I've recently had the toilet pan upgraded in my home by a plumber. I'm curious about the shape of the bottom inside of the pan where the water rests. To all intents and purposes, it resembles the layout of a swimming pool with half the distance front to back being very shallow with only an inch or so of water, while the second half is much deeper, just like a conventional toilet pan.
Has anyone any idea why they make toilet pans with this "shelf" in place? I suppose it could be useful if you drop your mobile phone down there accidentally as there's a chance it won't be completely submerged!
That sounds like the pans they use on some parts of the continent - it's very handy if you need to take a stool sample, the sample sits waiting on the shelf for you... (bleah, but true)
It is to save water, that design uses less volume of water for a flush but still shifts all the 'contents'. Belive it or not there is a 'flush test' specified by British Standards which involves flushing away 4 ''British standard turds'' (that is not the actual names used )
Mosiac I used to work as a materials test engineer , we tested everything from 'hard hats' to safety boots. I also maintained the library of test manuals and advised people on the correct test methods for anything they had to test.
Do you know the make? This sounds like a typically German toilet pan. The German race seem to have an obsession with "going through the motions" as it were. Apparently many health issues can be explored by poking about and carefully examining that which is poised on the helpfully designed shelf that you have described. More details, should you require them, available on request.