We have removed the bleed valve from our radiator and nothing comes out.?

Question

Hi All,

We have removed the bleed valve from our radiator and only a tiny trickle of water is coming out. It is always cold and both valves are open. Is there anything we can do before having to call out a plumber.

Cheers

Chris

Answer 1

sound like you need to fill them back up, have one person stand by the boiler and one by the rad, as one fills water from the loop in the boiler the other should drain air from the rad. good luck xx p.s keep an eye on the pressure bar on the boiler dont let it pass 1.5 bar

Answer 2

what you have to do is to turn off the radiator valves. then undo the complete bleed screw and the large nut it is fitted into. When you unscrew this, you may have some water dripping out, so be ready for this. Next , take the whole thing to a plumbers merchant or DIY place and get a complete replacement. You should have a new fibre washer supplied with the fitting. Make sure before you fit this part that the face of the radiator where you will fit this is clean. Remove any old sealant etc. Then screw in the new part and turn the radiator valves back on and vent any air from the radiator.

Answer 3

Yes, put the bleed valve back in , and check the water pressure on the boiler. If it is below the mark, top it up to the mark and check your rad then. If water on boiler is okay, you will have to open a radiator valve to get air out of the pipework. But first you must drain out the rad, so turn off bothrad valves by turning them clockwise. Now, Get a big enough spanner, and Turn the big nut on the rad, on the left side,anticlockwise until water starts to trckle out. Keep something under it to catch the water. If the water stops, open the bleed valve to keep it running. When the rad stops running, Open the rad valve and let thr water run into a bowl until the water is hot. Then replace this valve , and undo the other valve by turning the big nutclockwise. Go through the same procedure, and reconnect the valve. then shut the bleed valve and open the rad valves to refill the rad. when rad stops filling vent air and check heat on the rad. When refilling rad check water pressure on boiler . if the pressure goes too low, you will draw in air again.as you refill the boiler.

Answer 4

Really does depend on the type of system. However, if it is a combi boiler system, check that there is pressure in the system, if not repressurise and then try bleeding again. If it is a conventional system, try bleeding with the pump off as it could be a negative pressure system. Failing this, check the header tank to see if there is water in it, if there is water in it, you will probably have a blockage in the cold feed to the system. Unfortunately this will need a plumber/gas engineer. Good luck.

Answer 5

your question is vague as to type of system, my guess is your rad was cold you tried to remove the air, nothing came out. if it is a combi boiler and you have pressure your rad valves are blocked and need replacing or your rad is sludged up at the bottom which needs taking out and flushing through, same if it is a gravity fed boiler, but check you pump is running ok

Answer 6

Check that the small header tank in your loft has water in it.
It is possible that the ball valve has stuck and not causing water to enter. check the header tank before calling a plumber. If you live in the South Norfolk area then email.

Answer 7

your drive pump is not working, the trickle of water is from the header tank via the pump , sorry but its a new pump or check the fuse box it may be the electric motor that drives the pump has blown the fuse (or circuit breaker ), if all other rads are cold. if not your rad is blocked ( brown goo in with the trickle rusted up in side ) and thats a rad change

Answer 8

Make sure the pump is not running. This can cause a negative pressure that will pull air into the system.
If you have a combi boiler, you may need to re-pressurise the system.

Answer 9

you only need to open the top bleed valve as it works on pressure. also you start with the radiator furthest from the boiler and work closer

Answer 10

Turn off the other rads to see if this pushes water into the one you are working on. If it doesn't it could be silted up, so replace or flush system.