Does this system require electricity to operate?No, the US31 under-sink water filtration system does not require electricity. It works on water pressure alone. How much water pressure is required for it to work?The feed water pressure should be: 30-70 psi How long do the filters last before needing replacement?The filters should be replaced every 6 to 12 months, depending on usage and water quality. This ensures optimal performance and water quality. Will it reduce TDS?No, this under-sink water filtration system does not reduce TDS levels. Instead, it maintains the TDS of the incoming water, preserving essential minerals. If TDS reduction is necessary, we recommend considering an iSpring reverse osmosis system. |
iSpring US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment GAC Carbon (Newest Version)
-3%
$138.99
$142.99
About this item
- [Classic Drinking Filter]: The water undergoes a three-stage purification process: PP sediment filtration, GAC carbon filter and a unique CTO filtration in the 3rd layer. This system efficiently removes common drinking water sediments such as dust, sand, particles, dirt, and rust. Additionally, it effectively eliminates heavy metals, harmful chemicals, Chloramine, cloudiness, colors, chlorine taste, and odor. It's important to note that this under sink water filtration system DOES NOT lower TDS value but preserves the healthy minerals in your water. Enjoy pure, great-tasting water with essential minerals intact.
- [Fresh Healthy Water Supplier]: The on-demand fast flow rate of the iSpring US31 allows it to meet the widest possible range of needs in your home. Up to 20x more effective than the common water pitcher dispenser. Flow Rate: Up to 1GPM depending on source water pressure. Maxim Pressure: 90psi. It washes fresh produce like fruit and vegetables, brings health protection, can provide your entire family with delicious, clean water straight from your tap.
- [Excellent Quality and Design]: Features beautiful European-designed brushed nickel all-metal faucet and clear see-through 1st stage housing. Clear see-through 1st stage housing makes filter inspection a snap. Manufactured to comply strictly with FDA standards and tested by independent third party against NSF/ANSI standards (42, 53, 61) for water quality, material safety and structural integrity.
- [Easy to Install and Maintain]: Designed for hassle-free installation and maintenance, the system includes a high-capacity sediment filter, GAC filter, and CTO carbon filter. The sediment filter protects and extends the life of your system, while the GAC and carbon filters efficiently remove harmful contaminants. Filters should be replaced every 6 to 12 months, depending on water quality.
- [TDS Note and Customer Services]: This under sink water filter will not reduce the TDS of the incoming water. Instead, it keeps the healthy minerals in your water. If you are interested in a filter that removes TDS, please consider a iSpring reverse osmosis system.Backed by a 1-year Manufacturer with lifetime support from Atlanta, GA USA. For any issue or concern, please don't hesitate to contact us.
Frequently Bought Together

iSpring US31 Classic 3-Stage Under Sink Water Filtration System for Drinking, Tankless, High Capacity, Sediment GAC Carbon (Newest Version)
$138.99
-3%
$142.99
$142.99
- Availability: In Stock
- Model: US31
- Manufacturer: iSpring
- Product Dimensions: 13.00"L x 14.50"W x 6.00"H
- Product Weight: 13.00 LB
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US31 Manual