As low as 2" and as high as 8 feet depending on what fixture is being supplied
Your trap arm should be coming out from the wall at a height from the floor of 16-18", the cleanout just below the tee on the plumbing stack. The water lines should be at around 10-12 inches above the floor
To supply water to the 3rd floor without pump, you have to make the tank stand above the roof so water can run freely to all the floors without hitch
supply potable water
In a rough-in diagram, the proper placement and configuration of shower plumbing typically involves positioning the hot and cold water supply lines above the shower valve, with the drain pipe located below the shower floor. The shower head and controls should be placed at a comfortable height for the user, with the necessary connections for the water supply and drainage properly aligned.
To connect a water supply line adapter to your existing plumbing system, first turn off the water supply. Then, use a wrench to disconnect the existing water supply line. Next, attach the adapter to the plumbing system using the appropriate fittings and connectors. Finally, turn the water supply back on and check for any leaks.
From the pipes and Plumbing coming into your home. :)
To properly install bathroom sink plumbing through the floor, you will need to first measure and cut the necessary pipes to fit the layout. Next, connect the pipes to the sink drain and water supply lines. Secure the pipes in place using appropriate fittings and supports. Finally, test the plumbing for leaks before sealing the floor around the pipes.
Vent - Cold Water Supply - Drainage - hot water supply /return
General Plumbing Supply. Check with Rheem, all makers have specific dealers
The function of a water supply valve is to control the flow of water into a plumbing system. It allows you to turn the water on and off as needed. The valve helps regulate water pressure and prevent leaks, contributing to the overall efficiency and safety of the plumbing system.
plumbing
As long as there is an Air gap ABOVE the water supply your ok If not you need to install vacuum breakers to prevent the potable water supply from being contaminated