Faucet hose and galvanic corrosion

13 years ago

I have installed new sink faucets which have a copper connector leading into the valves and I have PB flexible water piping in my home with a 3/8" OD threaded valve connector. If I use a stainless steel braded hose (like this: http://www.lowes.com/pd_195292-73838-U261_0_?productId=3132125&Ntt=faucet+hose&pl=1&currentURL=%2Fpl__0_s%3FNtt%3Dfaucet%2Bhose%26page%3D2) to connect the water supply to the copper faucet valve lines, will this result in galvanic corrosion to the copper tubes on the faucet? Should I instead get some copper and make my own connection hose/tube? I suspect these hoses are actually lined internally with some rubber or plastic material and that the water passing through is actually not in contact with the stainless steel, but I am not sure.

Thanks!

Matt

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Comments (8)

User
13 years ago
As long as the actual metal is not touching, you will not see galvanic corrosion. Use teflon tape in the threads and make your connection.
brickeyee
13 years ago
"Use teflon tape in the threads and make your connection."

Most of the hose connections are compression connectors and no tape is required (and it should not be used).

The rubber seal is in the end of the hose and the threads are mechanical and not tapered.
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User
13 years ago
mcburton,

Just a note... the hose you posted the URL to is NOT a braided stainless steel hose.

It is a cheap hose with plastic braid in a clear vinyl case. It is no more reliable than the junk hoses you find all around it just looks like it is and the $5 price is the clue.

Shop around and find quality stainless steel braided hoses. It's worth the trouble cause you'll do it once and never bother with them again.
homebound
13 years ago
I think it's plastic hose wrapped in stainless steel braid. It should be fine (without worry about corrosion).
User
13 years ago
There is no steel of any kind in those Lowes $5 hoses. I've had a few blow and disassembled them. The braid was nylon.
Janet Flinkstrom
8 years ago
Can you use a submerged garden hose to add water to a swimming pool? Will it cause corrosion at the end submerged ?
woodbutcher_ca
8 years ago
Hi, I believe the threaded ends on the flex lines are stainless steel which won't react with copper.

Woodbuttcher
User
8 years ago
Yes, unless it is plastic, the end of your garden hose will corrode if continuously submerged in a swimming pool.

Regarding stainless steel and copper: It depends entirely upon the liquid in contact with the metals and the amount of stainless relative to the amount of copper. Best practice is to always electrically decouple dissimilar metals.