These pex installation basics will get you well on your way to a great residential water distribution system.
Would you like a home water distribution system that you can count on not to corrode or develop small leaks, one that is chlorine-resistant, resists scale build-up, uses less fittings, connections, and elbows when compared to rigid plastic and metallic pipe? Then check out using cross-linked polyethylene (PEX) in the next water supply system you install.
Introduction
Size & Color
PEX tubing has been approved for drinking water hot and cold plumbing systems and hot-water (hydronic) heating systems in all model plumbing and mechanical codes across the U.S. and Canada. PEX tubing systems are durable, provide security for safe drinking water, and use reliable connections and fittings. To date you will find about ten domestic producers of high quality PEX tubing.
Two Fittings
Support Bend
In covering PEX installation basics we should first mention that Cross-linked polyethylene (PEX) is considered a high-temp, flexible plastic (polymer) pipe. The cross-linking increases the thermal stability of the material under pressure. As a result, it’s resistance to environmental stress cracks, creep, and slow crack growth are substantially increased when compared to polyethylene.
Manifolds
Brass fittings and couplings and polyethylene tees and elbows are considered the standards. Fittings are available in both mechanical compression and crimping styles, depending on application and manufacturer. Besides being used in domestic water supply systems, PEX tubing has become very popular for both floor or wall radiant heating, as well as ice and snow melting systems in driveways and sidewalks.
Compression Sleeve Fitting
PEX tubing is light weight to handle, and can withstand operating temperatures of up to 200° F (93° C). With its flexible characteristics it can be bent around corners and impediments, and through floor systems. Sizes of PEX tubing range from 3/8-inch to over 2 inches.
