Have exposed existing DWV line and will be extending 3" toilet pipe about 4' to new location. Will move shower drain about 3' to new location. Vent stays where it is. While the floor is broken out and the channel runs almost the full 10' length of the bathroom, are there any items you would bury for possible later use? I'm thinking a conduit for future underslab wiring that would terminate under the shower base and be led out through the framing behind the shower; a capped bidet drain for possible future hookup; underground PEX/copper for fresh water supply; etc.? Anybody have advice, please?