how much do power flushing costs

[rhys21]

i've have a problem with my centre heating where i am getting air in the system, i have a y-plan system and i have no leaks can anyone explain why thi is happening. i have to bleed my centre heating every day.

[HowardKennitby]

Have you got the appropriate corrosion inhibitors in the system?

[jomifl]

For air to get in you must be losing water somewhere.

[jomifl]

Have you topped up the water? or does it do so automatically?

[Dodger666]

To answer your Headline:-

http://www.theanswerb...Y/Question514443.html

[The Builder]

I guess air is getting in from your header tank (in the roof) when it tops up the system As jomifl has said, it must be going somewhere. There are usually plenty of hidden places where it could be leaking.......... even the heat exchanger coil in the immersion cylinder. That'll just leak into the hot water system.
It could be worth having the system pressure tested. It's a simple job.

[buildersmate]

Just because it is gaseous, how do you know that it is air and not hydrogen? Hydrogen is one of the by-products of a reaction between water and the steel innerds of radiators and occurs when there is insufficient inhibitor in the closed-system water.
The other by-product is magnetite - black iron oxide sludge which collects in the bottom of the radiator and prevnts the water circulating.
Eventually (say after 10 years) the rads rust through from the inside and leak.

[jomifl]

Do not try to see if the gas is hydrogen by lighting it as it does not need much to give a very violent explosion. If you must, catch it in a poly bag and light it outside the house.

[Jemisa]

We had ours done a couple of weeks ago. all the sludge cleared and a power flush. It took two days in all (A week between visits) the final bill was near on £700. (Ouch) our boiler is 7 years old.

jem

[Plumberian]

It could be hydrogen, which is a by-produt of rusting. H20 becomes fe2O3 and then yourleft with H. Son;t worry about an explosion though, Can't say I've heard about it before.

It is possible that your pump is sucking in air through the vent pipe although that is not too common.

Whatever it is you do need to get ot sorted out before things go tits up.

Cost depends upon how big your system is, but use a specialist who should cost anything between £250 and £600. BG are expensive. Take a look at

Best wishes, Ian Pritchard

http://www.youtube.com/watch?v=gUJzxp_wXAU