by screech »
Thu Sep 18, 2008 10:41 pm
what sentinel did you try?
if you tried inhibitor it'll do very little. did you use the system silencer?
do not put it in the tank in the loft, it'll just stay there unless you drain some of the system to get it in and circulating. best bet is to put it in a rad. system silencers do work quite well unless the noise is due to restriction or lack of water in the system due to a blocked cold feed in either case i'd recommend getting an engineer to sort it.
you can't powerflush a one pipe system, it'd have to be repiped.
a new heat exchanger is still available if it is only a 7yr old boiler. however without knowing what version your boiler is it isn't possible to tell how much it'd be. the heat exchanger would (depending on version) cost between £250-£400 then you'd have any others parts needed plus about 4-5 hours labour depending on access, system size, refilling ease etc.