system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does tap water remain safe to drink after traveling miles and miles in old pipes underground?
gpt
Water in pipes is kept at high pressure so if there's ever a leak water only flows out of the pipe and not into it. Furthermore, the water is cleaned properly before it is pumped into the pipes. That way, only clean water goes through the pipes.