Hi Is it possible to replace the inlet valve on a single radiator by closing all the other radiator inlet and outlet valves and drain feed to this radiator only without draining the whole system. Thanks in advance for any replies.
Central heating closed circuit.
- Thread starter Heidthebaw
- Start date
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You can close all the other valves so those radiators all remain full of water.
Then empty the rest of the system (boiler and all pipework) plus the radiator needing the new valve.
If the radiator in question is an upstairs one there's no need to remove any water in the pipework that's much below the level of it's valves.
Then empty the rest of the system (boiler and all pipework) plus the radiator needing the new valve.
If the radiator in question is an upstairs one there's no need to remove any water in the pipework that's much below the level of it's valves.
If it's a vented system, F&E tank in the loft, then you can bung the feed pipe in the tank, causing a vacuum in the system and can usually swap the valve out without draining.
If it's a combi system then you need to drain the main flow and return pipe to the lowest point level with the valve you're changing, after closing the other rad valves.
If it's a combi system then you need to drain the main flow and return pipe to the lowest point level with the valve you're changing, after closing the other rad valves.
Thanks Jackthorn
I had hoped not to empty the boiler. My radiators and boiler are all on the one level and I have just put a new radiator on and closed the flow valve end and had hoped to just reduce the boiler pressure by opening the flushing line briefly which is piped to outside the house. I presume any head pressure would make it impossible to work on the replacement inlet radiator valve.
The job in hand is having to cut the old 10mm plastic pipe to remove the old acorn fitting and replace by upgrade valve. BTW Replacing all system pipes is not an option at this stage. Thanks again from Heidthebaw.
I had hoped not to empty the boiler. My radiators and boiler are all on the one level and I have just put a new radiator on and closed the flow valve end and had hoped to just reduce the boiler pressure by opening the flushing line briefly which is piped to outside the house. I presume any head pressure would make it impossible to work on the replacement inlet radiator valve.
The job in hand is having to cut the old 10mm plastic pipe to remove the old acorn fitting and replace by upgrade valve. BTW Replacing all system pipes is not an option at this stage. Thanks again from Heidthebaw.
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