Bleeding a radiator

Marty S

I know my radiator needs to be bled , I've loosened the valve with the key , how many turns should I do before I should hear air released , I have loosen about 5 turns , no air being released but afraid that the valve may come out if loosen any more

newbie2

Are you sure you're turning the right valve?

OR THIS ONE?

Charles Ingles

You should hear air after one turn sounds like you're turning wrong valve.
If you turned a few times you should have water leave alone call a plumber

Marty S

Thanks I have the top one , turned it around 5 times with key and afraid it might come out completely .

MrMusician18

Make sure only the centre screw is turning. If the whole plastic piece is then you could have a right old mess if it unscrews out.

Daniel!

Is the rad inlet open?

Marty S

Thanks , yeah just the screw turning plastic piece staying in place. Just how far do you turn it , as you say could be a right mess ..

John.G

Marty S wrote: »

Thanks , yeah just the screw turning plastic piece staying in place. Just how far do you turn it , as you say could be a right mess ..

You can turn the PLASTIC piece with your fingers, this is to change the orientation of the drain nozzle (normally, you want it pointing downwards) you just then crack open the slotted screw to vent the rad, 1/2 a turn or so should suffice normally, 4 or 5 turns means something wrong, vent may be blocked, rad valves closed etc.
Before proceeding further check expansion vessel pressure @ > 1.0 bar of if vented system check that you have water in the small (feed&expansion) tank in the attic.

Also have a look at this....https://www.boards.ie/vbulletin/showthread.php?t=2057964143&page=2

brightspark

If your system is pressurised is there sufficient pressure?

Marty S

Once the tad is working as in hearing up I presume inlet open is it ?

John.G

The inlet and the outlet valve must be opened to get a flow of water through the rad. Some rads have a thermostatic radiator valve (TRV) fitted to one end which automatically adjusts the flow through the rad to give the required room temperature, the valve at the other end may be fully open but if not is all ways open > a 1/4 turn or so to help balancing the flow through all the rads.