Descaling Heat Exchanger

[seaniedunnie]

Have a Biasi combi boiler and my plumber says the D.H.W. heat exchanger is clogged with lime scale. He has had little joy getting a replacement. Does anyone know what i could use to descale it myself. Can you use ordinary household descaler. I know how to get it off.

Thanks
Sean

 

[oilman]

Kettle descaler is usually citric acid, just what you need.

 

[kevplumb]

Kettle descaler is usually citric acid, just what you need.

formic acid you mean

 

[wilhelm]

or



cute

 

[kevplumb]

probably no worse than what you are drinking will

 

[wilhelm]

yep, i tell ya what , posting in this forum, you have to have ya wits about ya, .....which reminds me


or

 

[seaniedunnie]

Thanks for the help
sean

 

[kevplumb]

yerr in bath give the scruff a shout

 

[wilhelm]

cor blimey , you know

how much sir "sid" means to me....

 

[oilman]

Kettle descaler is usually citric acid, just what you need.

formic acid you mean

Er ...........no............I mean't CITRIC acid. Alright, I know, there ARE formic acid descalers, just as there are sulphamic acid descalers, but why have a relatively safe chemical around when you can have a toxic one? Er......... or perhaps the other way round.........

 

[kevplumb]

hard water area mate all we use is formic

can scale a combi solid in 6 mths here

 

[oilman]

Hard water here too, difference is, when I fancy a refreshing drink I can make some lemonade (with a little sugar), what does formic acid taste like? (DON'T TRY IT, ONE OF IT"S EFFECTS IS KIDNEY DAMAGE!!!!!!! Another is a useful explosive if you have some hydrogen peroxide about. Have you ever sat on an ants' nest? Or is ant squeezing a cottage industry in your neck of the woods?)