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Description
OptiPure SX21-RK, 252-60110, SX2 10 inch Replacement KitSX21RK Part # 252 60110 The SX21 RK is a 10 Drop In cartridge kit that utilizes ScaleX2, a chemical free scale inhibition technology that utilizes Template Induced Crystallization to effectively inhibit the formation of calcium carbonate scale. This cartridges are ideal for applications requiring up to 1 1 2 gpm flow. In most cases, the cartridge will perform for one year between filter changes. The SX21RK consists of (1) CTO 10 carbon impregnated
SX21RK
Part # 252-60110
The SX21-RK is a 10” Drop-In cartridge kit that utilizes ScaleX2®, a chemical-free scale inhibition technology that utilizes Template-Induced Crystallization to effectively inhibit the formation of calcium-carbonate scale. This cartridges are ideal for applications requiring up to 1-1/2 gpm flow. In most cases, the cartridge will perform for one-year between filter changes. The SX21RK consists of (1) CTO-10 carbon impregnated cartridge that filters down to 0.5 micron for taste and odor, and (1) SCLX2-1 ScaleX2® cartridge.
Applications
Drop-in style cartridge kit for OptiPure 10" SX2 Systems.
Replacement Cartridge Kit for:
► OptiPure SX2-11 - 160-50131, SX2-21 - 160-00350
Features and Benefits:
• ScaleX2® acheived a 99.6% effectiveness rating when tested by an independent laboratory against the international protocol for scale prevention.
• Gradient-density depth filtration reduces dirt, rust, and other debris as small as 1/2 micron to assure clean, clear water and protect solenoids, valves and other fittings against wear and plugging.
• Reduces maintenance frequency and cost, and extends equipment life.
• High capacity cartridge extends filter system life reducing maintenance frequency.
• Activated carbon filtration makes water taste great and protects equipment against corrosive chlorine.
• Protects boilers, steam generators and coffee equipment against the formation and accumulation of calciumcarbonate scale.
• Generates less waste, only the drop-in cartridge is replaced. No discarding of metal or plastic quick-change filters.
• Replacement cartridge cost per gallon is much less than proprietary quick-change filters.
• NSF Certified under Standard 42 as replacement cartridge in OptiPure SX2 series systems.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.4 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 5
Great sheet set
Color: Blush Pink, Size: Full
Super soft right out of the package. Thin material but should be perfect for cool nights. Blush pink is the perfect shade of pink. Love this set. Highly recommended especially at this price point.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Perfect Lightweight Sheets for Sensitive Hot sleepers
Color: Cream, Size: Queen
These sheets are soft, thin, and absolutely perfect for me. I have advanced CRPS and erythromelalgia, so I deal with severe nerve burning and heat sensitivity and cannot tolerate being overheated at all. I keep our AC between 56–64 degrees constantly, and since our studio is small, it usually stays around 61–63.
These sheets have been a lifesaver for sleep. They are lightweight, breathable, and don’t trap heat, which helps me avoid extreme flare-ups and the intense burning pain I deal with. I'm bedridden so I need to be comfortable. They feel comfortable against my skin and don’t worsen my symptoms when I’m already in a lot of pain and look nice, wash nicely.
For the price, they are also a great value. I’m genuinely grateful to have found something that helps me rest more comfortably. Will be buying more for us and gifts.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Sheet set
Color: Burgundy, Size: Queen
This lightweight microfiber sheet set stands out for its softness, comfort, and elegant design. Its fabric feels cool to the touch, withstands daily use, and is easy to wash, retaining its vibrant color wash after wash. It is an excellent choice for adding a cozy and sophisticated touch to the bedroom at an affordable price.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Great set of sheets
Color: Blue Pinstripe, Size: Twin
These microfiber sheets are incredibly soft and comfortable, especially for the price. I purchased the blue and white set for my daughter’s bed, and she loves them. The colors are bright and exactly as pictured. They fit the mattress well, don’t slip off the corners, and wash up nicely without pilling or fading. The brushed microfiber feels cozy and lightweight, making them great for year-round use. Overall, a great value and I would definitely buy another set.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Bold Colors, Great Quality, and an Amazing Price - Perfect Everyday Sheets
Color: Black, Size: Full
The Amazon Basics lightweight bed sheets have been such a great buy for my boys’ bedrooms. They come in a wide variety of colors, which made it easy to match each room’s style — and the colors stay bold and vibrant even after multiple washes, which honestly surprised me.
The quality is excellent for the price. The fabric stays soft, doesn’t pill, and holds up well to frequent washing (a must in kids’ rooms!). Each set includes a fitted sheet, flat sheet, and two pillow shams, which makes the value even better — most sets at this price point don’t include that many pieces.
Overall, these sheets are affordable, durable, colorful, and comfortable. I loved them enough to buy them in multiple colors, and they’ve held up beautifully. A fantastic budget-friendly choice for any household.
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Reviewed in the United States on May 31, 2026
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