PEX is an acronym that can contain many meanings which are listed below.
PEX – Phigs Extension to X
There may be many popular meanings for PEX with the most popular definition being that of Phigs Extension to X
More PEX Definitions
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pex is cross-linked polyethylene tubing and fittings for plumbing. Introduced in Europe in 1960’s, in U.S.A in 1980’s. Very easy to install and much better to use for hot and cold water plumbing. It’s sold at Lowe’s in U.S.A, and I, being female and not knowing much about plumbing, installed the kitchen sink using pex tubing and fittings. Easy, peasy!