Unicel C-7465 | 65 sq ft Sundance 6540-480 Spa Filter Brand_Heat & Glo There is a closely related

There is a closely related cartridge with the same 4-5/8" diameter

and 2-1/8" end openings — is identical

Caldera VersaSsage Jet 77593 used on select Caldera models

The monthly cadence keeps that from happening

Unicel C-7465 | 65 sq ft Sundance 6540-480 Spa Filter Brand_Heat & Glo There is a closely relatedThe Unicel C 7465 is a 65 square foot replacement cartridge for Sundance spas fitted with a 1 1 2" system, replacing OEM part number 6540 480. It carries 164 pleats across a wide 7 1 2" body, with a closed castle top a sealed end cap with a crenellated, notched rim and an open 2 1 16" bottom that seats over the suction fitting. That 2 1 16" bottom opening is the single most important number on this page, because it is the only thing separating this