Cutting into rad pipes

[joelpeyton]

If I,ve got a F&E Cistern and I want to put a new rad in on the first floor, am I right in saying that I can just bung the F&E and close off the vent, which will allow me to cut into the pipes under the floor boards, or do I need to drain down the system downstairs first?

Thanks in advance

 

[Andygasman2010]

Bungs are just for quick jobs like changing a rad valve or a pump maybe. I'd drain down to do any major work.

 

[joelpeyton]

Andy, I was told that if I drained down the system then there is a good chance of getting air blocks, is this true?

 

[cumbriahandyman]

Andy, I was told that if I drained down the system then there is a good chance of getting air blocks, is this true?

Yes, but getting rid of one should not be much of a problem.

 

[Jazzynash]

Drain down is alot safe yes it may cause an air lock but this can be removed

 

[joelpeyton]

Best way to remove them if I encounter the problem? By the way when draining down should I turn off or leave open all valves to radiators?

 

[MANDATE]

Best tip is to run a bucket or two of water from the two valves before fitting the new radiator. If it's run off slowly any air locks will be removed at the same time the lost water is being replaced.
If you wish you can run the system without the new radiator to test it.