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.
Still not sure? Call (818) 818-6559 and we'll find it for you.
O-136 | Aladdin Pentair Ultra Flo Lid O-Ring | 39300300
Fits these models
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Goes with this part
CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Aladdin O-136 Pentair Ultra Flo Lid O-Ring is a precision-molded replacement for Pentair part 39300300, designed to create a reliable, watertight seal on Ultra Flo pump lids. Its durable, chemical-resistant elastomer maintains flexibility under pressure, preventing air leaks that can cause loss of prime or reduced flow. Sized to match the original Pentair dimensions, the O-136 seats cleanly in the lid groove for quick installation and secure sealing performance through regular pump operation.
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Exact Fit Replacement: Matches Pentair 39300300 for Ultra Flo pump lids, ensuring proper sealing and consistent performance.
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Prevents Air Leaks: Creates a tight, uniform seal that helps maintain pump prime and stable suction.
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Durable Elastomer Build: Chemical-resistant material withstands chlorine, heat, and daily pump cycles without deforming.
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Easy Groove Seating: Precision molding fits cleanly into the lid channel for fast, hassle-free replacement.
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Supports Optimal Flow: Helps eliminate suction-side issues that can reduce water movement and system efficiency.
- Pentair Ultra-Flo Pumps