Replacing towel rail valve

[Tipoff]

Going to have to replace valve on my towel rail as it sometimes leaks after the heating goes off not all the time.
I live in a bungalow and it’s a combination boiler, will I have to drain the whole system or can I just turn off all other radiators and just drain the towel rad and change the valve and refill?

 

[HERTS P&D]

Drain it all down, flush it through, replace the valve, new inhibitor, fill bleed and test.

Andy

 

[Tipoff]

Thanks for that, clear and concise, can you give me some idea how much inhibitor I should use for 7 rads in all?

 

[HERTS P&D]

You would need one of these:

https://www.screwfix.com/p/sentinel...VMIBQBh1r2QCSEAQYAyABEgJuP_D_BwE&gclsrc=aw.ds

Andy

 

[Tipoff]

Thanks once again