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Fact 1: PEX was invented in 1968 by German inventor, Dr. Thomas Engel.
Fact 2: PEX was introduced to the European market in 1972 with the Engel-method.
Fact 3: In 1984 the PEX was brought to North America and introduced into the radiant floor heating industry.
Fact 4: There are three different types of PEX made today; PEX-A, PEX-B, and PEX-C
Fact 5: PEX comes in a PEX-AL-PEX option, in which the inside of the tubing is coated in aluminum.
Fact 6: PEX tubing is at least three times cheaper than copper.
Fact 7: PEX is non-corrosive due to being a dielectric material.
Fact 8: PEX-B (Silane method) is the most commonly used, taking 80% of the world’s PEX market.
Fact 9: PEX is BPA (Bisphenol A) free.
Fact 10: PEX has a life expectancy of 50-100 years.
Fact 11: PEX tubing can withstand temperatures of up to 200 degrees Fahrenheit.
Fact 12: PEX tubing is legal across the United States of America.
Fact 13: PEX has great chlorine resistance rating, as a part of the material designation code. With 0 being not tested or rated; and 5 being completely chlorine resistant, most PEX tubing has a 5 rating.
Fact 14: PEX piping minimizes noise due to its flexibility and ability to absorb pressure surges.
Fact 15: PEX tubing is certified by the NSF and CSA to be safe for drinking water.
Fact 16: Currently, PEX holds more than half of the US plumbing pipes market share.
Fact 17: PEX tubing makes watertight, leak-resistant connections without the use of torches, glues, or gauges.
Fact 18: PEX does freeze, however it will extract with the ice and retract when it is thawed.
Fact 19: Linear expansion rate of PEX: 0.93 inch per 10°F per 100 ft. length
Fact 20: PEX piping can only be used for interior use, but it can be buried underground for various applications.
Fact 21: Due to the flexibility of PEX, half as many connections are needed upon installation than water supply systems based on copper piping.
Fact 22: PEX tubing comes color-coordinated in blue (cold), red (hot), and white (neutral).
Fact 23: PEX can be buried in good soil conditions. (Flat with no rocks, hollows, lumps, and sharp objects)
Fact 24: PEX can be buried under concrete.
Fact 25: PEX tubing is made from lead free material.
Fact 26: The Minimum Quick Burst Capability of PEX is 475 psi @ 73.4°F, 210 psi @ 180°F, 180 psi @ 200°F
Fact 27: The Long-term Pressure Ratings of PEX tubing are as follows, 160 psi @ 73.4°F, 100 psi @ 180°F, 80 psi @ 200°F
Fact 28: PEX is more impact resistant to other materials than CPVC.
Fact 29: PEX is air tested at normal operating pressures to allow the installer to check the systems safety before water flows through.
Fact 30: PEX piping is made from material that resists bacterial growth.
Fact 31: PEX Tubing is oxidative resistant.
Fact 32: PEX is not resistant to sunlight, and must be kept out of sunlight and all UV (Ultra Violet) rays.
Fact 33: PEX is available in ¼’’ through 4’’ sizes and is packaged in coils or straight lengths.
Fact 34: PEX is sold in an oxygen barrier variation to prevent the penetration of oxygen, which will corrode any elements inside the system.
Fact 35: PEX can only be cut using ratchet or pipe cutters, no soldering is necessary.
Fact 36: PEX has the ability to merge with pre-existing copper and PVC systems.
Fact 37: PEX Piping can be insulated with conventional foam wrap material to keep the water at a steady temperature, and prevent freezing if necessary.
Fact 38: PEX tubing is vulnerable to penetration by plant feeding insects, piercing the tube, therefore resulting in leakage.
Fact 39: PEX is resistant to scaling due to its chemical properties.
Fact 40: Since PEX pipe typically have fewer turns than copper or PVC, this allows for greater water pressure to be distributed to sinks, showers, toilets, etc.
References:
https://en.wikipedia.org/wiki/Cross-linked_polyethylene
http://www.documents.dgs.ca.gov
