Can the faucet in the bathroom sink connect the hot water from the water heater?

You can pick it up, you need to pay attention to the position below.

The connector is in front of the mixing valve of the water heater, that is, the hot water from the water heater can flow directly into the faucet of the sink.

When the connector is behind the mixing valve of the water heater, the faucet of the sink will turn on the maximum hot water when using hot water, but the water is not hot. This is because the mixing valve of the water heater is not adjusted to the maximum hot water volume, thus reducing the water temperature mixing.

Pay attention to the mixing valve under the sink to facilitate the adjustment of water temperature.