Metering tank scummed up and leaking from breather tube. Had same fault before and cured by changing tank.
Ordered and fitted 4071349759 doser tank. Now I get about 1/3 into the fill and water pi**es out of a window towards the bottom rear of the tank over the inlet spigot. This seems to be a modded tank as there is an extra (inlet??) spigot at the back of it. Am I missing something obvious as this fault didn’t show before? 😕
Hmmmmmmm 😕 Got my TDS disc out and the newer version of the doser is shown on that. From the diagram it looks like the rear of the two spigots is now the inlet and the one an inch or so in (where the old inlet was) is now part of an antiflow from the aquastop hoses. Will have to go back and swap some hoses I think :rolls: