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Old 10-28-2016, 12:22 PM   #1
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Soldering directly to T/S Valve?


We are adding a new bathroom and the first part of the plumbing has just been installed.

Most looks OK, but one connection troubles me. See attached picture.

I'm concerned that heat from soldering the copper pipe directly to the Delta MultiChoiceT/S Valve Body might have damaged the valve.

I can get another valve and ask the plumbers to attach it "correctly" if that seems advisable.
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Old 10-28-2016, 01:41 PM   #2
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Re: Soldering directly to T/S Valve?


I just saw a video that showed the inside of this valve body. The whole thing is brass so there is nothing to melt.
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Old 10-28-2016, 06:36 PM   #3
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Re: Soldering directly to T/S Valve?


Always a good practice to test your shower/tub facet combination before you
enclose the space with rock or what ever your using for the wall. Also , in my opinion, given modern brass fixtures and valves are lead free mostly, I pull the guts from them when I can before applying heat to get lead free solder to flow. Soldering is an all new skill set now days.
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Old 10-29-2016, 10:13 AM   #4
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Re: Soldering directly to T/S Valve?


Second on testing before closing it. As a diy, I always use the screw on adapters with a short length of tail, keep the valve open and cool it down quickly with water or wet rag.
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Old 10-29-2016, 01:26 PM   #5
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Re: Soldering directly to T/S Valve?


Quote:
Originally Posted by LeakyMike View Post
Always a good practice to test your shower/tub facet combination before you
enclose the space with rock or what ever your using for the wall. Also , in my opinion, given modern brass fixtures and valves are lead free mostly, I pull the guts from them when I can before applying heat to get lead free solder to flow. Soldering is an all new skill set now days.
I'm sure the plumber soldered that connection before installing the valve.

Lead free soldering sounds challenging. I've only soldered with 50/50 tin/lead solder - and only electronic parts.
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Old 10-30-2016, 09:18 PM   #6
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Re: Soldering directly to T/S Valve?


Yeah and my thing with lead free brass is the heat you need to get the 95/5
to flow into it. I've found Oatley 95 tinning flux to be a great help with that.
I do not like the water based eco friendly (so called) fluxes. Map gas or my
b tank acetylene torch work well for this. The days of 50/50, 60/40 and propane
for potable water are long over. Little bit of a learning curve but a patient man
can do it.
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