PEX Supply Pipe: Everything You Need to Know

PEX provide pipe is the most important revolution in plumbing for the reason that flush bathroom, and on this article we’ll reply the commonest questions householders have about it and likewise offer you some ideas for working with it.

Pex Or Copper

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Which is Higher – PEX or Copper?

PEX (cross-linked polyethylene) has a number of benefits over copper:

  • PEX is cheaper than copper. Half-inch PEX tubing prices a couple of third the value of copper. Among the financial savings shall be offset by the necessity for a particular instrument to put in the fittings, however in the event you’re doing a medium to massive plumbing job, you’ll often save through the use of a PEX provide as a substitute of copper.
  • PEX fittings are quicker to put in than copper. For those who use a manifold and ‘home-run’ system, it’s like operating a backyard hose to every fixture — tremendous quick and simple. However even in the event you set up PEX fittings in a traditional most important line and department system, the connections are faster to make than soldering copper.
  • A PEX provide gained’t corrode like copper. For those who reside in an space with acidic water, copper can corrode over time. A PEX provide is unaffected by acidic water and is subsequently a better option in these areas.
Pex Vs. Cpvc

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Pex Vs. Cpvc

A PEX provide and CPVC price about the identical. However there are a number of the explanation why a PEX provide could also be a better option. First, a PEX provide doesn’t require glue, which implies you don’t should work in well-ventilated areas or put on a respirator. PEX provide is much less possible than CPVC to burst if it freezes. Additionally, since PEX provide is extra versatile and is on the market in lengthy lengths, it could possibly work higher for ‘fishing’ by way of partitions in reworking conditions.

Do I Need Special Tools?

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Do I Want Particular Instruments?

No. You should use stab-in or compression fittings to make the connections. However they’re too costly to be sensible on massive tasks. For many PEX provide jobs, you’ll wish to spend money on a particular instrument to make connections. There are a number of PEX provide connection strategies, however solely two which can be inexpensive sufficient to be sensible for DIYers: crimp rings and cinch clamps.
Crimp rings are a band of metallic, often copper, that you just slip over the becoming and compress with a crimp ring instrument. The principle downside to the crimp ring methodology is that you just’ll want both separate crimping instruments for 1/2-in. and three/4-in. fittings, or a common instrument with a swappable insert (not proven). This provides just a little up-front price to this methodology. A combo equipment with interchangeable crimp jaws begins at about $100.

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Cinch clamps work extra like the standard band clamps you’re most likely accustomed to. You slip the cinch clamp instrument over the protruding tab and squeeze to tighten the cinch clamp. The identical instrument works for all sizes of cinch clamps. Cinch clamp instruments begin at about $40. We just like the one-handed model proven within the photograph as a result of you’ll be able to maintain the ring in place with one hand whereas tightening it with the opposite.

The one different particular instrument you want is a scissors-like cutter for the tubing.

How Do I Splice Pex Fittings Into My Existing Pipe?

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How Do I Splice Pex Fittings Into My Present Pipe?

There are a number of strategies. The simplest is to chop out a bit of plumbing pipe and slip in a stab-in tee (left). SharkBite is one frequent model of stab-in becoming. This methodology doesn’t require soldering, which generally is a large time-saver. However verify along with your plumbing inspector in the event you’re planning to bury this connection in a wall or ceiling. Some areas don’t permit stab-in fittings to be hid. One other methodology is to solder in a tee and a PEX provide adapter. Then slip the PEX provide tubing over the adapter and fasten it along with your chosen connection methodology (proper). You can too use a stab-in tee to attach PEX fittings provide to CPVC. Learn the label to search out the suitable becoming.

Do I Have To Use Manifolds With Pex?

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Do I Have To Use Manifolds With Pex?

No. You may set up PEX fittings provide similar to you’ll different pipe, with most important traces and branches to every fixture. However you lose loads of the advantages of PEX provide with this technique because it requires so many fittings. With the home-run system, you put in a manifold within the utility room or some space that’s near the primary water line and water heater, and run a separate PEX provide tube to every fixture as proven above. This technique makes use of extra tubing however is quick and solely requires two connections: one on the manifold and one other on the fixture finish. You can too use a hybrid system the place you run 3/4-in. cold and hot traces to a set of fixtures — for instance, a toilet — and set up a smaller manifold behind an entry panel. Then make brief runs of 1/2-in. PEX water line provide tubing to every fixture.
Manifolds look intimidating, however they really simplify plumbing runs and cut back attainable leaks by eliminating the necessity for tees and different fittings between the primary provide line and the fixture.

