Description
The Pentair Flange Assembly Kit (357261) is the OEM replacement 3-inch flange assembly for the Aurora 3800 Series end suction pump. This kit includes the thermoplastic PVC socket-style flange, a pre-cut gasket, and stainless steel mounting hardware everything required for a complete flange replacement in a single package.
IMPORTANT: THIS LISTING IS FOR A KIT ONE COMPLETE ASSEMBLY
Part 357261 is sold as a single kit containing the 3-inch PVC flange, gasket, and stainless steel hardware. Confirm the quantity you need before ordering one kit services one flange connection point.
The flange creates a bolted, gasketed connection between the pump and the piping or associated plumbing fitting. A failed or cracked flange or a degraded gasket results in leakage at the pump suction or discharge. This kit replaces all sealing and fastening components at that joint in a single service action.
Specifications
| Pentair Part Number | 357261 |
| Part Name | Flange 3 in. with Gasket and Stainless Steel Hardware |
| Flange Size | 3 inches |
| Connection Style | Socket (PVC) |
| Material Flange Body | Thermoplastic PVC |
| Hardware Material | Stainless Steel |
| Kit Contents | Flange, gasket, stainless steel hardware |
| Quantity | 1 kit (each) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Aurora 3800 Series | 3801 | Aurora Pump Accessory Flange Assembly Kit; thermoplastic PVC socket style. Verify fitment before ordering. |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment’s manual or on the original part itself before ordering.
Poolaroo Pro Tip
When replacing the flange, inspect the mating pipe socket and the surrounding pipe section for stress cracks or UV degradation before installing the new flange. A socket-style PVC flange relies on a clean, undamaged pipe end for a proper solvent-weld bond. If the pipe end shows crazing or cracking, cut back to clean material before proceeding. Always replace the gasket included in this kit at every flange service interval, even if the old gasket appears intact.
