iSpring 3-Stage Under Sink Tankless Water Filtration System, Bacteria and Viruses Removal, w/ Up to 1-Year Replacement Filter Set & Fridge Connection Kit (Model: US31-BV)
$264.99
About this item
- 3-Stage Filtration Under the Sink – US31-BV uses a PP sediment stage, CTO carbon block, and a specialty CTO membrane to reduce sediment, chlorine, taste & odor, bacteria, and viruses.
- Superior Quality – Built with high-quality components and a transparent first-stage housing for easy filter inspection. Tested to NSF/ANSI 42, 53, and 61 standards, and compliant with FDA guidelines for performance and durability.
- 1500-Gallon Capacity (~6–12 Months) – High capacity design delivers up to 1,500 gallons of clean water before filter replacement is needed.
- Up to 1 GPM Flow Rate – Provides reliable flow for drinking, cooking, and rinsing produce, consistent with standard under-sink systems.
- F3-BV & ICEK Included – Bundle includes F3-BV replacement filter pack for up to 1 year of clean water and the ICEK fridge connection kit to enjoy filtered water and ice directly from your refrigerator.
Frequently Bought Together

iSpring US31-BVF3I 3-Stage Under Sink Tankless Water Filtration System, Bacteria and Viruses Removal, w/ Up to 1-Year Replacement Filter Set & Fridge Connection Kit (Model: US31-BV)
$264.99
- Availability: In Stock
- Model: US31-BVF3I
- Manufacturer: iSpring
- Product Dimensions: 14.00"L x 5.25"W x 14.00"H
- Product Weight: 13.00 LB
-
iSpring ORF O-Ring for 10 inch Water Filter Housing Oring
$6.99 -
iSpring FC15 NSF/ANSI 58 Certified Standard 10 inch CTO Carbon Block Water Filter Cartridge Replacement, 5 Microns
$22.99 -
iSpring FP15 NSF/ANSI 58 Certified 5 Micron 10"x2.5" Standard Sediment Water Filter Filter Cartridges
$18.99 -
iSpring AWR2 2-in-1 Reverse Osmosis Pre-Filter Housing and RO Membrane Canister Wrench
$18.99 -
iSpring HC12 1/4'' Water Filter Housing 10 inches, Clear
$27.99 -
iSpring HW12 10 inches Reverse Osmosis Water Filter Housing - White, 1/4 Inch
$28.99 -
iSpring T14W Reverse Osmosis RO Water Filter DI Aquarium 1/4" Tubing, White, 50 ft
$23.99 -
iSpring T14B Reverse Osmosis RO Water Filter DI Aquarium 1/4" Polyethylene Tubing, 50 ft, Blue
$23.99 -
iSpring ICEK Ultra Safe Fridge Water Line Connection and Ice Maker Installation Kit for Reverse Osmosis RO Systems & Water Filters, 1/4", Approximate 20 feet
$21.99 -
iSpring AFW43 Feed water adapter, Sliver
$19.99 -
iSpring GA1-BN Heavy Duty Non-Air Gap Drinking Faucet for Water Filtration, Reverse Osmosis Systems-Brushed Nickel-Contemporary Style High-Spout
$45.99 -
iSpring AIG1 Easy-Install Top Mount Reverse Osmosis RO Drinking Water Faucet Installation Accessory Kit, US Patent Pending
$11.99 -
iSpring ASKRCC Slide-Out Mounting Kit for Under Sink Reverse Osmosis Water Filter System, Fits RCC Series
$80.99 -
iSpring FC15-BV Replacement Water Filter, CTO Pleated Water Filter Cartridge for US31-BV & CW31-BV, Removes Bacteria & Viruses, Up to 12 Months
$57.99 -
iSpring F3-BV Water Filter Replacement Pack for US31-BV and CW31-BV
$62.99
-
Start Download
US31 Manual