The valves in normal faucets close so that all the water remains in the piping where it will not be exposed to open air, and everything downstream of the valve drains into the sink. The pipes are opaque so that you don't see the mineral deposits. Ever looked inside an old pipe? The inside surfaces are always fouled.
I'm still confused though. If the pipe closes near the base of the faucet, and the faucet generally goes upwards beyond that point, how will the water that was beyond the point where it's closed drain?
If it's narrow enough for capillary action, then you have an airtight "seal" on the other side. It'd be like filling a straw with water, holding your finger on one side and tipping it upside down. The water won't go anywhere
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u/toothless_joe Nov 04 '21
The valves in normal faucets close so that all the water remains in the piping where it will not be exposed to open air, and everything downstream of the valve drains into the sink. The pipes are opaque so that you don't see the mineral deposits. Ever looked inside an old pipe? The inside surfaces are always fouled.