08:59AM | 07/07/05
Member Since: 06/08/05
24 lifetime posts
I'm installing new bathtub fixtures...spigot, shower head, mixing head etc...using 1/2" copper piping. The mixing head's four ports are female brass fittings. A large red label is attached to the mixing head that says excessive heat will screw up the device....that's the short and sweet translation. How do you attach the copper pipes to the mixing head if you can't sweat them on? If I use a male sweat adaptor and teflon tape, won't the tape just melt when I solder on the rest of the piping?

Jim D

12:52AM | 07/08/05
Member Since: 01/06/01
342 lifetime posts
ROWIGA - hi, I'm not an expert in plumbing but here's two thoughts. First - the mixing head may contain a cartridge which is what could go bad from excessive heat. You should be able to do your soldering if you remove the cartridge and any washers/springs/seats, and not reinstall them until the mixing head area has cooled down. Second - if you use the teflon tape, I'd think that's the last connection you'd make before turning the water back on - do all the other soldering in that area first so the piping doesn't transfer the heat to the tape and make it melt.

Hopefully, the expert plumbers will post a reply for you that'll make it easy for you. Good luck! Jim D/West Point, VA


08:03AM | 07/09/05
Member Since: 08/29/04
227 lifetime posts
Here's what I do. I solder the adapters on the copper long before I'm actually going to work on the valve. Typically I use a random length of copper I know I'm going to have to cut off to fit to the vertical risers. Then I let them cool. After they are cool, I use the teflon tape and screw them into the valve. By the way, I start my teflon tape at the copper pipe side of the thread, then wind to the tip of the thread and wind back to the pipe, overlapping my innitial wind. This leaves no exposed end of the teflon tape and puts on the right number of wraps to make it leak proof.

Once the adapters are installed with the copper already soldered on, then I cut them to the lenght I need with a mini cutter (small round tubing cutter that snaps on the the pipe and cuts by spring tension). Now when you solder the risers, you are typically only getting indirect heat, and the copper radiates off the major damaging heat.

And removing the cartridges is still a good idea.

Good Luck

Raymond VinZant Plumbing Prof.


03:25AM | 07/11/05
Member Since: 06/08/05
24 lifetime posts
Thanks for the help. I ended up making the copper line runs long enough to go through the floor and then soldered the adapters to them. With the mixing head uninstalled (and the pipes cooled down), I attached the runs using teflon tape, slid the pipes through the floor and then secured the mixing head. No leaks!
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