The Waterway 715-9890 plug is designed for compatible plumbing applications using a 3/4 inch spigot connection. This kind of plug is useful when a smaller rigid fitting opening must be closed off cleanly during service, installation, or system configuration.Small plugs are easy to underestimate, but the correct Waterway part helps the overall plumbing layout look more complete and behave more predictably. It is especially practical in tighter systems where a clean closure matters just as much as the main fittings.For compatible plumbing and fitting service, this Waterway spigot plug is a practical replacement when a 3/4 inch closure is required. Waterway 3/4 inch spigot plug Designed for compatible rigid plumbing applications Helps close unused or open fitting connections Useful for service, installation, and system configuration Supports cleaner and more complete plumbing layout