Restaurant Corner Sinks. Every commercial foodservice business requires commercial sinks and faucets. Each corner sink must be paired with a commercial faucet designed to optimize the usability of the sink station. Corner sinks are vital for meeting health code requirements for proper dish cleaning and sanitation. These corner sinks have one to four compartments, with three-compartment sinks being the most common for washing, and sanitizing dishes. Be sure to know what type of is best for you.