Shasta Pool Supply offers competitive pricing and fast shipping on Pentair maintenance components. This Pentair O-ring creates a tight seal for Pentair chemical feeders.
Pentair Rainbow 3" Cap O-Ring
Moreover, this Pentair replacement O-ring ensures durable performance under frequent chemical exposure. Furthermore, it resists wear, swelling, and deformation, thanks to quality OEM materials.

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Key Features
- Ensures complete watertight seal for Pentair Rainbow chemical feeders.
- Built for consistent sealing under pressurized chlorinator applications.
- Resists harsh chemical degradation ensuring long-lasting sealing stability.
- Provides precise fit replacement reducing downtime during service operations.
Technical Specifications
- Inner diameter: 0.25 ft
- Outer diameter: 0.26 ft
- Cross-section: 0.01 ft
- Seal depth: 0.005 ft
Specs
- Part Number: R172009Z
- Manufacturer: Pentair
Go with the name brand!
Pentair delivers lasting performance through dependable craftsmanship and proven quality. Pentair products are specially crafted to maintain balanced water conditions. Pentair design ensures intuitive, simple operation for everyday pool care. Moreover, Pentair builds their product with durable materials that resist fading under sunlight and wear from regular use. Furthermore, the company backs its products with consistent reliability trusted by pool owners and professionals alike.
How do Pentair OEM pool products compare to Non-OEM Pentair pool products?
Pentair OEM pool products meet exact Pentair specifications. As a result, they provide reliable fit and consistent performance. Additionally, materials and quality control meet strict Pentair standards. They offer dependable operation and lasting system integrity.
Non-OEM products cost less. However, material quality and manufacturing precision vary. Compatibility with Pentair systems is not guaranteed. Lifespan and performance may be reduced. Overall, OEM components deliver quality, while non-OEM products, deliver uncertainty.
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What our customers are saying
Very friendly and knowledgeable staff! Answered all of my questions and provided some information I wasn't aware of which was very helpful.
Very friendly and knowledgeable staff! Answered all of my questions and provided some information I wasn't aware of which was very helpful.
Wade L
I picked up my order at the headquarters in Phoenix. Courteous staff.
I picked up my order at the headquarters in Phoenix. Courteous staff.
William J
Our pool water is very clear. I wasn't really expecting this from the Shasta Pure unit... I feel like our pool is more clear looking, its kinds like swimming in drinking water...
Our pool water is very clear. I wasn't really expecting this from the Shasta Pure unit... I feel like our pool is more clear looking, its kinds like swimming in drinking water...
Erin A.
FAQ
Our expert staff answers customer's most asked questions.
Is installation simple?
Pentair makes it easy to install their replacement equipment, with numerous guides and videos available online.
Is this an OEM part?
Yes this part is original, from the manufacturer, and contains a manufacturer part number.
What are the ideal chemical ranges for my pool?
Achieving a balanced pool involves maintaining a pH range of 7.2–7.8, total alkalinity between 80–120 ppm, calcium hardness at 180–220 ppm, and cyanuric acid (stabilizer) within 30–50 ppm. Chlorine levels should consistently fall within the 1–3 ppm range, by may need to be increased as CYA levels go above 60 PPM.
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