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I know this is dragging up an old thread but I am embarking on something similar and wondering the same things? I thought for my 3.5m x 4m shed I would need a slab of 3.8m x 4.3m and a sub base of 4m x 4.5m...effectively like a pyramid so it's all supported effectively?!

Yes everything was explained on everything I had done and everything that I thought so he could make an informed decision on what he thought the problem was, unfortunately he either didn't listen or didn't care! All I know is that I will be making a complaint to the company. As far as I'm...

Well the hearing had been on about 80% heat on the boiler for over 20 minutes and stayed steady at 1.7 bar on the system gauge. Turned the heat up to 100% and slowly crept up to about 1.9 bar. Checked the expansion vessel and was reading 1.0 bar when the system was de-pressurised and when the...

Thanks for your advice and help so far everyone! Another update: After refusing to believe the "plumbers" that the expansion vessel had gone I went about my own work this evening. I removed the braided hose that goes from the back of the pump to the plastic "T" manifold which feeds the...

Right well to update this further: Had a plumber out today and he serviced the boiler and said chances are the expansion vessel pressure is too low. He said before fitting a new one try increasing the pressure to 1.5bar in the vessel and see if that does anything. Well I increased the...

Right after feeling like I wanted to smash my boiler up last night I had a sleep on it. Rang a central heating plumber who is coming next week but in the meantime drained the system to clear the x800 out. When the system was empty I checked the pressure in the expansion vessel at 0.8 bar...

n Sorry forgot to answer you. The boiler worked fine with heating in Apr just gone but heating was first fired up again after I had drained and refilled it and uses the original expansion vessel behind the boiler. We haven't added any rads into the system, we have 6 type 11 rads, one...

I checked with sentinel this morning about the x800 and they said the new stuff they do can be left up to 7days in the system so I'm okay there. When I first pressed the valve a tiny amount of mist blew out for about half a second and no water at all after that. Maybe a blocked tube to...

Hey all, sorry this is my first post but a bit stuck here really as I'm having a problem with my Worcester 28i Junior combi boiler. It has been working ok since we moved in a year a go apart from a rad once had a few cold spots, suspected dirt in the system. It hasn't been run other than hot...