Compatibility and fit The Pressure Balancing Cartridge replaces RK7300-CART-3P and is a perfect fit for Z-7300 in Zurn Temp-Gard III Faucets and shower valves. Key benefits - Precise 40 mm diameter: Ensures the correct fit for your tub or shower faucet and is compatible with a wide range of shower and bathtub cartridges. - Reliable performance: As a pressure balancing cartridge, it is designed to maintain balanced operation in compatible systems. - Durable construction: Built from a blend of high-quality materials including ABS and copper for long-lasting use. - Easy installation: Designed for a straightforward replacement that can be completed in minutes using the included instructions. - Compatibility verification: Please verify compatibility with your specific model before purchasing. Product dimensions are hand-measured and may vary slightly. Construction - Pressure balance valve core constructed with durable ABS and copper materials for reliability and longevity. Installation - Simple replacement process; follow the included instructions to replace your existing valve core with ease. Compatibility note - Please verify compatibility with your specific model before purchasing. Product dimensions are measured by hand and may vary slightly. Use scenarios - Scenario 1: Replacing a worn RK7300-CART-3P in a Zurn Temp-Gard III faucet to restore proper valve response and reliable performance. - Scenario 2: Installing in a compatible 40 mm cartridge shower or tub faucet during a bathroom remodel to ensure correct fit and continued valve operation. - Scenario 3: Routine maintenance of a compatible shower system to replace aging internal components and help maintain consistent performance over time.