I am remodeling my condo in a older building in downtown Seattle and trying to bring my water heater up to code. Old discharge valve was not directed anywhere, and doing so is difficult because there is no way to route the discharge line outside the building. My only drains are downstairs in the kitchen, upstairs bathroom sink, and upstairs shower drain. The water heater is on the second floor adjacent wall to the shower. The shower is part of the remodeling project and will be a tile floor with a curb running the length of the bathroom. Crazy question - could I run a T&P discharge over and down to the corner of the shower (and possibly hide it with a tiled shroud over the outlet)?