Sealed system air problem

Joined
24 Apr 2011
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Location
Bedfordshire
Country
United Kingdom
Seem to be getting an excessive amount of air in two radiators, need bleeding every couple of weeks. Boiler is two years old and a Worcester combi. Any ideas?? Didn't have an air issue before.
 
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Get a Tupperware dish ( not a glass dish) and bleed "air" and hold upside down dish above so it collects in it.
Take it outside while still holding it upside down and then light it with a match.
If it lights with a pop it's hydrogen.
You can directly light it coming out but it goes like a flamethrower and can light back to inside rad and go BANG so not recommended.
 
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Ps hydrogen gas proves the breakdown of H2O and means corrosion in these rads.
Would need chemical flush and inhibit.
 

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