SKU: 53527888330

OptiPure CTOS-Q, 300-05835, 15 inch Qwik-Twist Carbon Water Filter

Sale price$155.70 Regular price$173.00
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Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

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Description

OptiPure CTOS-Q, 300-05835, 15 inch Qwik-Twist Carbon Water FilterThe CTOS Q is a 15 Quick Twist cartridge for use in OptiPure QTI series systems to reduce sediment down to 0. 5 microns and reduce chlorine, taste & odor at a flow rate of 2. 25 gpm for 22,500 gallons. The cartridge includes IsoNet, OptiPures patented scale inhibiting technology, which delivers consistent protection against the precipitation and accumulation of scale and provides a protective barrier to help guard against corrosion. The system is

The CTOS-Q is a 15” Quick-Twist cartridge for use in OptiPure QTI series systems to reduce sediment down to 0.5 microns and reduce chlorine, taste & odor at a flow rate of 2.25 gpm for 22,500 gallons. The cartridge includes IsoNet®, OptiPure’s patented scale-inhibiting technology, which delivers consistent protection against the precipitation and accumulation of scale and provides a protective barrier to help guard against corrosion.

The system is tested and certified by NSF International against NSF/ ANSI Standard 42 for the reduction of:

Standard 42: Aesthetic Effects, Chlorine Reduction Taste and Odor Reduction, Nominal Particulate Reduction, Class I

Specifications:

  • Brand: Pentair Everpure®
  • Part Number: 300-05835
  • Application: Hot Beverage, Ice Machines, Steam, Combi-Ovens
  • Replacement Interval: AS NEEDED / 6 MONTHS
  • Compatibility: 

NOTE: Please verify your model number, connection type, and system compatibility before ordering.

Why choose this product?

  • Designed for dependable performance
  • Easy replacement or installation
  • Commercial-grade quality
  • IsoNet® - Pentair’s patented scale-inhibiting technology protects equipment against scale and corrosion†
  • Reduces maintenance frequency, cost, and extends equipment life
  • Gradient-density depth filtration reduces dirt, rust, and other debris as small as 2 microns to assure clean, clear water and protect solenoids, valves and other fittings against wear and plugging†
  • Activated carbon filtration makes water taste great and protects equipment against corrosive chlorine†
  • High-capacity cartridge extends filter system life, reducing maintenance frequency
  • Improves equipment operating efficiency by reducing scale and corrosion
  • 1/4 turn QT Qwik-Twist cartridge makes changing the filter quick, easy and sanitary

*Not performance tested or certified by NSF †As tested by Pentair

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 53527888330

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4.2 ★★★★★
Based on 6 reviews
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C
Verified Purchase
Caroline Rose
Alexandria, US
★★★★★ 5
Great scale, an excellent buy
Color: Black&Silver
Is it possible to fall in love with a scale? I unboxed this one and, without reading any directions, put an empty 1/4 cup on it, turned the scale on, filled the 1/4 cup with coffee beans till I had the desired 17 or so grams, and turned the scale off. Easy-peasy! It’s small but sensitive, able to tell when a single bean has been added or removed. I almost didn’t get it because of the charging issue, but at least it tells you what the current charge is, and the way I use it I believe it will last several months without recharging. I’m so glad I bought this scale!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
R
Verified Purchase
R. Kernisant
Grantham, US
★★★★★ 5
Simple yet easy must have for discerning coffee drinkers
Color: Black&Silver
I seem to never get the same results from my coffee machine and it varied even more with the new brand that we just bought. I now have to make more adjustments with the water temperature, based on age, type of beans, etc. That affects the amount of ground dispensed and consistency in the shot until I get a new batch dialed in. So the only way to regulate these changes is to weigh both the beans and water. Using this little scale has made things easier, less frustrating and more predictable. What’s awesome is that it will automatically begin the timer with the first drop and stop when the pressure remains constant. Simple yet easy and super convenient. If you are looking for a great little digital scale this should do the trick. Highly recommended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 4, 2026
M
Verified Purchase
Memphis Tigers 🐯
Cuba, US
★★★★★ 5
Great Digital Scale!!
Color: Black&Silver
The Maestri House S2 scale has been clutch for dialing in my espresso shots. Memphis heat or not, this thing stays accurate and steady. The timer starts up quick, the readings are fast, and the compact size fits perfectly under my Breville without feeling cramped. It’s built solid, charges by USB‑C, and the precision really shows when you’re trying to get that perfect pull.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
J
Verified Purchase
John
Draper, US
★★★★★ 4
Has fit perfectly into my morning espresso
Color: Black&Silver
This seems to me to be an excellent small kitchen scale. I am new to the complexities of espresso making and have begun using this scale every morning to measure my dose and output. It is working just fine. Easy to operate, keep clean and store. I did not give it 5 stars because I have limited comparisons but I don’t expect and will not bother looking for anything better.
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Reviewed in the United States on May 30, 2026
D
Verified Purchase
D. Lakin
Charlottesville, US
★★★★★ 5
Perfectly fits what I needed for my espresso habit!
Color: Black&Silver
This Maestri House mini coffee scale is a great little tool for espresso and pour-over. The size is compact enough to fit under a portafilter or cup, and the 0.1g accuracy makes dialing in coffee much easier. I like the built-in timer, rechargeable USB-C battery, and clean black-and-silver look. It feels precise, practical, and easy to keep near the espresso machine. Great value for anyone who wants more consistent coffee.
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Reviewed in the United States on June 2, 2026

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