Description
The Pentair 154003Z is the OEM replacement 3-inch flange for the Triton C-3 fiberglass sand filter series, providing the structural and sealing interface between the filter tank and the valve assembly.
IMPORTANT: 2 FLANGES REQUIRED PER FILTER
Each Triton C-3 sand filter requires 2 flanges for a complete service. This listing is for one (1) flange. Order two to complete a full replacement.
The flange forms the critical pressure-bearing connection point at the filter tank opening, securing the multiport or slide valve assembly to the tank body and maintaining a leak-free seal under operating pressure. A cracked, warped, or deteriorated flange will result in water loss, pressure drop, and compromised filtration performance.
Specifications
| Pentair Part Number | 154003Z |
| Part Name | Flange, 3 in. |
| Connection Size | 3″ |
| Quantity Included | 1 (two required per filter see callout above) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Triton C-3 Sand Filter | TR100C-3 | 2 required per filter |
| Pentair | Triton C-3 Sand Filter | TR 100C-3 | 2 required per filter |
| Pentair | Triton C-3 Sand Filter | TR140C-3 | 2 required per filter |
| Pentair | Triton C-3 Sand Filter | TR 140C-3 | 2 required per filter |
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.
Pro Tip
Both flanges should be replaced together during a service visit. If one has cracked or warped from UV exposure, pressure cycling, or age, the second is likely at a similar stage of wear. Replacing both at the same time avoids a repeat repair and ensures even seating of the valve assembly across the tank opening. Before ordering, confirm the part number stamped or molded on your existing flange matches 154003Z.
