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My dual top flush cistern is suddenly taking over 30mins to fill. It also makes a different hissing sound. :shock: I took the top off and think the holes where the water comes in are scaled. As I have no man to fix it for me unless I pay a plumber I wonder if there is a way to descale it...

Hi there I need a new central heating timer and the leaflet on my old one says it is a honeywell ST699B. When I do a google search and look round for prices a lot of them are just described as ST699 - without the B. Can anyone out there tell me if there is any difference between these two...