City Water Salt-Based Water Softener and Filter Combo with UV

Model Number: E-4000UV

Enjoy softer, cleaner, safer water throughout your home with the Kind Water E-4000UV - our premium whole-house filtration, smart-metered salt-based softening, and UV disinfection system for City Water. Minimize scale, protect your plumbing and appliances, and eliminate stubborn hard-water spots while enjoying fresher, better-tasting water.

With whole-house filtration to reduce sediment, chlorine, pesticides, and chemical contaminants - plus powerful UV protection against bacteria and viruses - the E-4000UV delivers a noticeably better shower, laundry, skin, and hair experience with efficient, low-maintenance performance.

120 Day Satisfaction Guaranteed

Same Day Shipping

Lifetime Warranty

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How It Works: 4 Stages of Protection

4 Stages of Protection

The E-4000UV Whole House Filter and Salt-Based Water Softener Combo with UV provides the Ultimate Protection for your well water by combining our Most Advanced Smart Kind Water View Metered Technology.

95%

of sediment filtered

155+

contaminants targeted`

99%

calcium and magnesium removed

99.9%

bacteria and viruses sterilized

Stage 1

Sediment Filter

Captures fine dirt, sand, rust, and debris—blocking up to 95% of particulates in your water

Stage 2

Carbon Filter

Filters 155+ contaminants like chlorine, chloramine, VOCs and pesticides for great tasing and better than bottled quality water.

Stage 3

Salt-Based Water Softener

Prevents hard water limescale by treating calcium and magnesium, protecting plumbing and appliances while eliminating water spots.

Stage 4

UV disinfection

Sterilizes 99% of bacteria and pathogens using chemical-free UV light for safer, healthier water at every tap.

Stage 1

Sediment Filter

Filters dirt, sand, rust and debris from entering your home

5-micron pleated design traps up to 95% of particulates

Oversized 20” filter ensures maximum capacity and maintains  strong flow (15 GPM)

Eco-friendly: Washable and reusable. Manufactured using  FDA approved materials

Replace every 6-12 months for best performance

Made in the USA

Why it matters:

Effectively captures dirt, sand, rust, and debris to deliver cleaner water as it moves to the next stage of carbon filtration.

5-Micron Pleated Sediment Filter

95% of Particles Filtered

Designed to eliminate 95% of visible particulate matter and particles of dirt, sand, silt, clay, rust, and other debris, an essential first step that ensures clean, clear water reaches the next stage and extends the life of the carbon filter.

Strong 15 GPM (Gallons Per Minute) Flow

Our five layer 20” pleated sediment filter is twice the size of standard filters, delivering double the filtering capacity and filter life, with a pleated design that maintains high flow and minimal pressure drop. 5-micron filters down to 14 times smaller than a human hair.

Washable and Reusable

Made from durable polypropylene, this sediment filter can be washed and reused multiple times if you live in an area with heavy sediment.

Stage 2

Carbon Filter

Delivers cleaner, better-tasting, and clearer water to every faucet in your home

Targets chlorine, chloramine, VOCs, pesticides, herbicides and other contaminants.

See full list 155+ contaminant list

Certified: NSF/ANSI - 42 -chlorine, taste, and odor reduction and NSF/ ANSI - 61 (drinking water safety)

Replace media every 5 years or 600,000 gallons for best performance

All wetted parts are NSF/WQA approved

Tanks and Media made in the U.S.A.

Why it matters:

Enjoy crisp, clean water with fewer odors and better taste — straight from every tap. Better-than-bottled-water quality that’s also gentler on your skin and hair.

Carbon Media

NSF/ANSI 42 Certified for Chlorine Reduction

Our Granular Activated Carbon filter uses the most advanced whole house water filtration technology to protect against Chlorine, Chloramine, and other harmful chemicals commonly found in water, which also affect its taste and odor.

Effective Against VOCs and Chemical Contaminants

Using a process called adsorption, the carbon effectively reduces contaminants like Volatile Organic Compounds (VOCs), Total Trihalomethanes (THMs), and Haloacetic Acids (HAAs).
See full 155+ contaminant list.

