On 02/05/2020 22:48:59, Roger Hayter wrote:
Fredxx wrote:

On 02/05/2020 13:57:18, Roger Hayter wrote:
Dave Plowman (News) wrote:

In article ,
Robin wrote:
On 02/05/2020 13:13, Dave Plowman (News) wrote:
In article ,
Roland Perry wrote:
No big deal to connect lead to copper using solder. For a decent
plumber.

The consensus is that this is now banned for potable water.

They have banned a soldered joint in a lead pipe carrying potable water?

Does Trump make the rules in the UK?


If there's lead in the solder, yes. And in Regulations made in 1999 so
you know which government to slag off.

Lead free solder has been around for ages.

I ask again. You have perhaps miles of lead pipe carrying potable water. A
single solder joint - even with lead solder - is going to make a
difference?

I don't think lead free solder will work. (It doesn't work for most
things!) And perhaps a fresh lead surface will dissolve more for a few
decades than the coated internal lining of the whle of the old pipe, I
don't know but it is quite credible.

I asked another poster who made the assertion "Law prohibits 'sweating'
lead to copper" a similar question.

It seems you can use lead free solder on lead:

https://www.wras.co.uk/resources/int...tallation/i25/

Given the way tin alloys with lead I'm not surprised.

I note that reference confirms my supposition that a fresh lead surface
leads to increased lead levels in the water. I note that lead free
solder may be permitted, but I look forwarded to hearing from anyone who
has successfully made a wiped joint with it.

If you cut away a pipe in the manner you might expect to fit a Lead-Loc
then fresh lead will be exposed. I don't see the advantage over fitting
a 15mm copper pipe into a lead pipe and soldering the two. Lead melts at
a higher temperature than lead free solder. It is possible less fresh
lead is exposed in a soldered combination that can leach lead.

Most of the youtube videos regarding wiping a joint use 60/40 tin/lead
solder. That is pretty close to eutectic. I always thought for wiping
you used a 70/30 lead/tin where you had a wide temperature range when
the solder is workable as it cools.