Can a WC overflow be plumbed unto a sink waste-pipe without raising issues with surveyors and building inspectors? If so, How about into the WC's soil pipe? I guess running it through a wall to spill onto a public pavement would be a no-no, since it could turn to ice on the pavement and cause an accident, right?
I once saw one WC overflow that ended inside an ajacent shower cubicle. Is that considered acceptable?
Thanks
James B