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blue control valve on outlet? I have never heard of this before? There shouldn't be any controls on the h/w return ! confusing reading this post! :)

that's a new one!! never knew banging an ajdustable would help open a nut/spindle/valve! Might have to try that in future if a tap headgear nut is stiff and won't budge! I suppose it shocks it out of position and loosens it?

thanks for helping Paul. Really appreciate it. I was reading a central heating fault finding & repair book, and the only section i wasn't understanding too well was the boiler section (for obv reasons)! What I was trying to work out is the starting sequence for a gas boiler. Another...

not unless he has a cold tank fitted in the loft to supply the cold! good point though - the combi should surely never have been installed with flow rates like that!! he can't even flush the loo without the hot water stopping/slowing!! very bad!

a bath/shower mixer would be easier and cheaper !!

space-i am just trying to learn about boilers as i am interested. sorry if my question made no sense or stupid.

namsag you are right there - the baxi solo he is a condensing. coneventional are not condensing and also many if not nearly all have permanent pilots! sorry

baxi solo HE

thanks possum_jenkins: i have actually seen that book, it's by john reginald. i read the central heating book by him and it was very good. i will not be touching anything inside my boiler or anyone's boiler, i am just intersted in how they operate and want to learn. thanks again for...

thanks possum_jenkins. from a baxi boiler manual i was reading it has an electrode kit (spark & sensing) and i was trying to confirm wheteher this was the flame supervision device which preveted gas from getting to the burner if the flame went out!

namsag - from what i was reading the thermocouple was different to the flame supervision device which prevents gas flow to the main burner.

do most conventional boilers have a multfunctional gas valve which includes a solenoid valve, thermoelectric valve and thermocouple? which which allows gas to to the main burner? Also do they also have a flame superision device which prevents gas to the main burner if the flame goes out for...

Has anyone ever cut a tap washer slightly to allow it to fit a tap? I have been trying to change my pillar tap washer and the washers I have (black rubber type) are all slightly too big for it. Some are different thicknesses also. I am only talking of mm here but I have heard you can cut them...

sorry another typing mistake, I meant to say when I turned the stopvalve back on it was the same as before. Sorry :oops:

sorry it was my fault the way i worded it, making you think I was talking about the cold supply!! :) Is there any way I can find out the extend of the blockage/problem etc ? None of my rads are leaking. I wonder why only the top rads are blocked / sludged up (possibly) and not the...

I think you are getting my posts mixed up! I know the feed/pipe from the bottom (base) of the F & E which tops up the CH / Primary circuit is the COLD FEED. When I said if it tops back up it is not blocked, I meant if the F & E tops up the CH/PRIMARY circuit pipework when water was drained...

sorry i did not sponge out the f & e. I just closed off my main stopcock which supplies it. and drained from downstairs for a couple of minutes water into my gulley. it came out ok. and the cistern level was the same when i checked. should i do it again in the step by step order you...

just done it and the water does top back up. so not a blocked feed?? (well it can't be) what could the problem be? could it be sludge in the rads? it has only started happening (or so it seems) recently, but maybe it has been building up over a period of time...

when i bleed the upstairs rads the water doesn't come out, one of the rads had a trickly but then nothing. downstairs they bleed, and the water is black. is this a cold feed blockage????:(