Recent content by candres

Laughed my @rse off as I read the last two posts. :lol:

Thanks for your further comments. I have used inhibitor, usually X100. I did discover very slight leaks, and corrosion, at several radiator plugs, and have needed to vent air/gas more frequently than I would expect. Also, I have noticed explosive "pumping over in the loft like a...

Many thanks for your help, guys. I may have overstated the first radiator sludge problem (more like a 1/2 pint!) but I checked another, smaller, radiator and got about 1/4 pint of reddish-brown sludge so I guess I do have a problem. I'll bite the bullet and follow your advice regarding...

Other than by professional power flushing can a CH system be cleaned out effectively? Is there any difference in effectiveness between the various brands of standard CH sludge remover ranging in price from c £5 to £20 per litre? Is it the case that normal flushing does not remove the...

Thanks, JohnD. Yes, it's a modern (?) indirect hot water cylinder, having a small feed and expansion tank in the loft to feed the boiler and heating. Boiler is a Potterton Netaheat 10-16 Mk11 F. System is over 20 years old hence I'm currently replacing radiators and plan to have a new...

Is there any reason why I shouldn't use my electric immersion heater while the central heating system is drained for replacement of radiators?

Thanks for your advice, Kes. All my threads and plugs are cylindrical/parallel, flanged. I had assumed it standard practice to put a few PTFE turns on all such radiator valve threads, threads only, but now I’m confused. Assuming I can get suitable flanged brass replacements (those I...

I recently discovered that several of my radiator plugs have been leaking slightly, with varying degrees of corrosion evident, and on inspection I have found that some of the plugs are steel, some are brass and some are chrome-plated. Not surprisingly the steel plugs have corroded most, but...