Old system air problems+noise

[Yardmaster]

hi guys

i have a open vented system

radiators where cold at bottom, so i removed them all and flushed them out, true enough they where full of dirt

anyway, i seem to have a radiator that needs constaint bleeding, that was ok so i replaced it with another one, a

no difference needs constaint bleeding everyday, obviously air is getting in somewhere, any ideas?

also you can hear a flushing of water everytime you turn the heat on only on this rad.



also on another issue the mains pipe going up through the hot press, is making vibration noises, this never happened before. so i tried turning down the pressure outside but still no joy.

 

[Rickster123]

Are you venting the radiators with the system switched off?

 

[Yardmaster]

Are you venting the radiators with the system switched off?

both on and off, only seems to be effecting the first radiator from boiler.

 

[AWheating]

could be the way the system is piped up. wheres the feed and vent connections?

 

[diamondgas]

:iagree: system may have a restriction or the pipework is configured incorrectly? draining down can increase the likelihood of problems occurring ...!