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Connect old rad valves to new rad

Discuss Connect old rad valves to new rad in the Plumbing Jobs | The Job-board area at PlumbersForums.net

TonyQJ

TonyQJ

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16
Hi Guys. Sorry for such a long first post.

We have a 24 year old 10mm microbore ch system and on the advice of a plumber I’m going to change the rads a room at a time, as and when we decorate, to slowly achieve a more efficient system. I’m aware that modern metric rads will require an extender to get from the valve to the rad, but herein lies my problem.

The existing valves terminate in a 25mm male thread, with the rad tails (obviously) having a matching female. Modern rad tails, valves and valve extensions all appear to be 15mm. To replace the existing rad valves would require draining the system down every time I wish to change a radiator, so...

Is there such a thing as a Chrome 25mm extension tail? If not, does anyone have a suggestion that doesn’t involve changing the valves?

Thanks in advance for any advice.

Ps. When I say “25mm” that’s measuring across the thread with a tape.
 
Pics:
Lock shield 1, lock shield 2, Radiator tail
D82813B2-436C-41CC-967C-C218F4BEEFD4.jpeg
2A871224-EED3-497D-A7CE-4198066805F6.jpeg
4FFA8792-3D03-43ED-BF4A-918AD8DCE842.jpeg
 
Need to pull the the fitting out the rad then use 1/2 extensions from the fitting to the rad
 
Thanks all...

Plumbers merchants - I’ll try tomorrow if no joy on here.

Pull the fitting out of the old rad - that would work I think, which leads on to my next question - how? It has an internal hex about 12mm across the flats, does the tool for this have a specific name?

Toolstation - I cant see how that piece would help me.
 
TonyQJ said:
But as I wrote in the OP that would mean draining down the system every time I change a rad.
Click to expand...
But then you would have a nice shiny new valve on each rad?? You could try bunging it if it’s an open vent system
 
Riley said:
But then you would have a nice shiny new valve on each rad?? You could try bunging it if it’s an open vent system
Click to expand...

Only just recently had a Brit Gas bod here for two days, re-plumbing the airing cupboard, rodding out some pipes, replacing some plastic with copper, loads of upstairs floorboards up, fitted a filter and treated the system. It was he who recommended replacing the rads one by one as and when. This is the first one I’m changing. Yes it’s open vented but I’m wary of messing with the system too much now that he’s got all rads working again. I know I could tie up the ball valve in the loft, drain it all down and then add inhibitor before releasing the ball valve again but as I say, I’m wary of messing with it. I’m happy with the old valves at this stage. I could always change them all in one go at some time in the future.

Thanks for the suggestions though :)
 
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