Stumped on pump bulkhead union o-ring

[KDpoolguy]

Hayward Tristar VS, still using same bulkhead union from Sta-Rite pump. Hoping to replace this entire piece due to leak.
Leak has revealed itself and likely it’s been leaking for a while.
The image hopefully is clear that there’s a space for a rubber o-ring on the pump housing itself, but union also had oring. Anyone aware of a proper o-ring to maybe a flat bulkhead? Should I find a Sch40 from HD or CPVC online? I mistakenly purchased bulkheads (Oring gasket goes inside instead of flush). for the Pentair cart filter. I know this is gonna leak again.

 

[KDpoolguy]

I think I found it, some was in the kit that the pump arrived with, glad I keep this stuff. I never put that oring ‘Gasket’ in the first place.

Hayward SPX3200UG Union Gasket Replacement for Select Hayward Pump and Filter

And

Hayward SPX3200UNKIT Union Connector Replacement Kit for Select Hayward Pump and Heater

 

[kadavis]

Hayward | TriStar Full Rated Pump | Replacement Parts Diagram