SN/SNU unit leaking
Check that the unit has been fitted correctly. It must be fitted with the tap/spout supplied or a special vented/open tap. Not suitable for more than one outlet even if used with pressure relief/expansion kits.
A vented tap is a tap with three pipes. One pipe connects to the cold water supply, the other two pipes connect to the unit. The unit will not work with any other type of tap and will leak if the installation guidelines are not followed.