What plumbing tape is recommended for a copper waste water pipe

[Tellie]

Hi there,
We have a leaking waste water pipe which our washing machine, boiler and dishwasher feed into. We are working on getting a plumber in to fix but it is taking a while because access is awkward.
In the meantime, we're looking at using some tape to seal the leak but there are lots of different types (at different prices). Can anyone advise on what we should use?
We are looking to temporarily seal a copper waste water pipe which we've been told is corroded due plumber not having installed a boiler condensate neutraliser
Thanks for any help!

 

[ShaunCorbs]

If it is a condensing boiler the line will need to be replaced back to where it connects to the main stack hope this is cast and not copper

I suggest you make access as it could be leaking where you can’t see and causing damage

 

[Mary__]

If it's a condense pipe it should be replaced with plastic right back to the boiler. You shouldn't use copper for a condense pipe as it corrodes!