Replacing old Rad...

[d4nnyboy]

Before I ask my question thanks in advance for anyone who helps,


Basically before I install a new double radiator to replace the old single one I just want to clear up a few things first.

The valves on my old ones are quite old and look like this:

And as I imagine you know that current Rads normally have a feed one side and a return valve the other side,
here's a pic of the old rad:

I want to solder new pipe under the floorboards so the new rad has the return valve on the correct side.
Here's my little sketch to illustrate the results i want:

So basically all I want to know is if i'v understood this old valve right:

My knowledge on plumbing is fine when its toiletts, sinks etc but my understanding on central heating is limited.

Any guidance will be apprieciated

 

[smoggs03]

yeah thats right pos for flow and return. i would just cut pipes and bin everything else. fit a universal trv and jobs done!!

 

[d4nnyboy]

Thanks for the reply,
I forgot to mention that I was planning to get new valves and not reuse the old one...

Anyway thanks very much, I feel much more confident in taking on this job.

 

[stevetheplumber]

Thanks for the reply,
I forgot to mention that I was planning to get new valves and not reuse the old one...

Anyway thanks very much, I feel much more confident in taking on this job.

only problem you might have is getting anything to fit the old pipes some were imperial sizes and very difficult to get fittings to go on them

 

[d4nnyboy]

only problem you might have is getting anything to fit the old pipes some were imperial sizes and very difficult to get fittings to go on them

There're 8mm microbore, I used a digi vernier to check, 8.02mm approx , but thanks for the heads up...I done my homework on that matter and found this:

"The other imperial sizes do not have 'workable' equivalents metric sizes - joining these imperial to metric sized pipes require the use of adaptors specifically designed for the job (3/4 inch to 22mm, 1 inch to 22mm) - these adaptors are no more expensive than metric to metric connectors, they are just designed for the job. It does seem, however, that these adaptors are becoming less available; it's hard to find them on-line or at the major DIY stores, going to a 'proper' plumbers merchant probably gives the best chance for locating one.
Connectors"



So if I'm wrong and they are imperial I could hopefully find any necessary parts from my local plumbers merchants.......I hope anyway!