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Are there any weep holes around the drain above the collar but below the grate to allow the water that passes through the grout to escape?
If not then it's a crap design, you'd end up with a lovely pool of stink in and around the drain 😱I'll be amazed if there are!
No run off holes below the tile line. I'm going to have to build up the whole tray area basically. Not ideal but that's it. It's for a regular fitter I do jobs for, he uses whatever is supplied really, I've explained how Crap it is. It's got a large collar that goes into a recess on tray and you tile over that, (under the tanking) it won't leak, it might get soggy. I'm never sure weather to leave a gap upto the grate and Silicon it up or but up right and Silicon.