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Hi John, yes it was sentinel x100 i thought that was the right chemical, the guy in B&Q advised !! I turned off all the warm rads and none of the existing cold ones did not get warm. Both the flow and return pipes were hot as was the pump.

:lol: will this sort it though tamz? i think i must be nearly there now, plus it hasn't been flushed since changing the pump last night!? if that makes a difference

i'm spending a fair bit of cash on chemicals this year but if it needs to be done then I'll flush it. I take it, you flush the system be releasing the water out of the drain tap but keeping the top tank tap running (ballcock not tied up)!? lol - how do i flush the system? :oops:

right...bloody hell this is doing my head in, surely CH can't be that much of a mine field. Just turned all the warm rads back on as it didn't alter the cold rads downstairs at all. :x

sorry no....say 4 metres

i used sanitech x100, well i think thats the name of it, i'm in the process now of turning the warm rads off and cleaning the magnaclean - will report back. the magnet does have a fair amount of crap in it. The pipes coming out of the boiler only go down, except the flow pipe which does go...

your looking at about 6-7 metres on this house

sorry for the delay John, i'm now having to sort the kids out and now I need to go out for a while, will report back shortly! Thanks for your help again

the two red shut off valves are the flow return for the loft upstairs, the loft return is the last rad before the return back to the boiler, i've installed the boiler buddy (magnaclean) after that.

- pump fitted on the left hand / flow pipe - installed upside down like the other to match the flow - poor picture but that's the boiler buddy[/img]

I have noticed water pumping out of the venting pipe, and yes I cleaned the header tank and added chemicals before re filling. Both the flow & return pipes are hot yes. basically the boiler, pump, cylinder is in my bathroom up stairs so the pump is having to move the water over three...

I've installed flowing the way the old one was flowing, it's connected to the left flow pipe. Hang on I'll take some pictures

not alot :?

Hi John, yes the mangaclean valves are still open as I've only just installed it but the amount of rads that are working has changed again, now all but two (5 out of 7) upstairs are warm, not boiling but warm - and all the downstairs ground floor rad's are cold. The loft rad had the most air...

all the radiators are now cold...everything on the boiler and pump seem fine, kickin in as they should but no heat in radiators. Do i need to leave the system to settle? this is doing my head in.

well happy to say i've installed the pump and mangaclean unit, sounding a lot better, I have a couple more radiators working but annoyingley not all of them. All the bottom floor bar one are all not working and a couple on the 1st floor aren't getting hot. Checked all the trv's and all the pins...

Ok guys, So what your both saying is that the magneclean needs to be on the return which is the right pipe? Kev what do you mean by saying the pump is ass first? is it flowing the wrong way?

Firstly thanks for all the replies! Mystery man, thats the first thing i noticed with the new pump, when it's fitted all the electrics will be at the top of the head so that's a good start.

Hey John, after a summer of not neediong the heating I've finally got round to nuying evcerything I need including a magnaclean. It says the magnaclean needs to be on the return pipe to my boiler. Am i right in saying the return pipe shoul;d be the one that's cold? The attached picture is...

Foot is street for a gentlemen! Come on John, calling you a legend would be a bit over the top, wouldn't it? :wink: Thanks again fella.