Find your parts diagram
Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
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Pentair 178575 Bottom Bulkhead | Quad DE Filters
Fits these models (3)
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Pentair 178575 Bottom Bulkhead is a genuine OEM replacement part made for Quad DE, Clean & Clear Plus, and FNS Plus pool and spa filters. It provides a secure connection at the filter base, helping prevent leaks while maintaining proper flow and pressure. Designed to Pentair’s specifications, the bulkhead ensures that water is directed through the filtration media effectively, protecting system performance. Its durable construction stands up to the challenges of continuous pool use, offering reliability in demanding service conditions. Replacing this component restores proper filter function and supports cleaner, clearer water.
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OEM Replacement: The Pentair 178575 bulkhead is manufactured to original standards, giving pool owners confidence in its precise fit and dependable performance.
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Multiple Filter Fit: Compatible with Quad DE, FNS Plus, and Clean & Clear Plus models, this part works across different Pentair filter series for flexible use.
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Strong Seal: Designed to prevent leakage at the bottom of the filter housing, the bulkhead keeps water contained and ensures steady system operation.
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Maintains Filtration Efficiency: By supporting proper pressure and water flow, this part helps filters achieve optimal clarity and reliable circulation over time.
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Durable OEM Build: Made from resilient, long-lasting materials, the 178575 bulkhead withstands poolside conditions and frequent use without compromising integrity.
- (1) Pentair 178575 Bottom Bulkhead
- Pentair Quad DE Filters
- Pentair Clean and Clear Plus Filters
- Pentair FNS Plus Filter
