Hayward Locknut Fitting Gray (SP1023DGR) pooltool and this Darlly cartridge is

and this Darlly cartridge is designed for compatible applications referencing FC-0168 and 4CH-926

Because this version is supplied without the overlay

When the cartridge media becomes restricted or worn

Using the correct Pentair gasket can help restore the condition of the assembly and support a more careful rebuild

Hayward Locknut Fitting Gray (SP1023DGR) pooltool and this Darlly cartridge isRefresh the return side connection with this gray Hayward locknut fitting, a practical replacement part for inlet and outlet fittings that need a secure, finished hold. It is designed for service work where a worn, cracked, or missing locknut can compromise the fit of the wall fitting or return assembly. Use this part when restoring a Hayward pool fitting, tightening an existing installation, or completing a repair where dependable thread engagement