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pex

Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links. It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, and insulation for high tension (high voltage) electrical cables. It is also used for natural gas and offshore oil applications, chemical transportation, and transportation of sewage and slurries. PEX is an alternative to polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC) or copper tubing for use as residential water pipes.

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  1. S

    PEX barrier pipe – can anybody answer this?

    I have a question that I’m hoping those of you who are experienced central heating engineers may be abler to throw some light on. But first I need to tell you about my system, and the problem I’ve been having. Just over 7years ago I had a new CH system installed in my small semi. I say new – in...
  2. OscarSmith

    What kinds of plumbing pipes do I have?

    Hello. I'm new to this forum and I'm hoping to be able to learn some things as well as contribute as best I can. This might seem like an odd query, but I need to determine what kinds of plumbing pipes I have, and approximately what percentage of each type. I'd appreciate any help with this...
  3. S

    Frozen underground well water line.

    What is the best way to unfreeze underground pex line, about 8 feet down, going from my well to my house ? I already pulled the pump up and saw it was frozen. If anybody has an idea on how to attack this i would really appreciate it. Thank you.
  4. S

    PEX pipe conduit for cement

    I have about 6 metres of 22mm PEX to run through concrete and understand I need to have it in flexible conduit to offer a bit of protection and allow the pipe to expand. Is this the stuff you guys would use or are there other alternative products...
  5. J

    Pex pipe oxygen barrier

    Fast one for the experts Does the oxygen barrier prevent o2 from entering the pipe on lets say a negative flow or o2 out on a positive flow.or neither??
  6. D

    Insulation on chased-in pipes

    HI Plumbers, I need some advice on our chased-in pipes. We had plumbers tell us an array of different things. Questions: 1) Do copper pipes need insulation? 2) if so what type? 3) Do Pex pipes need insulation? 3) if so what type? I know they have been done already but I'm going to...
  7. B

    Does this job look trust worthy

    I’ve had a towel heater installed in a bathroom and I’m curious as to if it’s up to code/reliable. The 15mm pex transitions from the old copper pipe all connected with compression fittings, inserts were used for the pex. I will be boxing the pipes in as I’m a carpenter but before I do I just...
    • Blue0001
    • Thread
    • america job pex trust usa
    • Replies: 17
    • Forum: USA
  8. S

    Basic question - pex or copper for self build 100 sqm metre

    Basic question - pex or copper for self build 100 sqm metre 2 story house. It Is a budget build but will form part of a larger house for years to come. Plan to do some basic plumbing myself, no gas or oil just water pipes. which is a better option and why. Thank you
    • speedystu1
    • Thread
    • america basic build copper metre pex question usa
    • Replies: 5
    • Forum: USA
  9. A

    Is it safe to just unscrew the nut that connects a pex pipe directly with a tap?

    I tried to replace a couple of taps but surprisingly they are screwed directly to the pex piping instead to the flexible tap connectors. I'm no expert so I don't know if I can proceed as normal. I'm hesitant to just unscrew the nut because it looks like a permanent fitting glued to the pex and...
    • abe
    • Thread
    • america connects directly nut pex pipe safe tap unscrew usa
    • Replies: 4
    • Forum: USA
  10. D

    Hot water boiler for floor heat bleeder valve question

    have a hot water boiler (was converted to steam before me). Want to run the oxygen Barrier pex under the bathroom floors for heat. Do these loops need a bleeder valve? Thanks
    • Dandeeboy
    • Thread
    • america boiler floor heat hot hot water install pex question usa valve water
    • Replies: 3
    • Forum: USA
  11. L

    Pex sizes variants 15 16 1/2"

    I'm about to run water and heating pipes to what is going to be my new studio/garage building and trying to choose the type of pex for the job. I would like to use blue and red for the cold and hot water but I have noticed that it only comes in 1/2" rather than 15mm. Now, as I see pex and...
    • logic28
    • Thread
    • america pex sizes usa
    • Replies: 4
    • Forum: USA
  12. P

    Pex pipe-boiler: aerial distance

    I am adding radiators to my 2-pipe central heating. The whole piping is copper 22mm and microbore, and I'm extending it with 15mm pex barrier pipe graded for CH. I know that the first bit of pipes connected to the boiler must be copper, which is the case. However, I couldn't find whether there...
  13. M

    Can I use PEX pipes for hot water cylinder?

    UK rules. Can I use PEX/ PCV/ plastic pipes instead of copper, when I replace hot water cylinder? I want to replace old Tribune model with new Megaflo, both are unvented direct cylinder. With new unit comes combination valve and all the bits and bobs. Can I replace existing copper pipes...
    • michael55
    • Thread
    • america cylinder hot hot water hot water cylinder pex pipes unvented direct cylinder usa water
    • Replies: 6
    • Forum: USA
  14. N

    Will Pex Hose With SharkBite Fittings Work on 1/2" Copper Pipe ??

    Have an Inline Shut Off Valve with Compression Fittings that has developed a Leak.. The Valve actually serves No Useful purpose.. Because of limited access and no real wiggle room.. Could I Safely use a piece of Pex Hose and SharkBite Fittings to Replace the Valve completely ??
    • NorPlan
    • Thread
    • copper fittings hose pex pipe sharkbite work
    • Replies: 1
    • Forum: USA
  15. D

    DIY manifold with PEX and plumbing a bathroom

    Hello all, my wife and I have recently purchased a house in Edinburgh (move in date 6th dec hopefully) and I have been working hard to get a plan done for a diy manifold and I shall do a complete refit of the bathroom. I plan to do it all myself bar the electrics and boiler connections. The...
    • digspam
    • Thread
    • bathroom diy manifold pex plumbing
    • Replies: 4
    • Forum: Canada
  16. Crooksy88

    Connecting 15mm regular TRV to 10mm pex pipe

    Has anyone got any advise on this please. Can I use a compression reducer to connect a 15mm TRV to a 10mm pex pipe? Not sure if the compression would hold onto the pex pipe. Or do I have to go from TRV > copper > pex. Thanks, Mark
  17. G

    How to fit 20mm pex pipe to 22mm connector

    Hello all, I've bought a water pressure booster which works with 22mm pipe. I have in my home a 20mm PEX pipe. Can you help connect them ? (See picture of the booster) Please specify exact connector/adaptors that I need. Thanks a lot.
  18. C

    UPONOR`S NEW Q&E SHRINK FIT PEX PIPE SYSTEM

    Hello All, I hope that bringing attention to this `New product` from Uponor does not break any Forum rules ? It is basically a new Pex pipe system where the user fits a `Collar` to the end of a piece of pipe [to limit the amount of pipe diameter expansion] - then expands the pipe diameter...
  19. Joshua

    Is Polyethylene pipe (Qualpex) just Pex?

    I hear about Pex a lot, even before I just started my course. I've also learned about Polyethylene piping, are they one and the same? (I'm assuming so as Pex is in Qualpex, but I wanted to ask nonetheless).
  20. D

    Can I use PEX pipes to feed a default radiator?

    I'm pretty much a novice at DIY, fitting a Charnwood Country 8B woodburner with a back-boiler which puts a maximum of 7kW into the water, and the default radiator is 1.335kW. I'd like to use 28mm PEX pipes, as they're so much cheaper than copper; but I don't know whether it's safe to do that...
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