Plumbing and electrical installations are the two chief factors to keep in mind of mechanical systems while constructing or remodeling your bathrooms.
While you change the older pipes for the new ones, better pick up cast iron instead of rigid plastic pipelines. Life is better for the cast iron pipes than other plastic finishes.
Do not forget to stuff a rag in any open waste pipes to stop sewer gases. Hefty and big bathtubs may need doubling the joists underneath them. Doubling is especially needed when notching joists so drainpipes have proper flow.
Check with your local construction administrator to estimate the load the tub creates and the necessary support required for it.
Before you really go for electrical fittings of your bathrooms, understand clearly how the wiring should be done.
You will require running new lines from the repair panel to the bathroom, or attaching into existing circuits and it's ceaselessly easier, to do that right after the framing is done.
Use a scrap of drywall or tile to set the boxes out the thickness of the finished ceiling or wall.