Waterway Threaded Sleeve For Split Nut Sand Filter [R3] (505-1960) filters A volute like this is

A volute like this is useful because it forms the primary water-directing housing around the impeller

Extended cartridge filter designs can be especially practical where additional filtration area is desirable within the same equipment style

Replacement is often necessary when the original switch is damaged

This silent-style control helps regulate incoming air at the spa surface while offering a more refined operating feel for users who want adjustable airflow without sacrificing a polished presentation

The Waterway 775-0502 daughter board 2 is designed for compatible NEO 2100 spa control system applications

Waterway Threaded Sleeve For Split Nut Sand Filter [R3] (505-1960) filters A volute like this isThe Waterway 505 1960 threaded sleeve is designed for compatible split nut sand filter applications and is identified as the R3 version. A part like this is useful because it helps restore the threaded connection structure used by the split nut assembly, supporting cleaner filter reassembly during service or rebuild work. Threaded sleeves can be important in sand filter maintenance because they help preserve the fit and engagement of related hardware.