Improves taste and smell, Great for your Skin and Hair

Removing contaminants improves the taste and odor of your water and provides better-than-bottled quality water from every faucet. Clean water is also great for your skin and hair.

Stage 3

5. Salt-Based Water Softener

Enjoy soft water throughout your home by eliminating hardness (Calcium & Magnesium)

Prevents and removes hard water limescale/calcium build up in your plumbing and appliances.

Enjoy softer skin and hair, protect your plumbing and appliances plus eliminate unsightly hard water scale and spots.

Resin media lasts 15-20 years based on water quality

Salt refills needed every 4–6 weeks, depending on household water use and hardness levels.

All wetted parts are NSF/WQA approved

Tanks and Media made in the U.S.A.

Why it matters:

Protects your home from scale damage, eliminates water spots by removing hardness minerals from every drop of water you use.

Smart View Metered Salt-Based Water Softener

Hardness Removal:

Removes up to 99% of calcium and magnesium from your water

Regenerates Only When Needed

Metered technology tracks actual water use and triggers regeneration only when the resin is near capacity, saving water and salt.

Smart Legacy View

Our innovative Well System electronic head gives you complete control over your system’s settings in the palm of your hand using bluetooth technology. Standalone design with self-contained regeneration using a single resin/brine tank system and 9 V battery backup maintains meter and safely stops regeneration if the power fails.

Stage 4

UV Disinfection System

Powerful protection against invisible threats such as bacteria, viruses and other pathogens

High 15 GPM flow stainless steel chamber with high-grade quartz UV lamp

99.9% of bacteria and viruses sterilized

Certified: NSF/ANSI - 55 (Disinfection Performance and Microbial Safety)

Smart alerts for lamp/sleeve replacement every 12 months

Made in Canada

Why it matters:

Peace of mind that every drop is free of harmful pathogens such as bacteria and viruses - important for households with kids or elderly and areas with boil water notices.

UV Disinfection System

NSF/ANSI 55 Certified for Disinfection and Microbial Safety

Utilizes chemical-free physical alteration with a strong quartz UV lamp to disinfect water by sterilizing 99.9% of bacteria including E.coli, viruses, and chlorine-resistant microorganisms like cryptosporidium and giardia—without changing taste or smell.

Chemical-Free Disinfection

Unlike city water treatment that relies on chemical disinfection with chlorine or chloramines, the Kind UV System uses UV light to sterilize microorganisms that chemicals can’t, offering a more complete level of protection.

Peace of Mind from Boil Water Notices

Ideal for added peace of mind during boil water alerts, which often result from E. coli detection or pressure drops in municipal systems that can allow pathogens to enter the water supply.

The Benefits of Whole House Water Filtration and Salt-Based Softening with UV

Pure Water You Can Trust
- No chlorine or contaminants
- Removes hardness minerals
- Better than bottle water quality from every tap
Soft Hair & Clear Skin
- Reduces soap scum and buildup
- No more dry skin or brittle hair
- Better results with less shampoo, soap, and detergent
Protects Every Appliance
- Prevents hard water scale in pipes, heaters, dishwashers
- Extends appliance lifespan
- Improves water heater efficiency
Spot-Free Shine
- Remove hard minerals at the source
- Prevent mineral build-up on surfaces
- Improve rinsing and drying

1 4

60″H x 48″W x 15″D – Includes UV System

Max Flow Rate

Up to 12 GPM (Gallons Per Minute).
Run up to 5 showers and appliances (such as dishwashers or washers) concurrently with no noticeable drop in water pressure.

Certification

NSF/ANSI - 42 (Chlorine, Taste, and Odor Reduction).
NSF/ ANSI - 61 (Drinking Water Safety),  372 (Lead Free) Certifications.
NSF/ANSI - 55 (Disinfection Performance and  Microbial Safety).

Home Size

For homes up to 5+ full bathrooms.
Works for 98% of US homes.

Hardness

Removes up to 99% of hardness minerals, including calcium and magnesium.

UV Rating

Powerful 50W quartz lamp.
Durable 316L stainless steel chamber.
Rated for pressures up to 150 psi.

Plumbing

1” NPT for system and UV connections.
The system integrates easily into most residential plumbing setups.
Bypass valves recommended.

