Pentair 3-Port Top Mount Diverter Valve [1" Slip] [Scallop] [Grey] (9881WW) is a plumbing fitting or valve component from Pentair Pool Products for use in compatible pool, spa, bath, or equipment service applications. It is intended to replace a worn, missing, cracked, corroded, or outdated component while keeping the repair focused on the exact part needed. This item is listed in the Fittings & Valves: 2-3-4-5 Way Valves category, making it easier for service technicians, maintenance teams, and homeowners to locate it during a parts lookup or equipment rebuild. Part number 9881WW is included for easier cross-reference during ordering and maintenance.Because many pool and spa parts look similar but vary by size, connection, finish, voltage, layout, or model series, always compare Pentair 3-Port Top Mount Diverter Valve [1" Slip] [Scallop] [Grey] with the existing part before installation. Confirm the stamped part number when available, review the product photos, and check all measurements or configuration notes shown in the title. Choosing the correct replacement helps reduce return trips, prevents unnecessary equipment downtime, and supports supporting dependable water flow through the pool or spa plumbing system. For best results, installation should be completed by a qualified pool or spa professional whenever plumbing, electrical, gas, or safety-related systems are involved. Genuine listing details: Pentair 3-Port Top Mount Diverter Valve [1" Slip] [Scallop] [Grey] (9881WW) Manufacturer or brand: Pentair Pool Products Product category: Fittings & Valves: 2-3-4-5 Way Valves Best used for: supporting dependable water flow through the pool or spa plumbing system Before ordering: matching pipe size, thread/slip configuration, material, and valve style