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[Taxi_Driver]

But my gas bill will go up now!  
Since ive had the CH on this year, none of the rads upstairs have worked....all cold and no airlocks in them.
Ive been using a portable gas heater in my bedroom when its been really cold  
I had a rad moved a couple of years ago and have been suspecting that the useless plumber didnt put any protector back in the system when he refilled it. Its all microbore piping....and i thought that it had sludged/furred up on the pipe/s running upstairs.

I added a de-sludger/de-scaler via a rad downstairs (aerosol can) 24hrs ago. So much easier than draining the system and climbing around in the loft.
This morning all the rads upstairs working now  
Just need to flush the system this afternoon.....and add a can of protector via a rad.  

Ok the aerosol kits are a bit more expensive.....but saves climbing about in the loft......esp if it isnt boarded....and seem to do the job  

[TheBoy]

Result

Related Q, are you supposed to regularly add inhibitor, or drain down and replace? Been in my house 8yrs now, should I do it?

[Debs.]

I once read that (leaving aside acid-flux and wire wool residue form the installation) it`s mostly the acidity of the CH circuit water that causes all the rust and (associated) sludging....with scale (caused by temporary-hardness) being only an issue 'once' upon first filling; providing `the system remains in steady state with regard to leaks/top-ups......so, perhaps if you just have access to sufficient demineralised (or distilled) 'neutral' Ph water to refill you might save much on those costly CH inhibitor chemicals.

[Taxi_Driver]

Result

Related Q, are you supposed to regularly add inhibitor, or drain down and replace? Been in my house 8yrs now, should I do it?

I think its suppose to be yearly  :-/ Tho im sure a plumber/heating expert will advise.
If you use one of these aerosol kits no need to drain the system down.
The kit i used was Wickes own brand, called rapid dose.
They do them for open-vented systems (like mine) and sealed systems.  Bout 20squid for an inhibitor kit   If you are going to descale/unsludge as well, you dont need a kit, just the aerosol can, as you can use the kit from the inhibitor kit......bout 11 squid for the aerosol on its own