Central Heating Problem

[wellright]

I'm continually having to bled daily at least 2 x radiators on a conventional 20 year central heating system, where is all the air coming from, how do i stop the problem

[pilotlight]

wellright, If the problem is only recently starting to show on a 20 year old system, I would assume that you can discount a "design problem ". The most probable cause is that hydrogen is being created in the system by corrosion. To overcome this, you would need to add a type of sludge remover to the system ( available from plumbers merchants, large diy stores, etc. ), ensuring that you adhere strictly to the manufacturers instructions. If the corrosion / sludge is of a major proportion, your system may even be in need of a " powerflush ".

Another possibility is that you have a small leak/leaks on the system. This may seem strange, but as a minute amount of water is displaced from the system, air finds its way in !

As pointed out earlier, I would discount a design problem ( or possible pumping - over ), as your problem is only begining to show after 20years. Unless you are very competent re plumbing, I would suggest calling in a heating engineer.

[Hard@it]

o up to your header tank and check if water is coming out of the "open vent" into the tank, if it is not check and see if the water in the tank is hot, or if there is red rust in the tank. this means either your pump could be adjusted or if you have had it replaced could be on wrong way. Also check if that your ball **** is dripping and the level is not high, this could indicate a possible leak under floor or somewhere not obvious !

[Hard@it]

sorry ballvalve

[wellright]

thanks for the advice, have tried solutions but problem remains, any other possible advice please.