UV Treatment System specifications

Filter + Softener Specifications

Operating Pressure: 25 to 120 psi

Operating Temp: 39 to 113 F

PH Range: 6.5 to 9.5

Max Iron: 0 mg/L

Max Hydrogen Sulfide: 0 mg/L

Max Manganese: 0 mg/L

Max Flow Rate: up to 15 GPM (Gallons Per Minute) @ 95% UVT

Connection Size: 1” MNPT

Operating Pressure: Max 150 psi

110V systems with North American NEMA 5-15, 3-wire plug

Lamp Power (Watts): 50

Power (Watts): 62

Chamber Material: 316L Stainless Steel, A249 Pressure Rated Tubing, Polished & Passivated

Operating Water Temperature: 2-40° C (36-104° F)

Clear Water Doesn’t Always Mean Clean Water. We Fix That.

Chemicals

Chlorine

Common in municipal water, causes taste and odor issues.

Organics

Glyphosate

A widely used herbicide (Roundup) and a major concern for rural and farming communities.

Chloramine

Used as a disinfectant, harder to remove than chlorine.

Atrazine

One of the most common pesticide contaminants in U.S. drinking water; linked to hormone disruption and reproductive issues.

Benzene

Known carcinogen; frequently in the news after industrial spills or contamination events.

See complete list of 155+ contaminants

System Manual

Kind Water Systems are designed for quick, no-hassle installation. Set it up yourself with basic tools or have your plumber of choice install it quickly.

Installation Manual

Detailed system installation manual with step by step instructions.

Download System Manual

Download UV Manual

Installation Video

Easy to follow guided instructions by our expert team.

Replacement Instructions

Changing the filters, UV lamp, and quartz sleeve is quick and easy. Just follow our step-by-step instructions. Most replacements take only minutes, with no technician required.

Maintenance Instructions

Quick and easy filter and lamp/sleeve replacement instructions

Filter Replacement Instructions

UV Lamp & Quartz Sleeve Replacement Instructions

Shop Replacement Filters

Shop Replacement Catalytic Carbon

Maintenance Video

Detailed video on how to replace your filters and UV lamp/sleeve

Kind Water vs. The Other Guys

Kind Water

Other Systems

Manufacturing

High quality materials - 120 day guarantee and lifetime warranty

Made in US

Made in China

UV Pathogen Protection:

Uses ultraviolet light to sterilize bacteria and viruses.

DIY-Friendly Install:

Designed for simple installation without professional help.

Easy Maintenance:

Minimal upkeep with quick filter changes.

Quick and Easy (10 mins DIY)

Requires a plumber

Certified Components:

Built with parts tested and certified for safety and performance.

NSF/ ANSI 42, 55, 61, 372

Chinese Components

Bottled Water Quality:

Better than bottled water from every tap. Fresh, clean, and great-tasting.

Overall rating: 5.0 / 5 from 1 reviews.

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Reviews

Lean and clean set up!

"Lean and clean set up!"

— Larry S. (5/5)

Q&A

FAQ

What is the warranty?

Our systems come with a limited lifetime warranty on the tanks, 10 Year Warranty on the UV and 7 Year Warranty on the Electronic Heads, as well as a 120-day satisfaction guarantee, This means you can return it for any reason if you are not 100% Satisfied.

Can I use this system on Septic?

Yes, the E-4000UV can be used with septic. The discharge from the backwashing carbon filter will not disrupt the probiotic bacteria colonies that break down waste in your septic system. There is some concern about the sodium in the salt-softener discharge, but modern efficient softeners do not use as much salt as previous era softeners. We have never received feedback from customers over damaged septic systems due to our salt-softener.

Can this system be installed outside?

Yes, the system can be installed outside as long as the electrical components are protected from the weather. Operating temperature outside has to be between 39°F and 113°F.

What is the maintenance on the system?

The sediment filter is designed to be replaced once a year.
The UV bulb and sleeve should also be replaced once a year for optimal performance.
The carbon media should be replaced every 600,000 gallons of water or 5 years, whichever one comes first.
The salt system media will last 15 - 20 years depending on water quality.

City Water Salt-Based Water Softener and Filter Combo with UV