Pentair Pool Impeller To Shafts Gasket (33455-8044) airbuttonparts Replacing the volute back is

Replacing the volute back is often the right step when the rest of the pump remains serviceable and the structural weakness is isolated to the rear housing support

and this Paramount version is a small style supplied in a quantity of four using the 005-627-0060-00 reference

O-ring with 31-1/2 inch ID and 5/16 inch cross-section

CMP wall fitting with nut

Pentair Pool Impeller To Shafts Gasket (33455-8044) airbuttonparts Replacing the volute back isThe Pentair 33455 8044 impeller to shaft gasket is designed for compatible pump repair applications where the sealing part at that internal connection needs replacement. A gasket like this is useful because it helps support the intended fit between related internal parts during pump service and reassembly. This type of replacement is often needed when the original gasket has been damaged, distorted, or worn beyond confidence during teardown.