This cord O-ring for tank is designed to use with:
- Sta-Rite PLM pool/spa cartridge above ground filter system
- Also compatible with Sta-Rite PLD pool/spa D.E. aboveground filter system
- Fits with Sta-Rite System 2 Modular Media PLM Series pool/spa cartridge filters model PLM100, PLM125, PLM150, PLM175, PLM200, PLM300

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Mushroom Propane Patio Heater SIH01-HB | SI 87" Tall Hammered Bronze w/ Pilot
Regular price $99.99 USDRegular priceUnit price / per$199.99 USDSale price $99.99 USDSale
What our customers are saying
Quick delivery of my ordered products. Thank you
Quick delivery of my ordered products. Thank you
Patricia S
After researching our pool filter options, we decided to buy the Aquastar PLF35000 that our local pool guy recommended. I reached out before ordering to confirm pricing and availability. Clinton responded promptly (on a weekend) and followed up with sending an invoice that made ordering easier with just one click. Filter arrived as scheduled. From inquiry to install, all was complete within a week! Thanks for the help Clinton.
After researching our pool filter options, we decided to buy the Aquastar PLF35000 that our local pool guy recommended. I reached out before ordering to confirm pricing and availability. Clinton responded promptly (on a weekend) and followed up with sending an invoice that made ordering easier with just one click. Filter arrived as scheduled. From inquiry to install, all was complete within a week! Thanks for the help Clinton.
Jennifer K.
Quick quote, good price and fast delivery
Quick quote, good price and fast delivery
Kent V.
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 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.
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.
Learning Center
Blog posts
The latest news and guides making buying and maintaining pool equipment easier.
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How to Backwash a Pool: Simple Tricks Pool Pros...
Proper pool backwashing takes just a few minutes and saves hours of frustration. Many pool owners face cloudy water and poor filter performance because they skip this significant maintenance step....
How to Backwash a Pool: Simple Tricks Pool Pros...
Proper pool backwashing takes just a few minutes and saves hours of frustration. Many pool owners face cloudy water and poor filter performance because they skip this significant maintenance step....
Learn More -
Pentair vs Jandy vs Hayward: Best Pool Filter S...
Swimming pool filter systems have seen three dominant players in the market for decades: Pentair, Jandy, and Hayward. Pentair leads the pack with a 35% market share, and Jandy follows...
Pentair vs Jandy vs Hayward: Best Pool Filter S...
Swimming pool filter systems have seen three dominant players in the market for decades: Pentair, Jandy, and Hayward. Pentair leads the pack with a 35% market share, and Jandy follows...
Learn More -
Warning Signs You Need a New Pool Filter Cartridge
Pool filter cartridges typically last one to three years. However, many pool owners aren't sure about the right time to replace their cartridges. Some people keep them for 3-5 years...
Warning Signs You Need a New Pool Filter Cartridge
Pool filter cartridges typically last one to three years. However, many pool owners aren't sure about the right time to replace their cartridges. Some people keep them for 3-5 years...
Learn More