Refitting a radiator

Open vented systems

For sealed systems, seek the services of knowledgeable heating engineer

The connection between the valves and therefore the radiator is of the compression type. It is, however, possible that with age the fitting could also be a touch worn. during this case you’ll render it watertight using one among the subsequent methods.

Preparing the connections
Wrap a brief length of PTFE tape round the thread during a clockwise direction before assembly. Or –

Smear a touch jointing compound round the thread before assembly.

Both of those will take up any small gaps within the threaded section helping to seal the connection.

Lift the radiator up onto its brackets.

Manoeuvre the valve assembly at both ends in order that they sit squarely onto the radiator connections.

Hand tighten the nut onto each valve, taking care to not cross thread them.

Reconnecting a radiator
Tightening the valves
Holding the valve assembly with a tube wrench in order that it can’t be achieved the pipe, use a second wrench to try to up the connecting nut. this could be just tight enough to render the connection watertight. Excessive tightening may damage the fitting. Remember, you’ll tighten a joint if it leaks, but if it’s been overtightened, you’ll got to dismantle it and begin again.

Filling the radiator
Having tightened both connections, open the bleed valve at the highest of the radiator.

Now open only the flow valve at rock bottom of the radiator. this may be the valve used for turning the radiator on and off. this may allow the water to flow in, and air to be pushed out at the highest .

When the water starts to splutter from the bleed valve, close it.

Now open the return valve at rock bottom of the radiator by an equivalent number of turns wont to close it originally allowing water to circulate through the system another time whilst maintaining the original balance of flow.

Having left the return valve closed until the radiator is full, you’ll have prevented air from being pushed round into the remainder of the system.

Check both connections for leaks before allowing the heating to be turned on again.

Edinburgh Central Heating Services offer free estimates and range of skills. A 24-hour emergency plumbing service is also offered. For more information visit or telephone 0131 5102418