Soldering new pipe to old painted pipe

[jaydebruyne]

So,

The story goes like this:

Went to fit a new rad today but plumb centre gave me a double panel instead of a single and because I was in a rush I didn't clock this error. I just stuck it in the van and went to the property.

Anyway, drained the system, put on shiny new valves and hung the rad to find out that the tails are 20mm out to the pipes. So I bend myself 2 20mm offsets (first time by sight and spot on might I add, quite proud of that!) and look at the pipe and it's screaming at me "solder me and I'll swear I'll leak!".

I know I can put some heat on the paint and scour it off with some wire wool. But is it really alright to solder???? Would a compression coupling be better??

I didn't finish the pipework in the end as it got late and the tenant needed to go out. But I'm going back on wednesday to finish it off.

So I'm asking for a few tips regarding soldering old pipe to new, or if compression couplings would be better?

Cheers

 

[mfgs]

I just use grips and a cleaning strip to get paint off the pipe, I use my blowtorch if it is really bad. Once the paint it off and the copper clean then it is absolutely fine to solder on to it,

 

[Deleted member 64964]

As long as you get it down to clean copper and use a good flux there is no difference in soldering new or old.

 

[jaydebruyne]

I use laco. I used to use the other one in the yellow tub (can't remember the name) but I find it's not great. Lack takes the solder a lot better in my opinion.

But thanks for the assurance. I'll solder it then

 

[gasmanrob]

So long as the paints off and the waters out you'll be fine

 

[Deleted member 64964]

I use laco. I used to use the other one in the yellow tub (can't remember the name) but I find it's not great. Lack takes the solder a lot better in my opinion.

But thanks for the assurance. I'll solder it then

If you've never tried it next time grab some Everflux white tub blue lid. In my opinion it walks all over Laco

 

[Dotty]

I've always used gas pliers to strip the paint off. And powerflux is the daddy of fluxes.

 

[jaydebruyne]

If you've never tried it next time grab some Everflux white tub blue lid. In my opinion it walks all over Laco

Ah I've seen that about.. Might try it when my tub runs out

 

[newcastle phill]

Who needs solder ...

Just bash it on over the paint - it will seal it

 

[jaydebruyne]

I've always used gas pliers to strip the paint off. And powerflux is the daddy of fluxes.

View attachment 20850

Ooh they look nice.. Powerful, that's the one. Yeah I don't like it

 

[dancinplumba]

Yerp Phil soon fur up

 

[jam1979]

Use map gas on old pipe if it still has a bit ov water in it

 

[dancinplumba]

Best way to strip paint off pipes is to burn off til pipe is red hot then grab hold and rub wi fingers til the prints gone off em )

 

[gasmanrob]

I've always used gas pliers to strip the paint off. And powerflux is the daddy of fluxes.

View attachment 20850

Power flux!!!

you mean that stuff that instantly welds pipe together upon contact so your 90 is facing the wrong way and refuses to budge...

 

[stevetheplumber]

im a scraper either the stanley knife or the back of the junior blade will take gloss of in sheets contary to rumours i no longer carry a shavehook