Paul,Yersmay? In Oz we must have a floor waste adjacent to a urinal. If the floor waste cannot be charged with a waste fixture i.e a basin, then the floor waste must be charged by another means – say a hose tap with a shroud to stop people drinking from it, situated near the floor waste, or a charge pipe from a flushing device such as a cistern flush pipe.
The charge pipe simply discharges over the water seal of the floor waste so as to keep the water seal intact.
However the pipe you are talking about may also be a dlivery pipe from a sanitizer “to keep the loo smelling nice”
Was in LA once. Did’nt like it! When we travelled out to Barstow the people were human again.
America is a great place, If I was’nt Australian I would probably like to be an American, But never a New Yawker like some of the blokes on the alternative Forum