Waterway Drain Fill Valve [3/4" Lo-Profile] is a replacement valve component from Waterway Plastics for compatible pool, spa, and bath plumbing systems. It is designed to help manage water flow, seal integrity, or valve operation in matching Waterway assemblies.This part is a smart option for service work where a worn valve part is causing leaks, difficult adjustment, or unreliable flow control. Before ordering, compare the part number, connection size, shape, and system compatibility with the component being replaced. Genuine-style replacement part for compatible Waterway systems Helps restore proper fit, flow, sealing, or service function Useful for pool, spa, bath, and equipment repair applications Part number 600-9101 helps confirm the correct replacement Recommended for matching by model, dimensions, and existing part design