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After thinking about the history of steps which I undertook and the results, I am still hopeful that there's an obvious problem which is easy to resolve, rather than that the boiler has packed up. I say this because whenever I touch the front panel of the boiler, it is warm even though there is...

Desperation with snow on the horizon.To quote your favorite detective:"When you have eliminated the impossible, whatever remains, however improbable, must be the truth". Since we have (as far as I can see), eliminated the non-boiler problems, only the boiler remains. as a souce of remaining...

The new braided coupler tubing from Screwfix was successfully installed. Before doing this, I opened the water mains stopcock in the kitchen and confirmed a good flow from the flexible grey plastic mains water feed pipe. The EV was completely empty. It was removed, its air bladder pressurised...

Its been a busy day at my end. But now I'm finally able to type a response to all the posts after #48. I managed to get the name of the installing plumber, by searching through my emails. Rang him up, he couldn't remember the manufacturer of the PRV but said that he bought it from Wolseley. So...

@BlueLoo Thank you for taking the time and making the effort to walk me thru' the entire process. I really am grateful for the clear explanations in post #45. I have a confession to make. Earlier this winter, when at the end of my thether with the time it was taking to pressurise the blooming...

I just checked while cooking supper. There's a stopcock under the kitchen sink. one inlet and a 3 branched outlet. One branch goes to the kichen cold water tap. and the other two disappear under the kitchen tiles to God knows where. From the discussion so far I'm assuming that one of the two...

Thank you Terry, I know where it is in the pavement outside, the little white plastic wheel. But what I cannot remember is do you turn the wheel clockwise or anticlockwise to shut it? EDIT: And once the mains is shut, open the cold water tap in the kitchen sink to drain out any remaining mains...

@polesapart, BlueLoo, Harry, Marty: Thank you Gentlemen! Unfortunately other committments prevented me from tracing the source of the flexibe grey feed into the expansion tank. But many thanks PolesApart for your clearly explained & helpful post #37. I picked up the filling loop from Screwfix...

Well if it had, then how did the setup work for the three years immediately following the installation of the EV? I never realised how complex troubleshooting in plumbing was! Its like hunting submarines, or solving murder mysteries. You have my respect gentlemen! I recently completed a Level...

Thats brilliant! Thank you Harry! How thoughtful of the forum Webmasters.

@BlueLoo Please continue going out on such limbs! I'm calling it a night as far as loft expeditions are concerned. Last thing I need is to fall down between the floor-boards a couple of hours from midnight. But tomorrow is another day and I'll definitely trace the pipe.

Harry said: I would doubt that, unless there is a big height difference between the pressure gauge and the water level, in your tank. Easy way to trace that pipe, would be to have someone tap it gently, whilst you try to trace it. Thank you Harry. I too was wondering what could be changing in...

Which NR valve are you talking about Terry? Please mark it if it appears in one of the photos which I've uploaded. EDIT: Trace the source of the plastic pipe that connects to the isolation valve. I have. Read the 1st paragraph on past #23, the source is the Loft tank. The Isolation valves (there...

terryplumb said: You have a complete misunderstanding of your plumbing set up. At...

Here we go: IMG_8349 is a photo of the front of the plastic loft water tank (coffin), showing three of the four connections to it. The Uppermost inverted L shaped PVC pipe lagged on its vertical section, is the cold water mains feed. This enters the tank through its left square top hatch. The...

Harry asked: Has he fed actually fed it from the loft tank, or maybe he fed it from the cold water feed to the tank? I'm not sure. I'll go up to the loft & check.

terryplumb said: Is the silver coloured braided flexible hose in your pic severely bent downward,close to where it meets the red expansion vessel...

Could you post pics of your airing cupboard showing your cylinder, filling loop and expansion vessel? You read my mind BlueLoo! I have just returned from doing so. Please find attached. What I cannot understand is this: From what I've read on line, the expansion vessel (EV) is normally...

BlueLoo said: So either, you have a massive leak (you don't because your pressure would drop instantly) or, what you think is happening when you top up, isn't. I can only think that the mains water is ****ing out of the PRV or back filling up this tank in the attic (past overflow?). Or you have...

@polesapart Thank you. I quite agree that the installation isn't a pretty sight - the installing plumber was a Checkatrade man, and came highly recommended. This same man, banged into the rusted steel loft tank, and managed to make a penny sized hole in it, water seeping down, wallpaper &...