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closed the far left black valve and the far right black valve. i guess the middle (slightly to the right) black valve is the water feed? I have left this open... Eddy

thanks Stormer - i will try that...

my job for tomorrow is to find this pblasted leak and try to fix it!!! today i am trying to narrow my search. i swithed the far left (original post photo) black valve to 'off' - i am assuming this is where the hot water leaves the boiler on its way to the radiators. i did this and then topped up...

Gigz - where would i add that? Eddy

all timber floors! i will take them up and look at where there are joints and see if there is seepage... Thanky uo ever so much, i think you have all taken me as far as you can and now it is a case of finding the leak :( thanks again Eddy

it is now almost half an hour after the previous test and the pressure has dropped to 1.25bar - i cannot see any signs of any dripping from the pipe outside or from any of the radiators :( Any further ideas? best way to go about finding a leak?..... Eddy

Rightio! This is the next installment!!! hehehe I (almost) did what gigz suggested above, except i remembered it incorrectly and bled the upstairs rads first, when i realised (after doing the downstairs ones) i re-did the upstairs ones! So i topped up to 1.5bar, bled the rads and it went down...

Many thanks Gigz, i will do that today and let you know what happens... you must feel as though you are walking a child through this!! hahaha. thanks again Eddy

Thanks gigz - how would i rectify that? this is the only thing that has changed on the system since it was installed so i have been thinking that i have not done the radiator replacement properly.... The pressure still drops - sometimes slowly - sometimes quicker. Eddy

Silly Me! the rads are now heating up! i will check back in a bit and see if the pressure is still in the green... Eddy

alright then! so i went round all of the radiators (again) to check all the pipe connections....i fiddled with a bleed valve on one of the radiators that i took off the wall a while ago. I loosened it, water hissed and came out so i closed it again. I then turned the TRV onto 5 - it had...

so..., the pressure remained the same as when i topped it up. then i switched the black valves open again and the pressure immediately dropped about 0.5 of a bar and i heard gushing noises as though water was travelling somewhere! Does this mean i have to search for a leak along the pipes?.....i...

Pete, i have turned the black vavles after re-pressurising the system - will check back in a bit and see if it hs dropped again. Eddy

Thanks for all the replies, so i topped up the system and we haven't used the hot water or heating, the pressure guage is dropping and i have checked all the visible pipework at radiators and pipework above the ceiling and cannot find any leaks. It does not look as though there is any dripping...

thanks again. It has dropped again! we don't have the heating on but we are using the hot water tap - does this mean it is likely to be a leak on the hot water supply or could it still be anywhere??? what is the best way to try and locate the leak - just trawl everywhere for leaks?.... Thanks...

thanks Joe :)

I have underdrawn my sloping roof rafters with 50mm insulation, i'm fixing 9.5mm plasterboard through the insulation to rafters - i have purchased a tub of 5x75 multi-purpose single thread screws from B&Q - will these be ok to use or shall i go to screwfix and get some 75mm drywall screws? What...

thanks very much - i guess they are closed as the are perpendicular to the pipes they are on? if the pressure drops again - do you think i might have a leak somewhere? how do you find it if there is a leak??? thanks again Eddy

Hi everyone. i have looked online and i cannot find any description of re-pressurising what my boiler looks like underneath! I have attached a picture and i am unsure what i need to do. I beleive i need to turn one or both of the blue taps but i am not sure how i can tell whether they are open...

I have spoken to a friendly local builder who assures me that 50mm celotex between the rafters and 32,5mm insulated plasterboard across the face of the rafters is sufficient insulation on the sloping ceiling part. He evaded the question about what is needed in the knee wall! I was thinking of...