No, that is your execution - so you would slot crosswise? Completely against every rule. You would slot into concrete? Completely against the rule...
But thanks, now everyone could read what kind of person you are.
By the way, it is not my solution - I would not presume to dictate such things to my architect and plumber. And that's basically how it's done in almost every construction here - possibly except for timber frame construction, I don't know about that.