VARIABLE DIAMETER | HPX2002-1443 Hayward Variable Diameter (Model HPX2002-1443) is a genuine replacement part designed for Hayward heat pump models, particularly the HP50HA2. This component is integral to the heat pump's plumbing system, facilitating connections between pipes or hoses of varying diameters. Functionality: Adaptability: The variable diameter fitting allows for the seamless connection of pipes or hoses of different sizes, ensuring a secure and leak-free joint within the heat pump's plumbing system. System Integration: By accommodating various pipe diameters, it aids in the efficient integration of the heat pump into existing pool or spa plumbing configurations. Compatibility: The HPX2002-1443 variable diameter fitting is compatible with the following Hayward heat pump model: HP50HA2 Verify compatibility with your specific heat pump model before installation.