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Old 04-27-2013, 11:34 AM   #1
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Why is the pipe for tub spout supposed to be copper?


In the instruction to my new shower valve it says to only use copper pipe for the tub spout, what is the reasoning behind this? Im trying to avoid having to have anything sweated, is there a way around this?

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Old 04-27-2013, 11:39 AM   #2
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Why is the pipe for tub spout supposed to be copper?


Copper doesn't expand as much as the plastics when it gets warm and stays solid. It'll be flopping around if you don't use copper for that particular part.

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Old 04-27-2013, 11:47 AM   #3
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Why is the pipe for tub spout supposed to be copper?


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Copper doesn't expand as much as the plastics when it gets warm and stays solid. It'll be flopping around if you don't use copper for that particular part.
No.


If the tub spout has pex used, the flow rate is restricted in such a way that the showerhead will also run when you only intend to have the tub spout running.
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Old 04-27-2013, 11:55 AM   #4
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Why is the pipe for tub spout supposed to be copper?


I believe Alan is correct. The instructions on my Kohler water temperature controller said exactly the same thing, and explained that the inside diameter of PEX was too small, would restrict flow, and would result in improper operation of the temperature control.
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Old 04-27-2013, 11:56 AM   #5
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Why is the pipe for tub spout supposed to be copper?


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No.


If the tub spout has pex used, the flow rate is restricted in such a way that the showerhead will also run when you only intend to have the tub spout running.
Thats what I thought it had to do with but wasnt sure. So its because the inside diameter of other pipes is smaller and causes water to flow up the shower?

Can I use cpvc?
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Old 04-27-2013, 12:10 PM   #6
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Why is the pipe for tub spout supposed to be copper?


Don't use CPVC but you could use a threaded brass nipple.
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Old 04-27-2013, 12:23 PM   #7
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Why is the pipe for tub spout supposed to be copper?


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No.


If the tub spout has pex used, the flow rate is restricted in such a way that the showerhead will also run when you only intend to have the tub spout running.
Even if you've run pex to a drop ear overhead?
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Old 04-27-2013, 12:27 PM   #8
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Why is the pipe for tub spout supposed to be copper?


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Even if you've run pex to a drop ear overhead?
Don't use PEX for the run up to the shower or down to the spout. Copper is the best choice. The PEX is to restrictive for either location.
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Old 04-27-2013, 12:53 PM   #9
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Why is the pipe for tub spout supposed to be copper?


Im thinking about doing the tub spout with copper using shark bites and one compression fitting.
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Old 04-27-2013, 01:04 PM   #10
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Why is the pipe for tub spout supposed to be copper?


I used stainless steel.....
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Old 04-27-2013, 04:28 PM   #11
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Why is the pipe for tub spout supposed to be copper?


I have done over a dozen shower/ tub set ups using only pex and have never had a problem. In other people's houses I would only use copper because it is the best way to go.
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Old 04-27-2013, 04:34 PM   #12
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Why is the pipe for tub spout supposed to be copper?


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Don't use PEX for the run up to the shower or down to the spout. Copper is the best choice. The PEX is to restrictive for either location.
Just go from 3/4 to 1/2" reducer at the shower & tub faucet.
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Old 04-27-2013, 05:11 PM   #13
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Why is the pipe for tub spout supposed to be copper?


When you solder copper it will be hard and hold the tub spout in place. Pex pipe will move around and the tub spout will move around. Has nothing to do with flow
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Old 04-27-2013, 09:13 PM   #14
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Why is the pipe for tub spout supposed to be copper?


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When you solder copper it will be hard and hold the tub spout in place. Pex pipe will move around and the tub spout will move around. Has nothing to do with flow

So youre saying if you secure PEX it would be ok?
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Old 04-27-2013, 09:29 PM   #15
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Why is the pipe for tub spout supposed to be copper?


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So youre saying if you secure PEX it would be ok?
no no no don't use pex....copper... if you cant solder ,,,use brass threaded nipples with 90 degree elbow...ben sr

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