Best Sans Water Purifier Undercounter in 2025
Updated on June 2025
#1
Recommended
25% Off
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- Advanced reverse osmosis filtration technology effectively removes contaminants like heavy metals, chlorine, and sediments for high water quality.
- Impressive 5:1 pure to drain ratio minimizes waste, producing one gallon of purified water for every gallon used.
- Large capacity with a 5L raw water tank and 2L pure water tank, providing approximately 529 gallons of purified water.
- UV purification system combined with 5-stage filtration destroys 99.99% of microorganisms for thorough sterilization.
- No installation required; simply plug in to enjoy clean, filtered water within minutes.
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- Advanced reverse osmosis filtration technology effectively removes contaminants like heavy metals, chlorine, and sediments for high water quality.
- Impressive 5:1 pure to drain ratio minimizes waste, producing one gallon of purified water for every gallon used.
- Large capacity with a 5L raw water tank and 2L pure water tank, providing approximately 529 gallons of purified water.
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#2
Value for Money
30% Off
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- Tested and certified by SGS against NSF/ANSI 58 and EPA 537 standards, it effectively removes over 99.99% of 1,000+ contaminants from tap or well water with TDS below 500 ppm, including viruses, bacteria, heavy metals, and chemicals.
- Employing a UV purification system, it eliminates 99.99% of microorganisms without chemicals or by-products, enhanced by a 3-stage RO filtration system for superior water safety.
- No installation is necessary; just plug in for instant purified water, making it suitable for various settings like homes and offices.
- Featuring a 4:1 pure to drain ratio, this system optimizes water use compared to other RO systems, saving up to 1500% more water with a rapid dispense rate for quick access to purified water.
- Based in Seattle since 2006, SimPure ensures quality water filtration and provides ongoing customer support.
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- Tested and certified by SGS against NSF/ANSI 58 and EPA 537 standards, it effectively removes over 99.99% of 1,000+ contaminants from tap or well water with TDS below 500 ppm, including viruses, bacteria, heavy metals, and chemicals.
- Employing a UV purification system, it eliminates 99.99% of microorganisms without chemicals or by-products, enhanced by a 3-stage RO filtration system for superior water safety.
- No installation is necessary; just plug in for instant purified water, making it suitable for various settings like homes and offices.
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#3
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- Improves water taste significantly compared to typical bottled water, making it ideal for drinking and brewing coffee at home.
- Easy installation directly to your 3/8" or 1/2" water pipe, with support available through instructional videos and customer service.
- Offers rapid water flow of up to 1.59GPM, filling an 8-ounce cup in approximately 2.3 seconds, perfect for quick meal preparation and baby formula mixing.
- Long-lasting filters: PP filter lasts 6-8 months, UF for 12 months, and CT for 12-24 months, reducing plastic waste equivalent to planting 20,000 trees each year.
- Equipped with a 6-layer filtration system that effectively removes impurities larger than 0.01 microns, including chlorine and heavy metals.
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- Improves water taste significantly compared to typical bottled water, making it ideal for drinking and brewing coffee at home.
- Easy installation directly to your 3/8" or 1/2" water pipe, with support available through instructional videos and customer service.
- Offers rapid water flow of up to 1.59GPM, filling an 8-ounce cup in approximately 2.3 seconds, perfect for quick meal preparation and baby formula mixing.
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#4
33% Off
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- 5-stage filtration system removes 99.99% of harmful contaminants, ensuring access to clean drinking water.
- No installation needed; simply plug in for easy and efficient water filtration.
- Backed by SGS testing and complies with NSF/ANSI 58 and EPA certifications for safety and reliability.
- Adjustable settings for 4 temperatures and 6 water volumes to meet various needs.
- 5L water tank provides ample supply with a 4:1 pure to drain ratio, promoting water conservation.
- Includes customer support and real-time monitoring of water quality and filter life.
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- 5-stage filtration system removes 99.99% of harmful contaminants, ensuring access to clean drinking water.
- No installation needed; simply plug in for easy and efficient water filtration.
- Backed by SGS testing and complies with NSF/ANSI 58 and EPA certifications for safety and reliability.
- Adjustable settings for 4 temperatures and 6 water volumes to meet various needs.
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#5
18% Off
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- 8-stage filtration system with a 0.0001μm RO membrane eliminates over 1,000 contaminants, achieving a 99.9% removal rate including heavy metals, chlorine, and microplastics, along with UV sterilization for safe drinking water.
- User-friendly control panel enables quick selection of various temperatures (Ambient/115℉/140℉/185℉/205℉) and water volumes (4 oz/8 oz/12 oz/16 oz) making it ideal for coffee, baby formula, or tea.
- 4:1 pure to drain ratio promotes water efficiency, allowing wastewater to be recycled for tasks like watering plants or cleaning.
- Constructed from food-grade materials and certified by NSF/ANSI and EPA, ensuring safe, odor-free water. The easy-to-replace filter cartridges and UV sterilization maintain high water quality, suitable for families, including infants and pets.
- Extra-large 237oz water tank reduces refill frequency, designed for home, office, or outdoor use. Its compact structure fits easily on countertops with no installation required, providing convenient access to fresh water.
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- 8-stage filtration system with a 0.0001μm RO membrane eliminates over 1,000 contaminants, achieving a 99.9% removal rate including heavy metals, chlorine, and microplastics, along with UV sterilization for safe drinking water.
- User-friendly control panel enables quick selection of various temperatures (Ambient/115℉/140℉/185℉/205℉) and water volumes (4 oz/8 oz/12 oz/16 oz) making it ideal for coffee, baby formula, or tea.
