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Replacing radiator and valves on open vented system.

View the thread, titled "Replacing radiator and valves on open vented system." which is posted in UK Plumbers Forums on UK Plumbers Forums.

Hi,

I have a hot water tank, 3 header tanks in the loft and so I am assuming I am on an open vented system. I wish to replace a bathroom radiator with a wider one so will need to extend the existing pipework. I also want to tile around the pipework by drilling the tiles (for a neat finish) and sliding them over the 15mm pipes before attaching the radiator valves.

Can I isolate or turn off the water feed to the radiators to enable me to do this or do I need to drain the entire system? If so, how do I do this?

Thanks

James
 
Bung the f and e tank, keeps float valve in natural position. Drain from there. You could hold water in other radiators if you want, I would drain the lot. Do your work. Put correct levels of Inhibitor for amount of radiators you have, neutralise water, if you are pedantic. Fill back up.
 
Bungee the ball valve up in the small tank and drain the whole system carryout your alterations and tiling dry fit the rad keep the valves closed remove the rad fill flush then fill inhibit vent the system, you can then carry on with the bathroom grouting ect . Kop
 

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