Pentair 170145 Cartridge Pack | 300SQF System 3 Modular Inner and Outer
Pentair 170145 Cartridge Pack | 300SQF System 3 Modular Inner and Outer
Upgrade your pool filtration with Pentair 170145 cartridge pack. Shasta Pool Supply offers the lowest price and fastest shipping on replacements for the System 3 Modular filter. Specifically, this product provides the inner and outer replacement.
Pentair 170145 Cartridge Pack
The Cartridge Pack keeps your pool crystal clear. The Pentair 170145 replaces System3 S7M120 filters. Furthermore, this comprehensive pack includes both inner and outer replacement cartridges.

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Key Features
• Complete Set: Includes inner (25021-0200S) and outer (25022-0201S) cartridges
• High Capacity: 300 sq ft total filtration area (100 sq ft inner, 200 sq ft outer)
• Easy Maintenance: Modular design allows quick filter media changes
• Efficient Cleaning: Simply spray with a hose inside and out
• Balanced Flow: Integral design for optimal water circulation
• Durable Construction: Built to withstand pool chemicals and frequent use
Technical Specifications
- Application: StaRite/Pentair Bottom
- Inner Cartridge: 16-1/2" diameter, 18-1/2" length
- Outer Cartridge: 8-9/16" diameter, 25-1/4" length
- Media Type: 4oz
- Model: S7M120 System 3
Specs
- Part Number: 170145
- Manufacturer: Pentair
- Length: 19.25
- Width: 19.25
- Height: 30.5

Reduces Filter Maintenance
Balanced Flow Design
The Pentair 170145 delivers worry-free pool maintenance. Additionally, its balanced flow design and easy-to-clean structure provides long-term and reliable performance. Therefore, it reduces the frequency of filter maintenance.
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What our customers are saying
My heater arrived undamaged and was securely shipped on a crate. The product was exactly what I needed to remove the old unit and install the new unit. Thank you!
My heater arrived undamaged and was securely shipped on a crate. The product was exactly what I needed to remove the old unit and install the new unit. Thank you!
Samuel S.
At long last, I think I finally found the discontinued pool lite product for which I was searching. The customer service rep was quick to reply and clearly indicated the terms of the purchase and potential product return if the product was not suitable for my project. Although I am not sure the product will meet my needs, it looks quite similar to the one I am replacing and I am forever hopeful.
At long last, I think I finally found the discontinued pool lite product for which I was searching. The customer service rep was quick to reply and clearly indicated the terms of the purchase and potential product return if the product was not suitable for my project. Although I am not sure the product will meet my needs, it looks quite similar to the one I am replacing and I am forever hopeful.
Chris S.
Everything was great! Awesome prices also.
Everything was great! Awesome prices also.
John B.
FAQ
Our expert staff answers customer's most asked questions.
How frequently should I clean my filter cartridges?
The cleaning frequency is contingent on your filter's size. As a general guideline, initiate the cleaning process when the filter pressure exceeds the initial pressure by 10 psi. This ensures optimal filtration efficiency.
What is the recommended duration for running my pool equipment?
There isn't a specific timeframe, but it's essential to complete a full water turnover within a 24-hour period. Utilizing pool equipment during off-peak hours can be cost-effective.
What is better for my pool and my body: Salt Chlorinator or Chlorine Chemicals?
Opting for a salt chlorinator is a superior choice for both your pool and skin. In addition to cost savings on chemicals, it requires minimal maintenance with a 5-7 year replacement cycle on salt cells. Most salt cells have an operating life of 10,000 hours. Proper maintenance will help extend the life cycle of salt cells. Refer to your owner's manual for cleaning instructions and tips on cleaning Pentair salt cells and products that help keep all salt cells cleaner. Explore our recommended models, Gentle Chlor and IC-40, by following this link.
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