The Waterway 505-3010 Clearwater valve split nut is designed for compatible pre-2001 models. A split nut like this is useful because it helps secure and connect valve-related components in assemblies that require this earlier style of hardware.Older model service often depends on version-specific parts, and using the correct split nut can help avoid fit issues during reassembly. This Waterway part is a practical replacement when the original pre-2001 nut has cracked, worn out, or gone missing.For compatible pre-2001 Clearwater valve repairs, this Waterway split nut is a practical replacement when the original retaining nut needs to be renewed. Waterway Clearwater valve split nut Designed for pre-2001 models Helps secure compatible valve-related components Useful for repair and rebuild work Supports version-correct restoration