Damn! <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="

" title="Very Happy" /><!-- s:D --> Always thought it was ...plex. So much for working with plumber while in college. Bastard didn't teach me anything! <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="

" title="Very Happy" /><!-- s:D -->
So, it's just a brand name for a type of pipe material, PEX; cross-linked polyethylene.. anyway... Good to 93C, so fine for mashing, just don't boil it.
[quote:9ar39cik]Cross-linked polyethylene (PEX) is a high-temperature, flexible plastic (polymer) pipe. The cross-linking raises the thermal stability of the material under load. Thus, the resistance to environmental stress cracking, creep, and slow crack growth are greatly improved over polyethylene.
PEX pipe is approved for potable hot- and cold-water plumbing systems and hot-water (hydronic) heating systems in all model plumbing and mechanical codes across the U.S. and Canada. PEX piping systems are durable, provide security for safe drinking water, and use reliable connections and fittings. There are currently about ten domestic producers of quality PEX piping.
Brass fittings and couplings and polyethylene tees and elbows are available. Fittings are available in both mechanical compression and crimping styles, depending on application and manufacturer. In addition to domestic water supply systems, PEX tubing can be used for floor or wall radiant heating, and snow and ice melting systems in sidewalks and driveways.
PEX tubing is light weight, and it can withstand operating temperatures of up to 200° F (93° C). It is flexible and can easily be bent around corners and obstacles, and through floor systems. Sizes of PEX tubing range from 3/8-inch to over 2 inches.[/quote:9ar39cik]