In plumbing, what does the "cold right" rule refer to?

The "cold right" rule in plumbing refers specifically to the standard that cold water pipes should be installed on the right side when viewed from a perspective of facing a fixture. This convention helps identify the hot and cold water supplies easily, reducing confusion during installations and repairs. Adhering to this rule improves the efficiency of plumbing systems and ensures that users can quickly and correctly identify which valve or pipe corresponds to the cold water supply.

This practice is particularly important in residential and commercial plumbing systems, where clarity in piping can prevent mistakes that might arise during maintenance or usage. The rule is a clear guideline that enhances safety and functionality within plumbing installations.