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Chris R A hughe massive thank you. It took me several attemps and three days to do but i have finally balanced the system succesfully and all radiatirs now get hot. I also turned my pump down to speed setting two which seemed to help. Thankyou to everyone who posted a reply, now all sorted...

O.K i have purchased a thermometer (no more guessing) and plan to do this to the letter, on initial investigation one side of the radiator pipe seems hot and the other seems cold on some radiators. To counter act this do i open the flow or restrict it? Also am i aiming to get the hot pipe cooler...

I think i have it right because i have done as per web instructions with the exeption of the thermometers, would you say that these are esential, if so where can i buy them from and how much are they likely to cost? Thanks for all your help and advice on this it really is appreciated :D

When mixing i use a mixer that goes on to the drill, it takes the hard work out of the mixing just be carfull you don't mix it too fast, and run your drill afterwards unloaded to cool it down!!!

i would always use timber (don't like the wal in a box idea) make sure the timber is wide enough to accept adequate insulation and a lways use the thicker plasterboard not the 9 mm rubbish. I also screw the plasterboard to the wall with plasterboard screws. this stops the board from flexing and...

Brett I would agree with Andy, remember to leave the bonding plaster a little lower so that you have room to put the finishing plaster on this way you can taper it like Andy suggest. I have used patching plaster in the past and really don't rate it

Chris R Thanks for the reply, i have tried this on serveral occasions and although i have not actually used thermometers, i think i have got the balancing right. What did puzzle me a little bit was the TRV's does it matter if they are on the flow or return, mine seem to be mixed (I know you...

Thanks for all your help so far, the original pump on the system was free but i thought i would change it just in case, this has made no difference

I'm no expert, but i have just had an extension built (controlled under building regs), in my experience if they are not happy with all aspects of the build they will not issue the notice

I know how you feel, i done exactly the same as you through the FMB website, the whole thing is a joke, i would not bother with it again. My advice would always try to hire a builder that a friend has used and recommended. There are loads of good builders out there who have nothing to do with...

Andy You will need to buy bonding plaster to go onto the brickwork and build this level with the existing, you will then need finishing plaster that is applied thinly to give you the final finish. This finish can be polished as it is drying. I find if you seal the walls with unibond or...

How would i rectify this?

If i close the other ones of the remaining rads do get hot, but i have bled about 20ml of water from each rad and there does not seem any air in them, i have also bled the pump and opened the bleed valve in the airing cupboard by the pump, but to no avail. Some one mentioned to me it's...

4 rads have been added there are 9 rads in total (including the new ones)

I checked this and all seems free, any other advice?

Sorry to sound vague, two rads are the new ones and two are old

Thanks for this i will check tonight and let you know the outcome. Thanks for the advice, the help is appreciated

I have got some rads working so i assume so, but can't say for sure

I have 4 rads out of 8 getting hot so i assume the flow and return are not isolated, is this a fair assumption?

The pump sounds like it is running but is there a way of checking to see if it is free