Pentair Union Diamond Seal | Clean & Clear RP, Posi-Clear RP & Separation Tank | 178746Z
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- Backordered: contact us for ETA
- SKU:
- 178746Z
-
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About This Item
The Pentair Union Diamond Seal (178746Z) is the OEM replacement seal for the union connections on Pentair Clean & Clear RP, Posi-Clear RP, System:2 Modular Media Filter, and Separation Tank filtration systems.
This seal maintains a watertight connection at the union joint on the filter body. A worn or damaged diamond seal allows water to weep or leak from the union, compromising system pressure and wasting water. Replacing this seal with the correct OEM part restores a secure, leak-free union connection.
Specifications
| Pentair Part Number | 178746Z |
| Part Name | Union Diamond Seal |
| Part Category | Seals |
| Quantity Included | 1 (Each) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | Clean & Clear RP | CLEAN & CLEAR RP | — |
| Pentair | Posi-Clear RP | PXC100 | Fits all Posi-Clear RP filter models |
| Pentair | Posi-Clear RP | PXC150 | Fits all Posi-Clear RP filter models |
| Pentair | Posi-Clear RP | PXC200 | Fits all Posi-Clear RP filter models |
| Pentair | System:2 Modular Media Filter | PLM100 | — |
| Pentair | System:2 Modular Media Filter | PLM150 | — |
| Pentair | Separation Tank | SEP 48 | Fits Separation Tank SEP 48/72/96/144 |
| Pentair | Separation Tank | SEP 72 | Fits Separation Tank SEP 48/72/96/144 |
| Pentair | Separation Tank | SEP 96 | Fits Separation Tank SEP 48/72/96/144 |
| Pentair | Separation Tank | SEP 144 | Fits Separation Tank SEP 48/72/96/144 |
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
The diamond seal profile on this part is designed specifically for Pentair's union joint geometry — do not substitute a generic flat gasket. When replacing this seal, clean the union face and seat thoroughly before seating the new part. Inspect the union threads and collar for cracking or distortion at the same time; a damaged union body will prevent the new seal from holding pressure regardless of seal condition.
