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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SW-26-033 | Swimables Pentair 2000/4000 Series Filter Clamp Knob | 076033
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CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Swimables SW-26-033 is an aftermarket replacement clamp knob engineered for Pentair / Purex SM & SMBW 2000 and 4000 series D.E. filters. It directly replaces the Pentair OEM knob 076033 (also 076033Z). This knob secures the tank clamp ring, ensuring the filter dome is held tightly against the base to maintain a proper seal. Made of robust molded material, it's designed to withstand repeated tightening, chemical exposure, and UV conditions. It’s a practical service part that helps maintain filter tank integrity and prevent leaks during operation.
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OEM Part Compatibility with 076033: Serves as a direct, drop-in replacement for Pentair’s original clamping knob (076033 / 076033Z) in SM / SMBW 2000 and 4000 series filters.
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Secures Clamping Band Effectively: Designed to reliably engage the filter clamping ring, holding the tank halves together to prevent leaks or failure under pressure.
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Durable Material Built for Pool Life: Constructed from rugged molded plastic engineered to resist pool chemicals, UV degradation, and torque stress over multiple service cycles.
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Essential for Maintaining Filter Integrity: This knob ensures the dome and lower tank remain tightly sealed—critical for safety and performance during filtration.
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Quick & Straightforward Replacement: Fits directly in place of the old knob with no modifications, reducing service time and simplifying filter maintenance tasks.
- Pentair Nautilus Plus Filters
- Pentair SM & SMBW 2000 Series Filters manufactured after 1998
- Pentair SM & SMBW 4000 Series Filters manufactured after 1998
This section explains the Swimables SW-26-033 clamp knob, an aftermarket replacement for Pentair OEM part 076033. Learn how it fits SM and SMBW filter models, how to troubleshoot sealing issues, and where to find it in store.
Installing the SW-26-033 Clamp Knob
The clamp knob secures the filter dome to the base. Make sure the clamp ring is seated properly before tightening the knob to avoid uneven pressure.
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Troubleshooting Seal and Leak Problems
Leaks often come from uneven clamping pressure or a worn o-ring. Replacing the knob with SW-26-033 ensures proper clamp tension for a secure seal.
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Buying the Clamp Knob In Store
Bring your old knob to compare against the SW-26-033. Local staff can confirm compatibility and ensure you leave with the right replacement part.