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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
4.7 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days.
The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Super cute, comfortable, practical, love that they are slip on
Size: 10.5, Color: Tobacco/Black
I have worn these 2-3 times already. The first day was a school/work day so I was on my feet 9 hours and the only issue I had was with the side of the boot rubbing against my ankle. I just make sure I wear socks high enough to cover my ankles or jeans that go into the boots now for long wear days.
Absolutely love them! They keep my feet dry in this snow( we live in Michigan). I had been looking for a pair like this for awhile now and was getting super frustrated that I couldn't find my size in any that I liked. I saw that they had these available in a 10.5 and I wear 11. I looked at the Sorel website reviews (since the amazon ones weren't super helpful on sizing) and they said that the boots ran big so I took a chance on the 10.5 fitting me. They fit perfect. I have long narrow feet but I could see where they would be tight or uncomfortable on someone with wider feet. I've been trying to find a pair for my mom now since she has boot envy.
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Beautiful Crossbody!
Color: Vanilla/Acorn
In my opinion, this is the perfect crossbody. First, it is very stylish- Michael Kors Signature design & lovely leather trim. I have been searching for a crossbody and this fits all my needs. Zipper pocket is perfect for my cell phone, inside has plenty of room and is a few inches wide at the bottom- not flat. The shoulder strap is wider at the shoulder for comfort- such a nice feature. Great bag!!!
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Reviewed in the United States on May 31, 2026
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