Pentair StaRite Filter Union Adapter, U11198P
No. 15 Image U11-198P Sta Rite Union Adapter fits many Sta-Rite pool filters, as the external fitting that connects to the internal pipe elbow bulkhead and the external valve (slide or multiport). Measures 3.25in OD, and is MPT/FPT, or male threads on one side, attaching to valve union nut and female threads on the other side, attaching to bulkhead. Fits StaRite DEP/DES D.E. filters, and HRP and Cristal-Flo sand filters.