- 4:1 pure to drain ratio promotes water efficiency, allowing wastewater to be recycled for tasks like watering plants or cleaning.
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#6
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- Premium borosilicate glass carafe for safe water storage with a 7-stage RO system that includes UV filtration and remineralization for enhanced purity and mineral balance.
- Smart LED control panel for easy monitoring, filter alerts, and customizable water volume selection, providing real-time water quality insights.
- Designed for rapid filtration with a 375% improvement over traditional systems, operating at a 3:1 filtered to waste water ratio, requiring annual filter changes at minimal cost.
- Compact design suitable for small spaces, featuring a user-friendly 7-stage UV reverse osmosis system, certified for lead-free water and easy annual filter maintenance.
- Includes a glass infuser for creating flavorful fruit-infused water, promoting healthy hydration habits and helping track daily intake.
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- Premium borosilicate glass carafe for safe water storage with a 7-stage RO system that includes UV filtration and remineralization for enhanced purity and mineral balance.
- Smart LED control panel for easy monitoring, filter alerts, and customizable water volume selection, providing real-time water quality insights.
- Designed for rapid filtration with a 375% improvement over traditional systems, operating at a 3:1 filtered to waste water ratio, requiring annual filter changes at minimal cost.
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#7
40% Off
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- 7-stage purification with a 5-in-1 RO filter, CTO, and UV light ensures highly purified water, removing 99.99% of contaminants including heavy metals, chemicals, and pathogens
- Rapid cooling capability allows users to enjoy chilled water (43-59℉) without refrigeration, avoiding fridge odors
- Integrated filter design simplifies maintenance with fewer replacements and clear filter life indicators
- User-friendly countertop design requires no installation, making it convenient for various living spaces
- Portable pitcher keeps water fresher and allows easy access to purified water away from the system
- Reliable customer support from Seattle-based SimPure, committed to water filtration since 2006, with assistance available for product-related questions
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- 7-stage purification with a 5-in-1 RO filter, CTO, and UV light ensures highly purified water, removing 99.99% of contaminants including heavy metals, chemicals, and pathogens
- Rapid cooling capability allows users to enjoy chilled water (43-59℉) without refrigeration, avoiding fridge odors
- Integrated filter design simplifies maintenance with fewer replacements and clear filter life indicators
- User-friendly countertop design requires no installation, making it convenient for various living spaces
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#8
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- Aquaporin Inside technology enhances water filtration, ensuring high selectivity and durability, validated by NASA and ESA for astronaut use.
- 5-stage reverse osmosis filtration down to 0.0001 micron effectively reduces TDS, lead, calcium, and chromium, certified for lead-free materials.
- Compact design (5x13x14 inches) fits easily in various environments such as homes, RVs, and offices, suitable for safe water filtration.
- Instant filtration with a simple button press, dispensing a consistent 16.9 oz of clean water without requiring plumbing installation.
- BPA-free materials used for all water-contact parts, with a 9-cup detachable reservoir for easy refilling and a filter lifetime indicator for maintenance reminders.
- Includes a reusable 16.9 oz glass bottle for storing fresh water in the refrigerator, enhancing hydration convenience.
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- Aquaporin Inside technology enhances water filtration, ensuring high selectivity and durability, validated by NASA and ESA for astronaut use.
- 5-stage reverse osmosis filtration down to 0.0001 micron effectively reduces TDS, lead, calcium, and chromium, certified for lead-free materials.
- Compact design (5x13x14 inches) fits easily in various environments such as homes, RVs, and offices, suitable for safe water filtration.
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#9
- Advanced 6-stage filtration with UV light, featuring a 0.0001μm RO membrane and remineralization filter, effectively reduces contaminants and enriches water with essential minerals.
- Portable countertop design with high borosilicate glass carafe eliminates the need for plumbing or installation, reducing the risk of secondary pollution.
- Energy-efficient operation with automatic power-saving mode and a 2:1 Pure to Drain water-saving ratio to minimize waste.
- Long-lasting filters with a lifespan of 12-24 months, equipped with a monitor display for tracking filter service life and water quality.
- Manufactured with high-quality components for durability, promoting sustainable hydration by reducing plastic waste through bottled-quality water at home.
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- Advanced 6-stage filtration with UV light, featuring a 0.0001μm RO membrane and remineralization filter, effectively reduces contaminants and enriches water with essential minerals.
- Portable countertop design with high borosilicate glass carafe eliminates the need for plumbing or installation, reducing the risk of secondary pollution.
- Energy-efficient operation with automatic power-saving mode and a 2:1 Pure to Drain water-saving ratio to minimize waste.
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#10
24% Off
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- Replacement filters available for under $25.99, offering over 50% savings on future purchases.
- Comprehensive after-sales assistance with performance service for the WD-10UA filter; support available for any quality issues.
- Independently certified filter effectively reduces PFAS, lead, chlorine, and other contaminants, ensuring clean drinking water. Made from BPA-free and lead-free materials, it also minimizes chlorine taste and odor with IAPMO certifications.
- Innovative design allows for easy installation in three minutes and quick filter replacement. Compatible with standard 3/8" and 1/2" cold water pipes.
- Upgraded filtration area provides 20X better dirt adhesion, reducing clogging risks and enhancing filtration efficiency.
- Each filter system lasts up to 12 months or 8,000 gallons with municipal water, suitable for entire household needs.
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- Replacement filters available for under $25.99, offering over 50% savings on future purchases.
- Comprehensive after-sales assistance with performance service for the WD-10UA filter; support available for any quality issues.
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