Why are tank water closets (W/C) preferred over flushometer W/Cs for residences?

Tank water closets are preferred over flushometer water closets for residences primarily because they can operate effectively with a smaller size supply line. This is advantageous for residential plumbing systems, which often have limited space and may not accommodate the larger supply lines typically required by flushometer systems.

Tank water closets are designed to use gravitational force to flush waste, relying on the storage tank to provide water when flushed. This design allows them to function well with the standard water pressure found in most residential settings. As a result, they do not necessitate the robust water supply and larger piping that flushometer toilets require, making them a more feasible choice for everyday household plumbing.

Other considerations like installation costs, flushing speed, or drain size do not outweigh the practicality of the supply line size when fitting the common residential plumbing systems. Thus, understanding the operational requirements of tank water closets highlights why they are a preferred option in home settings.