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Shower Valve Rough In - Sweat It Or Female Adapters?

 
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Old 03-14-2015, 08:30 PM   #1
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Shower Valve Rough In - Sweat It Or Female Adapters?


I've been sweating on pex adapters to my r10000 rough in valve bodies. My plumber used female 1/2 npt adapter with teflon tape and pipe dope.

Its a whole lot faster and simpler for me to use the female adapters.

What is your standard operating procedure?

Also, are you using 3/4 pex when you install onto an existing copper system to keep the same inside diameter. I know you have to have copper from the valve to tub spout but didn't know about the supply lines and line to shower head???

Last edited by Spencer; 03-14-2015 at 08:48 PM.
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Old 03-14-2015, 08:45 PM   #2
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Copper from valve to tub spout. Usually sweat in a 90 degree crimp adapter.

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Old 03-15-2015, 06:55 AM   #3
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Every time we would rough in a shower value if there was PEX ran to it the line going from the value to the shower head would be copper just to give it that added strength. If it were me I would sweat my fittings into the value just because then it is one less fitting on the value that could leak.
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Old 03-15-2015, 08:05 AM   #4
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Quote:
Originally Posted by overanalyze View Post
Copper from valve to tub spout. Usually sweat in a 90 degree crimp adapter.
Always use copper for the tub spout or the shower head might dribble when filling the tub.
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Old 03-15-2015, 12:33 PM   #5
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


I'd use copper because PEX isn't code approved here.
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Old 03-15-2015, 03:01 PM   #6
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Quote:
Originally Posted by mikeswoods View Post
Always use copper for the tub spout or the shower head might dribble when filling the tub.
that is a new one that i have not heard yet
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Old 03-15-2015, 03:19 PM   #7
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


I've been using the female to pex adapters for years. Teflon tape and pipe dope, wrench em on there good. Haven't had a problem yet.

I usually drop down galvanized for the spigot.
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Old 03-15-2015, 03:32 PM   #8
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Quote:
Originally Posted by pappagor View Post
that is a new one that i have not heard yet
I learned this one the hard way awhile ago. Luckily I was able to change it out from the access panel.
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Old 03-15-2015, 08:22 PM   #9
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Quote:
Originally Posted by pappagor View Post
that is a new one that i have not heard yet
Yep. I learned the hard way too. First shower I changed out on my own I screwed up on this and it cost me big time.
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Old 04-20-2015, 10:27 PM   #10
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Quote:
Originally Posted by mikeswoods View Post
Always use copper for the tub spout or the shower head might dribble when filling the tub.
Can you explain this? I always run copper for the spout and shower head, but how does pex make the shower dribble? More importantly, how would one stabilize a spout connected with pex?
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Old 04-21-2015, 09:04 AM   #11
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


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Can you explain this? I always run copper for the spout and shower head, but how does pex make the shower dribble? More importantly, how would one stabilize a spout connected with pex?
Inside diameter of pex is less. Creates a back pressure that causes the shower head to dribble when you run the tub spout solo. I've seen guys solve this by using 3/4 pex. Its about the same inside diameter as 1/2" copper.

You stabilize the pex by using a drop ear elbow and screwing it to blocking. Obviously the piece from the drop ear to the tub spout is not pex.
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Old 04-21-2015, 11:33 AM   #12
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


Quote:
Originally Posted by Spencer View Post
Inside diameter of pex is less. Creates a back pressure that causes the shower head to dribble when you run the tub spout solo. I've seen guys solve this by using 3/4 pex. Its about the same inside diameter as 1/2" copper.

You stabilize the pex by using a drop ear elbow and screwing it to blocking. Obviously the piece from the drop ear to the tub spout is not pex.
Aka stacking. It's in the instructions of the shower valve.
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Old 04-21-2015, 11:34 AM   #13
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Re: Shower Valve Rough In - Sweat It Or Female Adapters?


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Aka stacking. It's in the instructions of the shower valve.

Yep. It's very clear after you go back and read them when you screw it up for the first time and have the insert installed and mudded...

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