Restore peak performance to your PROFLO PF4001 Tub and Shower Valve with this robust replacement cartridge, also known as the acf4001ucrt cartridge. Expertly crafted from durable metal with a ceramic cartridge type, this essential component ensures reliable water flow and precise temperature control for your bathing experience. Measuring 5.6 inches in height and 1.3 inches in both width and depth, this cartridge is specifically engineered for seamless compatibility with the PF4001 Tub and Shower Valve. Its premium ceramic construction minimizes wear and tear, offering smooth operation and helping to prevent leaks, while the metal material provides long-lasting durability. This replacement part is crucial for maintaining the functionality of your existing PROFLO system. This replacement cartridge ensures your tub and shower valve operates efficiently, delivering consistent water pressure and temperature. Designed for straightforward mounting and installation (installation required), it features durable metal construction for longevity. Please note that this cartridge does not include handles, a flush valve, or a mounting/installation kit. It provides the quality and value you expect for maintaining your plumbing system, aligning with PROFLO's commitment to reliable products.