Whether the faucet in the clean area needs to be marked with pure water, tap water, etc.

In principle, you need it! ! There are no hard and fast rules, but it's better to standardize! Not on the faucet, but on the pipeline for color recognition! It is best to mark all media pipelines: compressed air, vacuum, steam, purified water, drinking water (tap water you mentioned, drinking water in Pharmacopoeia), water for injection, etc.