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Can anbody enlighten me cuz there isn't much info out there on primatics. Here goes: Inside the hotwater tank is another cylinder . On the underside of the cylinder is a dome which is connected to a shaft which moves up and down, this allows the dome to move up into the cylinder. When...

Hello all. New to the forum and to central heating. Hoping one of you guys can help. We have Primatic heating system I've just discovered unfortunately too late. Let me explain. 2 of our 4 radiators weren't working, 1 upstairs and 1 downstairs, so I tried bleeding the rads to no joy, no air...