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97% will sink below the water
just a sink Below surface (grade) sink
What is the minimum distance between the bottom of a sink and the trap attachment for a bathroom sink
You haven't provided enought detail. The answer is maybe. If the sink is indoors and the pipes are in a well insulated portion of the building structure, then probably not. If the pipes are in an exterior wall or in an uninsulated space and the outside air temps go below freezing in the winter, then it's probably a good idea. They'll also be quieter if you wrap them.
The present participle of sink is sinking-------------------------------------------------------------------------------See Related questions below.
to sink below the surface of water
You don't have to replace the sink when you replace your cabinets. If the sink works, does not leak, and suits your aesthetic, there is no need to replace it.
Undermount is actually a style of sink. This style of sink is mounted below the edge of the counter so there is no lip around the sink. It is important that stainless steel undermount sinks be properly installed using a two-part epoxy adhesive and silicone caulking as a sealant.
Additional shut off valve, below sink or in basement. Incomplete pipes not tied into bathroom sink line.
It didn't.
No and yes. Amendment (not from a professional plumber!): If you were simply running the sink drain into the shower drain and if there was not a reduction in pipe size, I would think you would be able to do that. I think the reason you need a trap for the sink has to do with code that requires a trap be no more than 24" from the basin to the trap arm. That being said, the pedestal sink in my house does not have a trap until after it drains below the floor.
No. Two 45 degree ell pipes with a space piece to make up the 90 degree ell you need.