Spoiler alert
I've looked at both walkthroughs here, and a few others online (none as good as yours) and no matter in what order I use/get things, there is no hot spot on the urinal when I have the hose. The key is already in the distributor and I've got the stocking and barrier tape on the pipe in the sewer. But I can't get the water to flush it down.
Do I need to uninstall the game and hopefully use some saved games? Or am I just stuck?