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Does It Meet Code?

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Does It Meet Code?

There isn’t any unified nationwide plumbing code. Earlier than beginning your PEX provide plumbing job, verify along with your native inspector for particular native necessities.

Do I Have To Use Red For Hot And Blue For Cold?

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Do I Have To Use Pink For Sizzling And Blue For Chilly?

PEX provide is available in crimson and blue colours that will help you preserve monitor of the cold and warm traces. You should use white PEX provide for every little thing in the event you favor.

Is PEX Dependable?

PEX provide has been used for many years in different international locations, the place there are literally thousands of properties with 30-year-old, leak-free PEX. A lot of the issues with PEX provide programs (in the USA and elsewhere) have been brought on by sloppy set up or defective fittings quite than the tubing itself.

Can I Connect Pex To My Water Heater?

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Can I Join Pex To My Water Heater?

PEX can’t be immediately linked to a water heater. First lengthen a pipe 18 in. out of your water heater and join the PEX provide to the pipe.

Which Tubing Should I Use For Interior Water Lines?

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Which Tubing Ought to I Use For Inside Water Strains?

For water traces, there are three PEX provide grades: PEX-A, PEX-B and PEX-C. They’re manufactured in another way, PEX-A being barely extra versatile. For those who’re ordering on-line, go forward and spend a number of cents additional for PEX-A. However don’t go operating round city searching for it; the distinction isn’t that large. The plumbers we talked to could be keen to make use of any of the three varieties in their very own properties. PEX can also be fashionable for in-floor radiant heating programs, for which you want PEX provide tubing with an oxygen barrier.

How Do I Connect Pex To My Plumbing Fixtures?

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How Do I Join Pex To My Plumbing Fixtures?

There are a number of strategies. If the connection shall be seen, like underneath a wall-hung sink, and also you would favor the look of a copper tube popping out of the wall, use a copper stub-out (left). You may join a compression-type shutoff valve to the 1/2-in. copper stub-out after which join your fixture. In areas which can be hid, like underneath a kitchen sink or vainness cupboard, you’ll be able to eradicate a joint by operating PEX provide on to the shutoff valve. Use a drop-ear bend help to carry the tubing in a good bend (proper). There are a number of sorts of shutoff valves that join on to PEX.
For those who’re utilizing a manifold system with valves, chances are you’ll not want to put in a shutoff valve on the fixture. Ask your plumbing inspector. We suggest including one, although. It doesn’t increase the price a lot and is extra handy than operating downstairs to close off the water when a restore is required.

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What About Expansion?

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What About Growth?

PEX provide expands and contracts greater than copper, so don’t stretch it tight. Let it droop just a little between fasteners. On lengthy runs, it’s a good suggestion to put in a loop as proven to permit for contraction. One other benefit of the loop is that in the event you mess up and wish just a little additional tubing, you’ll be able to steal it from the loop. Additionally, since PEX strikes because it expands and contracts, be certain that to drill oversize holes by way of studs or joists so it could possibly slide simply, and don’t use metallic straps to connect it. Use plastic straps as a substitute.

Will PEX Break or Cut up if it Freezes?

Most likely not. Producers are reluctant to say so, however reviews from the sector recommend PEX provide can stand up to freezing. It is best to nonetheless defend the tubing from freezing, however since it could possibly increase and contract, it’s much less more likely to break than inflexible piping.

What If I Goof? Can I Take It Apart?

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What If I Goof? Can I Take It Aside?

Positive — there’s a particular instrument for slicing off crimp rings, and you should use aspect cutters to take away cinch clamps. However a rotary instrument (Dremel is one model) fitted with a cutoff blade works nice for slicing both sort of connector (see photograph). After you take away the crimp ring or cinch clamp and pull the PEX provide from the becoming, minimize off the tip of the tubing to get a contemporary part for the brand new connection. For those who harm the becoming with the rotary instrument, change the becoming quite than threat a leak.


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