Back boiler still kettling after cleaning

[heheshamon]

I put some cleaning fluid through my system about 6 weeks ago and drained down at the weekend I ran the heating until the water was clear but after filling I still have kettling when only HW is running.

As far as I’m aware the HW is heated by gravity as I cannot see a valve only the pump.

Am I missing something when cleaning this type of system or have I not run the system enough? Should I have let the system settle then run the heating again to remove more dirt? Should I shut the valves on the other radiators then run the system to force everything out of that drain?

What other options do I have?

It wouldn’t be so bad but the pipes come under my bedroom floor and obviously the boilers in the living room so it’s hard to get away from the noise.

 

[hammers4spanner]

Power flush required by sounds of it

 

[Harvest Fields]

What boiler is it? If it is only a slight kettling you may get away with putting some silencer into the system.

 

[Last Plumber]

If it’s an older boiler with heavy kettling there’s nothing much you will be able to do.
Try harvests suggestion just in case it can be quietened

 

[moonlight]

I had similar with hot water on a older boiler partially blocked pipe work. sludge had settled in the bottom on the flow to the cylinder.

 

[Harvest Fields]

I had similar with hot water on a older boiler partially blocked pipe work. sludge had settled in the bottom on the flow to the cylinder.

Did you manage to fix/sort the problem out?

 

[heheshamon]

Thanks for your replies yes it’s an antique but it doesn’t cost anything to maintain in 12 years we have only had to replace thermocouples and a solenoid.

Has anyone ever used the over flow and a compression fitting and hose pipe to flush the other way? Is there any reason this could not be tried?

 

[jtsplumbing]

standard cleaning fluid is no good for getting rid of scale, it needs a proper de-scalar (Acid) in system have a look at Kemco product's

 

[hammers4spanner]

Thanks for your replies yes it’s an antique but it doesn’t cost anything to maintain in 12 years we have only had to replace thermocouples and a solenoid.

Has anyone ever used the over flow and a compression fitting and hose pipe to flush the other way? Is there any reason this could not be tried?

Yes not great way of doing it tbh