
Pipes with lesser diameters can act like bottlenecks and put pressure on the tub spout. The pressure can build up across the system and cause bigger issues. PEX pipes are too narrow to use for tub spout drop. The inner diameter of the pipe is less than ½”. Therefore, manufacturing companies don’t recommend using PEX for tub spout drop.
Can I use PEX fittings for a slip spout?
You can't use PEX for a tub stub out either. A slip spout needs copper. PEX fittings also restrict quite a bit and do push water upward to the shower head. I had to open a wall up behind someone else's work when they had run PEX to the drop ear 90 on the tub spout. It was pushing water up to the shower head when filling the tub.
Can you use PEX pipe between tub/shower valve and spout?
i have heard that using PEX pipe between the tub/shower valve and the tub spout may be a bad idea, as it may cause water to go out the shower when unwanted. not sure why, unless the elbows for PEX being on the inside cause a restriction. also do newer valves account for this in any way ? trying to avoid soldering (i.e. using copper).
Do PEX fittings restrict water to the head?
PEX fittings also restrict quite a bit and do push water upward to the shower head. I had to open a wall up behind someone else's work when they had run PEX to the drop ear 90 on the tub spout.
Do I need a drop ear elbow for PEX pipe?
The problem with PEX is the pipe between the valve and spout, NOT the fittings or loose ell. A drop ear elbow is need regardless of the material, but it will not eliminate the back flow problem if you use PEX.

What kind of pipe is used for tub spout?
The slip-fit tub spout is designed to slip onto a 1/2" copper pipe without the use of any threads. The end of the copper that will be used must be free of burrs or rough edges, when using this type of spout.
How do I connect my PEX tub spout?
0:271:58How to Connect Pex Plumbing to a Bathtub Faucet - YouTubeYouTubeStart of suggested clipEnd of suggested clipSlide it onto the pecs. Then put our elbow on there. And we'll go ahead and crimp that into placeMoreSlide it onto the pecs. Then put our elbow on there. And we'll go ahead and crimp that into place after that's crimped into place you want to go ahead and attach it to your studs.
Where should you not use PEX pipe?
PEX cannot be taken anywhere outside the house where it is directly exposed to UV for a long period. The synthetic material of the pipes can slowly disintegrate due to the light of the sun. Even light bulbs have been known to affect the lifespan of PEX water lines.
Can you use PEX for shower faucet?
Cross-linked polyethylene (PEX) is a new and trendy type of flexible plastic pipe, perfect for showerheads. It is the function of the I.D. of the PEX tubing to adequately restrict the water so that it will fill the riser to the showerhead and drip out.
Can you use SharkBite on tub spout?
If you are trying to install a screw-on tub spout, it might not tighten up, because the SharkBite adapter will spin. You would need to use a wrench to tighten the SharkBite side, and that would be hard to do inside the spout.
Can you connect PEX directly to faucet?
Because it's so flexible and easy to use, connecting PEX to a faucet or other valve takes less time than connecting to copper. There are far less fittings required because of its flexibility, and connecting PEX to a faucet is done with a crimper, requiring no soldering.
What are the disadvantages of using PEX pipe?
The biggest disadvantage to PEX is that it is unknown how well or long it will last. While PEX piping is warrantied for up to 25 years, it is unknown what could happen to PEX piping as the years go on. Since it is so new, it is hard to know what water will do to the plastic over 30 years.
Can I use blue PEX for hot water?
Color-Coded: Red PEX pipes can be used for hot water supply lines, blue PEX for cold water supply, and white for either hot or cold.
Does PEX restrict water flow?
The reality is that even PEX expansion fittings, which are sometimes referred to as “full-flow,” restrict flow rates.
Can I use PEX for tub spout?
I gather that 1/2″ PEX isn't suitable to connect a tub/shower valve to the tub spout because the internal diameter of the PEX and especially its fitting is too restrictive, which will cause the shower to dribble while using the tub spout.
Should I use copper or PEX for shower?
PEX pipes and copper pipes are both viable options for your water supply line. While PEX pipes are easier to install, cheaper, and more flexible, copper pipes are sturdier and tend to have a longer lifespan.
Should I run 3 4 PEX to shower?
Most fixtures (sink, toilet, tub, shower) don't need 3/4 all the way, but it is not forbidden or bad to do so. When branching off, you can use a PEX Tee fitting that also reduces. You can branch off at 1/2 at each fixture, and continue with 3/4 until the next branch off.
Can you put a tub spout on PEX?
I gather that 1/2″ PEX isn't suitable to connect a tub/shower valve to the tub spout because the internal diameter of the PEX and especially its fitting is too restrictive, which will cause the shower to dribble while using the tub spout.
How do you connect PEX pipe to fixtures?
Obtain a specific PEX compression fitting that will attach to your fixture. ... Coat the threads of the fixture with Teflon pipe dope, then screw the nut of the compression fitting over the threads on the fixture. ... Push the end of the PEX pipe through a compression nut, then push a compression ring onto the end of the pipe.More items...
How do you connect PEX pipes?
6:3321:43PEX Pipe Installation - ALL Connections To Fittings ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou don't want to have it too close or too far apart eighth inches about right and what i like to doMoreYou don't want to have it too close or too far apart eighth inches about right and what i like to do is take a pair of needle nose. Go over that crimp ring and crimp it on tight.
How do you install a PEX faucet supply line?
2:403:43How To Install a BrassCraft® PEX Valve - YouTubeYouTubeStart of suggested clipEnd of suggested clipAttach the knot to the riser. And tighten the nut according to manufacturer's instructions. MakeMoreAttach the knot to the riser. And tighten the nut according to manufacturer's instructions. Make sure that the valve is in the off position by turning the handle clockwise. Until you feel resistance.
Does Viega Pex work on shower heads?
I have been running Viega Pex since it was available and always use it for the drop to the spout and the shower head using drop ears, never had a problem.
Can you use PEX in a tub spout?
Every faucet manufacturer, as far as I know, advises NOT to use PEX from the valve to teh diverter tub spout. They may get away without it happening but the odds are against it.