The Krowne 21-330L Cold Heavy Duty Repair Kit is designed to keep your Royal Series faucets and pre-rinse units running smoothly with minimal downtime. Featuring a built-in check valve, this kit prevents backflow while maintaining a consistent water flow—critical for commercial kitchen efficiency. The blue cold indicator makes it easy to identify temperature settings, ensuring your team operates with precision. Compatible with hard water conditions, the compression cartridge accommodates high-pressure flow, reducing wear and maintenance needs. Whether you're maintaining a high-volume restaurant or a bustling commercial kitchen, this repair kit provides a reliable, low-lead compliant solution that meets industry standards without sacrificing durability.