Hot water supply should be installed on which side of a fixture requiring hot water?

The installation of hot water supply lines on the left side of fixtures is standard practice in plumbing to ensure consistency and reduce the risk of confusion for users. This convention is widely adopted across various plumbing codes and practices, primarily to promote safety and accessibility. By placing the hot water supply on the left side, it aligns with the expectation of users when utilizing faucets or fixtures, as turning the handle or knob to the left typically supplies hot water.

This standardization is particularly important in residential and commercial plumbing, as it helps prevent accidents that could arise if someone were to mistakenly use hot water without realizing it was on the right side. Furthermore, adhering to this practice helps plumbing professionals in installation and maintenance tasks, as they can work with a common frame of reference, making the system easier to understand and manage for both installers and end-users.

While other options suggest different placements, they do not adhere to these established conventions, potentially leading to confusion and safety concerns.