That'd be my bet, at least if those white marks are watermarks from the leak. Might also be worth checking if any of the 3 allen bolts holding the element cap onto the flange are loose.
I checked them all- done up tight.
I’ll have to buy the spanners - does anyone know the sizes?
17mm for both the pstat itself and the pstat pipe. You could probably get away with 1x 17mm and an adjustable if you have one.
@Dammit started
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That'd be my bet, at least if those white marks are watermarks from the leak. Might also be worth checking if any of the 3 allen bolts holding the element cap onto the flange are loose.