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Unable to pressurise boiler

View the thread, titled "Unable to pressurise boiler" which is posted in Boiler Advice Forum on UK Plumbers Forums.

Hello,

New to the forum, just looking for some advice please. Around a year ago I had a worcester bosch 4000 boiler fitted as my old one was leaking and worked on and off. It's been great but I have recently noticed that the radiators are giving out poor amounts of heat upstairs (all had new thermostats fitted). I decided to bleed them today and alot of air was in the system which ofcourse caused a drop in pressure on my boiler. My old boiler was easy to refill but this one seems to have no tap, lever or anything that I can see. Just wondering if anyone can give me some advice as right now it's at 0.4 Bar and I wouldn't want to cause any damage. I've posted some images of the underneath, thank you.
 

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Nope no filling loop there your looking for a flexi pipe with one or two valves
 
Yes make sure the valves are off eg not inline (horizontal)
Great thankyou, will give it a go tommorow. Just find it a bit odd why the installer decided to remove the filling loop and cap the ends off. Manual shows my boiler should have one of those easy fill loops fitted (in those 2 images) but guess not.
 

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