The Waterway Check Valve [2" SKT x 2" SKT Flapper] is a Waterway replacement fitting or valve component used in compatible pool, spa, and bath plumbing systems. This part is designed to support proper flow control, serviceability, or plumbing function within the matching Waterway assembly.Because Waterway valve and fitting parts can be highly specific, compare the part number, connection type, size, and original component before ordering. It is a practical solution for targeted repairs where a complete equipment replacement is not needed. Replacement Waterway plumbing or valve component Supports compatible pool, spa, and bath systems Useful for flow control, repair, or service maintenance Designed for specific Waterway assemblies and connection styles Part number 550-6800 helps identify the correct fit