Pentair Adapter, 8-1/2 in. Buttress Thread | Tagelus Sand Filter / PacFab Multiport Valves | 154521
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- Backordered: contact us for ETA
- SKU:
- 154521
-
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About This Item
The Pentair 154521 is the OEM replacement 8-1/2 in. buttress thread flange adapter for Tagelus sand filters and compatible PacFab multiport valves, providing the threaded interface between the filter tank and valve assembly.
The buttress thread adapter seats into the filter tank's flange opening and creates the threaded connection point that locks the multiport valve securely in place. A worn, cracked, or stripped adapter allows the valve to shift under pressure, compromising port sealing and filter performance. This adapter is designed specifically for Tagelus filter styles 11A and 11B — confirm your filter's style designation before ordering.
Specifications
| Pentair Part Number | 154521 |
| Part Name | Adapter, 8-1/2 in. Buttress Thread |
| Thread Type | Buttress thread flange |
| Size | 8-1/2 in. |
| Compatible Valve Connection | 2 in. |
| Quantity Included | Each (1) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Tagelus Fiberglass Sand Filter | TA60 | Fits Tagelus styles 11A and 11B only. Confirm style designation on your filter before ordering. |
| Pentair (formerly PacFab) | Sand Filter Valve 2 in. — PacFab Multiport Valves | 261055 | Flange buttress thread adapter, 2 in. Verify fitment before ordering. |
| Pentair (formerly PacFab) | D.E. Filter Valve 2 in. — PacFab Multiport Valves | 261152 | Flange buttress thread adapter, 2 in. Verify fitment before ordering. |
| Pentair (formerly PacFab) | Top Mount Multiport Valve — PacFab Multiport Valves | 261185 | Flange buttress thread adapter, 2 in. 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.
Pro Tip
Buttress thread adapters on Tagelus filters are style-specific — the 11A and 11B configurations are not interchangeable with other Tagelus style designations. Locate the style identifier on your filter tank (typically molded into the tank body or noted on the data label) and confirm it matches 11A or 11B before ordering. When replacing the adapter, inspect the multiport valve's mating flange for wear or deformation at the same time — a damaged valve flange will prevent the new adapter from sealing correctly regardless of thread condition.
