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Author:
Larryw (WA)
I purchased a Grohe exterior wall-mounted shower assembly that depicts the water connections be made to 1/2" NPT-MIP. My existing in-wall water lines are copper. Can I use copper instead of NPT? The provided male metal connectors are non galvanized, not stainless, and appear to be a high quality steel. Thanks for your help.
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Author:
packy (MA)
if you are asking if you can screw female adapters onto the grohe male ends, yes you can..
if you are not so great at soldering, solder some short stubs into the female adapters before attaching them to the grohe valve.
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Author:
steve (CA)
NPT is a standard for pipe threads, National Pipe Thread Tapered. It's not a type of pipe material. You solder standard copper pipe threaded adapters onto the copper for the faucet attachment. The adapters provided shouldn't be steel, but more likely plated brass.
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Author:
Larryw (WA)
I am confident with soldering. It is my concern about the differences in metals, and any compatibility issues. Don't want to have leaks after I hide it all behind finished tiles.
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Author:
Larryw (WA)
Just gave the provided adaptors the magnet test, and there is no attraction. Plated brass it is! I am polishing up the copper pipe and female connector now. Thanks.
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Author:
hj (AZ)
Most valves with female connections also allow the copper tubing to be inserted into the socket and soldered.
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Author:
Larryw (WA)
The piece in question is referred in the instructions as an 'S union'. It is male at both ends, has some plastic and rubber flow control thing inside, and not to be heated. I have seem the kind of units you talk about. Wish it was that simple. Thanks for your input.
Edited 1 times.
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Author:
packy (MA)
all the more reason for soldering a stub into the adapter BEFORE..
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