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iSpring Under Sink Direct Connect Drinking Water Filtration Systems

This page showcases a selection of direct-connect under-sink water filtration systems from iSpring.

Product Listings

iSpring 2-Stage Undersink Water Filter

• Heavy Duty Water Filter System: Made of quality material for all components and equipped with 10” x 4.5” filters, this heavy duty undercounter water filter system is designed to provide you and your loved ones with a continuous on-dem

Price: $235.99

iSpring US21B-CPB Under Sink Water Filter

• Enhanced Filtration Capacity: The US21B-CPB under sink filter system includes 2 filters and features a 4-layer deep filtration process. The 1st stage FG15B-KS effectively reduces PFAS, PFOA/PFOS, chlorine, mercury, cloudiness, colors, bad taste, an

Price: $251.99

iSpring US21B-PF Under Sink Water Filter

• Enhanced Filtration: 7-layer filtration reduces lead, chlorine, heavy metals, bad taste, odor, and more for cleaner, safer water.
• PFAS Reduction: SGS-tested second-stage filter removes up to 99% PFAS, delivering healthier water straight f

Price: $345.99

iSpring US15SD Direct Connect Under Sink Water Filter System

• Composite Filtration. iSpring US15SD under sink water filter system is a single-stage direct connect design with high capacity multi-layer filtration. US15SD's composite filter cartridge can effectively reduce lead, chlorine, smell, bad taste, heav

Status: Out of Stock. Price: $73.99

iSpring UVF8 LED UV Water Filter Add-On Kit

• Innovative and Modern LED Technology: The UV-C LED is an innovative technology for providing clean and effective water treatment. Compared to traditional UV light, it does not contain mercury and will not emit odors by producing oz

Price: $149.99

Detailed Product Descriptions

iSpring US21B Heavy Duty 2-Stage Undersink Water Filtration System

• Heavy Duty Water Filter System: Made of quality material for all components and equipped with 10” x 4.5” filters, this heavy duty undercounter water filter system is designed to provide you and your loved ones with a continuous on-demand supply of refreshing water whenever your kitchen faucet is on. No waste water. No tank taking up your under sink space.
• 10"x4.5" Filters: 1st stage KDF plus GAC carbon filter(FG15B-KS) and 2nd stage CTO carbon block filter(FC15B) can remove up to 99% of contaminants, including chlorine, lead, mercury, and many other heavy metals. They also tackle problems like turbidity, cloudiness, colors, bad taste, and odors(e.g. hydrogen sulfide that smells like rotten eggs). A true shield that protects you and your family from ingesting harmful chemicals or contaminants in your tap water.
• Steady Water Flow: Thanks to the system’s connection design and its 1” inlet and outlet ports, you will experience less waiting time when filling up your glasses, pitcher, coffee pot, or cooking pots as the peak water flow rate is up to 15 GPM. Based on the contaminant levels in source water and your water use, we suggest that you change your filters every 6-12 months for ideal filtration performance.
• Easy DIY Installation: Comes with two 24-inch DIRECT CONNECT hoses that connect the system to the existing under sink incoming water supply and the cold water line of your kitchen faucet. Unlike reverse osmosis systems, you don’t need to spend time drilling a hole on your countertop for a RO faucet. Tool free. No mess. System installation and filter cartridge replacement are a breeze!
• TDS Note: Please be noted that the system is NOT designed to reduce Total Dissolved Solids(TDS) removal and instead keeps essential minerals in your water. If you are interested in a filter that significantly reduces TDS, please consider our iSpring Reverse Osmosis (RO) systems RCC7 series or tankless RO500.
• Peace-of-Mind Support: We offer tech and CS support via phone and email from Atlanta, GA. Contact our responsive and professional team for product selection to suit your water filtration needs and after-sale support to fully enjoy your user experience. Now, and years to come, we will be right here and ready to help.

