Is the 1.0 gpm flow rate enough for a bathroom sink?

It meets the federal maximum for bathroom faucets and is fine for handwashing and tooth brushing. Some people find the stream softer than a 1.5 gpm faucet, especially at low pressure.

Does it come with a drain?

Yes. A metal pop-up drain with lift rod and tailpiece is included, so no separate drain assembly is needed.

Will it fit a standard three-hole sink?

It is a single-handle faucet, so check the spec sheet for the deck thickness and hole requirements. It is designed for a single-hole or centerset-style installation rather than a widespread three-hole setup.

How does it compare with other Kohler single-handle faucets?

The Parallel shares Kohler's ceramic disc valve and metal drain with models like the Hint and Katara but stands out for its square-with-circle styling and lower flow rate. Pick it if the look matters more than a stronger stream.

How do I clean the aerator or replace the valve?

Kohler publishes a parts breakdown and exploded diagram for this model, and the ceramic cartridge is serviceable. Shut off the water supply before removing the handle.