PEX PIPING

PEX PIPING SYSTEM

PEX (or crosslinked polyethylene) is part of a RO Water, Acid & Bicarb concentrate supply piping system that has several advantages over metal pipe (copper, iron, lead) or rigid plastic pipe (PVC, CPVC, ABS) systems. It is flexible, resistant to scale and chlorine, doesn't corrode or develop pinholes, is faster to install than metal or rigid plastic, and has fewer connections and fittings.

PEX-Al-PEX (or PEX-Aluminum-PEX or "PAP") is a specialty PEX tubing. This tubing has a layer of aluminum embedded between layers of PEX to provide an oxygen barrier. PEX-Al-PEX may also be called multilayer pipe. PEX-Al-PEX will also retain shape when bent, and may also exhibit less expansion and shrinkage during temperature fluctuations.

PEX tubing is made from crosslinked PE (polyethylene) polymer. The PE is melted and continuously extruded into tube. The crosslinking of the PE is accomplished in one of three different methods.

Advantages of PEX Plumbing

  • Flexible PEX tube is manufactured by extrusion, and shipped and stored on spools, where rigid plastic or metal piping must be cut to some practical length for shipping and storage.
  • PEX plumbing installations require fewer fittings than rigid piping. The flexible tubing can turn 90 degree corners without the need for elbow fittings, and PEX tubing unrolled from spools can be installed in long runs without the need for coupling fittings.
  • Attaching PEX tube to fittings does not require soldering, and so eliminates the health hazards involved with lead-based solder and acid fluxes; PEX is also safer to install since a torch is not needed to make connections..
  • PEX resists the scale build-up common with copper pipe, and does not pit or corrode when exposed to acidic water.
  • PEX is much more resistant to freeze-breakage than copper or rigid plastic pipe.
  • PEX tubing does not transfer heat as readily as copper, and so conserves energy.
  • Water flows more quietly through PEX tube, and the characteristic "water hammer" noise of copper pipe systems is virtually eliminated.
  • FLOW of water / chemical inside the PEX tubes are LAMINAR unlike turbulent flow in GI / CPVC pipes.
  • HIGH UV RESISTANCE. Unlike GI and PVC / CPVC pipes, PEX pipes do not have any effect of UV radiation as carbon black is used. With the use of carbon black, PEX pipes can be safely used for external installations.


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