Still getting air in C/H after chemical cleaning!!!!!!

[JohnD]

I can't make out in the photos where the F&E pipe and the Vent pipe are, or why you appear to have two vertical pipes connected into an H.

Can you elucidate?

 

[giblets]

Do you have Belmont rad valves fitted on the return connections to the rads? They have grey caps.

 

[nairb999]

I can't make out in the photos where the F&E pipe and the Vent pipe are, or why you appear to have two vertical pipes connected into an H.

Can you elucidate?

http://i3.photobucket.com/albums/y66/cragga_lfc/dad/CentralHeating004.jpg

This picture is showing left riser from Boiler - top left going to vent - top right cold feed and bottom right into pump ( arrow on the pump pointing down

http://i3.photobucket.com/albums/y66/cragga_lfc/dad/CentralHeating005.jpg

This picture is showing pipes going to the loft where the feed/expansion tank is directly above

 

[JohnD]

So from the "H", both pipes go into the loft? LHS being vent and RHS being cold feed?

Some of the pipes look a silvery colour, do you know what they are made of?

 

[nairb999]

So from the "H", both pipes go into the loft? LHS being vent and RHS being cold feed?

Some of the pipes look a silvery colour, do you know what they are made of?

Silvery colour is paint - the non painted pipes are new further to removing blockage as described earlier

 

[mrgas]

Are you sure it is air in the radiators?
It may be Hydrogen caused by the breakdown of water caused by dissimmilar metals.
Do you have any aluminium radiators?
Collect some 'air' from the rads in an upturned jar and try lighting with a match.If hydrogen is present it will pop. Do not try and light the bleed nipple as you find you have created a blowtorch which is very hard to extinquish until the water comes out!!!I did this once and once only and burned myself badly

 

[nairb999]

Are you sure it is air in the radiators?
It may be Hydrogen caused by the breakdown of water caused by dissimmilar metals.
Do you have any aluminium radiators?
Collect some 'air' from the rads in an upturned jar and try lighting with a match.If hydrogen is present it will pop. Do not try and light the bleed nipple as you find you have created a blowtorch which is very hard to extinquish until the water comes out!!!I did this once and once only and burned myself badly

Not sure what the radiators are made of - they are magnetic if that helps.

Tried the match test directly on the bleed valve a number of weeks ago - fortunate for me no flame hence no gas

 

[nairb999]

Do you have Belmont rad valves fitted on the return connections to the rads? They have grey caps.

Rad valves are Myson matchmaker. Some have green deposits on the top and one is fairly rusty. No apparent water leaks though.

Example below

http://i3.photobucket.com/albums/y66/cragga_lfc/dad/CentralHeating012.jpg