Hi We have had a loft extension done and heating doesn't work. We asked our plumber to have a look at it. He says the boiler (eco tech plus 831) on ground floor is fine to heat the loft for the number of radiators we have and the reason the heating is not working is because the pipes in the loft are 15mm and they need to be 22mm to get the water moving up there. He also said that there were too many bends in the pipes at the moment which were not helping. The original plumber is not sure that is the reason but he doesn't know why the heating wouldn't work. Any advise would be appreciated. Thanks
they did work when two of the radiators on the first floor were off but not anymore when they are off. (after they switched them back on none of the radiators on top two floors worked but now middle floor work again but not top floor). where would the airlock be - we have bled all the radiators. do you think bigger pipes would help? thanks
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