Annoyingly I have used a copper nut on a steel isolation valve and the corresponding steel nut on a compression copper fitting (15mm). Should I dismantle and redo? I will have to buy a length of plastic pipe and new olives as well as drain system. Or will it be OK?
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Mixing metals on compression fittings
- Thread starter Hillabaloo
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View the thread, titled "Mixing metals on compression fittings" which is posted in UK Plumbers Forums on UK Plumbers Forums.
Are you sure it is steel & not a chrome plated brass fitting? It would be very rare for steel to be used as it rusts.
I very much doubt you have ? Never seen a copper nut on a steel valve i think you are getting confused please post a picture so we can see your delemia. Kop
The fitting was from screwfix described as brass, steel and plastic.
https://www.NoLinkingToThis/c/heati...p=managedredirect-_-plumbing-_-isolatingvalve
I attach two photos. Thanks for help so far
https://www.NoLinkingToThis/c/heati...p=managedredirect-_-plumbing-_-isolatingvalve
I attach two photos. Thanks for help so far
It will be fine (as long as you used inserts mentioned).
For future reference, the valve is Brass which has been Chrome plated and the gold coloured nut is Brass. There are stainless steel and plastic components inside the valve.
For future reference, the valve is Brass which has been Chrome plated and the gold coloured nut is Brass. There are stainless steel and plastic components inside the valve.
Thanks very much for the replies. A great relief. I did use inserts in the plastic pipe.
Yes. Hard plastic inserts.
The ones with the extra blue o ring eg the super seal ones ?
The pipe has the blue plastic lining, but the inserts are solid white. See picture. Should I use different ones for copper compression fittings?
Correct ones for compression fittings 🙂
Thanks. Very reassuring. Just googled and educated myself on the two types of insert. Pure chance that I bought correct ones.
I used copper olives. Also used ptfe tape over olives.
Shouldn't put ptfe tape over the olives.
Thanks will change it
Why ?
Because it doesnt need it. Maybe a bit of paste but ptfe is for threads.
Scott_1979
Gas Engineer
Nothing wrong with wrapping PTFE round an olive, it works just fine.
PTFE over the olives works for me, cleaner than paste & less likelihood of it going into the system.
@Robert Bell
What you disagreeing with?
What you disagreeing with?
Err. Not sure lol. Where have I disagreed
Never mind just found it. Must’ve been my fat thumbs.
We’ve all been there?
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