So .. I bought this new kitchen sink mixer tap..

[chucka]

Why would you try to solder or unsolder any fittings below the sink????
No need to. Just cut the pipe tails to the tap, remove tap, cut pipes below sink to suitable heights and/or cut a piece out of horizontal pipes to get vertical pipes further apart.
Use compression valves or fittings onto pipes that are within cupboard. (You can bench solder any pipes to be added if you wish).
Nothing wrong with compression joints below sink if easier to use.
The person that installed the tap using soldered connectors directly to the copper tails has actually done a worse job than compression would have been

I'm definitely not being bloody minded here and do not want to be disrespectful of anyone here, but, in my mind 'IF' the original assembly went in with the tap tails already fitted/screwed into the tap bloc and then the tap offered down through the sink top hole with the tails sliding into the two solder butt joints ,9" down from the top, surely with a little heat they would (after removing the threaded rod) both separate there too and let you pull the tap up out of those joints. That would not improve on the original plumbers method; I understand that, but if the new one went in the same way i'd not complain... Am i wrong in assuming it will not separate at those joints?

I'm sure it worked in the parallel universe..

 

[centralheatking]

I'm definitely not being bloody minded here and do not want to be disrespectful of anyone here, but, in my mind 'IF' the original assembly went in with the tap tails already fitted/screwed into the tap bloc and then the tap offered down through the sink top hole with the tails sliding into the two solder butt joints ,9" down from the top, surely with a little heat they would (after removing the threaded rod) both separate there too and let you pull the tap up out of those joints. That would not improve on the original plumbers method; I understand that, but if the new one went in the same way i'd not complain... Am i wrong in assuming it will not separate at those joints?

I'm sure it worked in the parallel universe..

go for it let us know how you get on v
chking

 

[Best]

I'm definitely not being bloody minded here and do not want to be disrespectful of anyone here, but, in my mind 'IF' the original assembly went in with the tap tails already fitted/screwed into the tap bloc and then the tap offered down through the sink top hole with the tails sliding into the two solder butt joints ,9" down from the top, surely with a little heat they would (after removing the threaded rod) both separate there too and let you pull the tap up out of those joints. That would not improve on the original plumbers method; I understand that, but if the new one went in the same way i'd not complain... Am i wrong in assuming it will not separate at those joints?

I'm sure it worked in the parallel universe..

What are you actually attempting?
Surely what you really want is the tap replaced as easy as possible, to a decent standard and done in a way that would enable you or whoever is the next person to replace mixer next time?
Taps generally don’t last too long anymore, so that is why you need ideally compression connections and isolating valves.
The old copper tails are scrap copper, so cut them above the soldered connectors and remove the tap.
Then you can think of unsoldering each connector individually if you really want to, but I have no idea why you feel you need to do that.
Just cut pipes finally below the soldered connectors.
To try to unsolder the 2 fittings and pull the old tap up at same time is not a wise idea trust me.

 

[Harvest Fields]

I'm definitely not being bloody minded here and do not want to be disrespectful of anyone here, but, in my mind 'IF' the original assembly went in with the tap tails already fitted/screwed into the tap bloc and then the tap offered down through the sink top hole with the tails sliding into the two solder butt joints ,9" down from the top, surely with a little heat they would (after removing the threaded rod) both separate there too and let you pull the tap up out of those joints. That would not improve on the original plumbers method; I understand that, but if the new one went in the same way i'd not complain... Am i wrong in assuming it will not separate at those joints?

I'm sure it worked in the parallel universe..

No worries mate. If that is the way you would like to do it, then that is absolutely fine. I and others have instructed you on the best way to do it. If you would like to do it a different way then that is absolutely fine.

Thread now closed as we keep going around in circles