please help boiler kettling !!!!!!!!!

[Darran]

:38:

My boiler has started kettling and i want to put some additive in, I have a conventional heating system with a combination cylinder in the airing cupboard with no expansion tanks in the loft

this cylinder has a built in header tank and in the header tank is a small second tank which i think is the fill for the central heating as the outlet is 15mm pipe which then goes into the 22mm heating pipes by the pump.

I think this small tank inside my header tank is where i would put the additive but i'm not sure.

Could somebody please let me know if this is correct.

Thanks

 

[Darran]

this diagram seems about right, but can i put the additive in this inner tank or will this contaminate my hot water

 

[lame plumber]

looks to me that both the systems interconnect, so I wouldnt be pouring cleanser in any time soon, also where would you pour it in to get into the heating side. you may well do better to get a flush done on your whole system by a professional, who will need to isolate the cyl and tank side to do it.

 

[Unregistered]

the pipe that goes into the top is loose and can be pulled out to gain access to this second tank, this is where i think you could put the additive but im not sure how this connects to the water supply inside the hot water expansion tank.

thats what im worried about

 

[Geyser]

A rare beast thank god! Fortic f4. Heating takes water from main tank through pipe in bottom of little tank. Cant use chemicals as could contaminate cylinder. Could isolate heating/boiler to flush.

 

[Geyser]

Dont just dump chemicals in top or your next bath could be interesting!!

 

[turnpin]

Not seen one of these before......where's Tamz when you need him ...lol regards Turnpin:smilielol5:

 

[Chalked]

It shares a common feed tank. Even though it has a seperate vent, it will expand down the cold feed into the hot water cystern.

 

[JCSPLUMBING]

My old house had this system. I binned it for a Vaillant combi. Even put a towel radiator inside the airing cupboard for the wife.

 

[Darran]

thanks for all your replies and help.

Now need to decide to flush the system or change to a combi (major Expense)

my system is old but has always been reliable.

????????????

 

[Darran]

What i dont understand is why some days it is quiet and some days it sounds like a heard of elephants coming through the house.