Pentair Volute with Drain Plug | OptiFlo Above-Ground Pool & Spa Pump | 357213Z

OEM Replacement Volute for the Pentair OptiFlo Pump

The Pentair Volute with Drain Plug (357213Z) is the OEM replacement volute housing for the OptiFlo® Above-Ground Pool and Spa Pump. If your pump housing is cracked, leaking at the volute seam, or damaged at the drain plug port, this is the direct-fit replacement that restores the pump to factory condition.

What It Does

The volute is the wet-end housing that surrounds the impeller and directs water flow from the pump inlet through to the discharge port. It forms the primary pressure boundary of the pump's wet end. The integrated drain plug allows the pump to be fully drained for winterization or service without disassembling the entire pump body. A cracked or compromised volute will result in water loss at the pump and loss of prime — replacing it with the OEM part ensures correct hydraulic geometry and a leak-free seal against the pump's diffuser and seal plate.

Specifications

Pro Tip

Before ordering, match the part number molded or stamped on your existing volute to confirm 357213Z is the correct replacement for your specific OptiFlo model variant. While the pump wet end is open for this service, inspect the impeller and shaft seal — replacing worn components together avoids a repeat disassembly. Verify your drain plug O-ring condition at the same time and replace it if it shows any flattening or cracking.