to and can be used with standard T and P relief valves [...]
How long can PEX be exposed to sunlight?
PEX tubing is not intended for outdoor applications and must be stored in a covered environment not exposed to direct sunlight. Refer to manufacturer’s instructions as to how long your pipe can have UV or sunlight exposure.
What manufacturing methods for PEX are available?
There are currently three methods for producing PEX tubing, the “Engle” or “Peroxide” (PEX-A) method, the “Silane” (PEX-B) method, and the “E-beam” (PEX-C) method…
What is the expected performance of PEX water distribution systems?
PEX is designed and tested to perform as well or better than any other material approved for hot and cold-water distribution systems. For indoor plumbing applications, PEX is expected to perform as long as copper, CPVC or any other approved plumbing distribution materials.