Price: $235.99

iSpring US21B-CPB 4-Layer High Capacity Under Sink Water Filter

• Enhanced Filtration Capacity: The US21B-CPB under sink filter system includes 2 filters and features a 4-layer deep filtration process. The 1st stage FG15B-KS effectively reduces PFAS, PFOA/PFOS, chlorine, mercury, cloudiness, colors, bad taste, and many other heavy metals. The 2nd stage FC15B-PB is SGS tested to reduce up to 99% lead from water.
• Expanded Filtration Surface: Our upgraded under sink water filtration features an expanded filtration surface, allowing for more effective removal of contaminants. This ensures clean & healthy water for your household, enhancing your overall water quality and providing peace of mind.
• 80K High Capacity: With 1" inlet and outlet ports, the system reduces waiting time when filling glasses, coffee pots, or cooking pots. It offers a high capacity of up to 80,000 gallons. For best performance, up to 12 months change filters based on your water's contaminant levels and usage.
• Effortless DIY Installation: The under sink system includes 2 upgraded 48-inch DIRECT CONNECT hoses that easily link to your existing under-sink water supply and kitchen faucet. Unlike other undersink water filters, this setup requires no countertop drilling or extension hoses. It's tool-free and mess-free, making installation and filter replacement a breeze.
• Premium Quality Construction: Made with high-quality materials and premium 10" x 4.5" filters, the iSpring US21B-CPB provides safe, clean water for drinking and cooking straight from your tap. This durable under-sink filter system offers a continuous supply of refreshing filtered water without wasting space or water.
• Reliable Customer Support: We offer tech and customer support via phone and email from Atlanta, GA. Contact our team for product selection and after-sale support to enhance your experience. We're here to help now and in the future. Note: This filter system does NOT reduce Total Dissolved Solids (TDS) but keeps essential minerals in your water.

Price: $251.99

iSpring US21B-PF Under Sink Water Filter

• Enhanced Filtration: 7-layer filtration reduces lead, chlorine, heavy metals, bad taste, odor, and more for cleaner, safer water.
• PFAS Reduction: SGS-tested second-stage filter removes up to 99% PFAS, delivering healthier water straight from your kitchen tap.
• Larger Surface Area: 40% larger filtration surface captures more contaminants, improving water quality for drinking, cooking, and daily use.
• Higher Capacity: Filters up to 8,000 gallons without affecting flow rate; lasts up to a year at 1 GPM (EPA regulation).
• DIY Installation: Includes 48-inch direct-connect hoses; install easily without drilling, special tools, or creating a mess under the sink.
• iSpring Premium Quality: Commercial-grade materials and standard-sized filters ensure reliable performance and durability for years to come.
• iSpring Premium Support: US-based team offers expert advice and after-sale support via phone or email for your peace of mind.
• Note: Does not reduce Total Dissolved Solids (TDS); retains essential minerals; not recommended for unsoftened water with hardness >500.

Price: $345.99

iSpring US15SD Direct-Connect Under Sink Water Filter System

• Composite Filtration: iSpring US15SD under sink water filter system is a single-stage direct connect design with high capacity multi-layer filtration. US15SD's composite filter cartridge can effectively reduce lead, chlorine, smell, bad taste, heavy metals, sediment, and other large particles while keeping healthy minerals in your filtered water. The filtration does not lower TDS but will retain useful minerals.
• Long Life Service & Multiple Use: The filter system has long service life for drinking, cooking, and cleaning. The composite multi-layer filter can filter water down to 3 microns. It works great with standard kitchen or bathroom faucets. Fits 1/2" NPT or 3/8" Comp threads with included adapters. Durable metal bracket and quality braided stainless steel hoses. Filter change is a breeze.
• Innovative Design: The direct connect under the counter water filter has an easy DIY installation design. It only takes you a few minutes to finish installing. The filter replacement process is easy. With our new concise design and suitable size, the filter system can perfectly fit into any place at your house. The system should be connected only to a COLD WATER supply.
• Cost-Effective: Average 8-12 month filter service life and only filter cartridge need to be changed. iSpring US15SD helps you save filter replacement costs to better protect the environment.
• Leak-Free improvement: Our new version adapter and O-rings design prevent water leaks more effectively. US15SD treats water effectively with the high flow right with minimal pressure drop.

Status: Out of Stock. Price: $73.99