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Old 01-16-2005, 01:10 PM   #1
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Air in radiator


Hi I always seem to get air in the first radiator away from the pump, it has to be bled at least twice a week, any ideas ??? :confused:

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Old 01-17-2005, 12:36 PM   #2
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Air in radiator


If you have an open system (feed & expansion cistern in the roof) the pump may be pulling air down the vent pipe if the vent pipe is incorrectly positioned, or there may be a leak in the pipework on the negative pressure side of the pump (through valve stems ect). It may not be air at all, if there is no inhibitor in the system it could be hydrogen but I doubt you would have to bleed the rads twice a week if this is the case.

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Old 03-11-2005, 09:58 PM   #3
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Air in radiator


There is a little valve you can install on it that will take care of the bleeding issue... I'll have to do some research on it to find one though..
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Old 03-11-2005, 11:58 PM   #4
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Air in radiator


A auto bleed valve like this can be installed in a higher part of the system that is getting air. Mount the valve upright. The Watts model FV-4-1/8 or FV-4-1/4. I would prefer the use of the smaller one 1/8 may take a little longer to bleed but it is being used a maintenance bleeder and size shouldn't be a issue.



link to valve


Grainger does not sell to privet parts so go threw work or something. They need company info to sell to you.
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