City Water Salt-Based Water Softener and Filter Combo

Model Number: E-4000

Enjoy softer, cleaner water throughout your home with the Kind Water E-4000 - our premium whole-house filtration and smart-metered salt-based softening system for City Water. Minimize scale, protect your plumbing, appliances and eliminate unsightly hard water spots and scale. With whole-house filtration to reduce sediment, chlorine, pesticides, and chemical contaminants, the E-4000 provides fresher, better-tasting water and a noticeably improved shower, laundry, skin, and hair experience — all with efficient, low-maintenance performance.

Want added protection against bacteria and viruses? Consider the Kind E-4000UV, which includes all these benefits plus powerful UV disinfection.

intervals 6 12

Add ons:

Add UV Purification System

Sterilizes 99.9% of bacteria and viruses

~~$1,298.00~~

$899.99

120 Day Satisfaction Guaranteed

Same Day Shipping

Lifetime Warranty

View full details

How It Works: 3 Stages of Protection

3 Stages of Protection

The E-4000 Whole House Filter and Salt-Based Water Softener Combo 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

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 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

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.

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

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 50″W X 16″D

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.

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.

Plumbing

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

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

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 Manual

Installation Video

Easy to follow guided instructions by our expert team.

Replacement Instructions

Changing filters is quick and tool-free. Just twist off the housing, swap the cartridge, and twist it back on, done in minutes. No need for a technician.

Maintenance Instructions

Quick and easy filter replacement instructions

Filter Replacement Instructions

Shop Replacement Filters

Shop Replacement Catalytic Carbon

Maintenance Video

Detailed video on how to replace your filters

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

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, 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 11 reviews.

AI Generated Review Summary

Summary topics

Review topics: [].

Review highlights

Reviews

Great system

"So far, this has done a great job filtering and softening our water. We aren’t seeing water spots or grime on the toilets. We’re very happy with this purchase."

— Eric M. (5/5)

The shipping was fine, I’ll

"The shipping was fine, I’ll let you know when installed and using it! Thx"

— Mike L. (5/5)

Everything is working well.

"Everything is working well."

— Tami M. (5/5)

E-4000

"The product is great; however, the installation instructions are a bit challenging for the homeowner."

— Carl S. (5/5)

Perfect for us!

"We had this delivered and it arrived in a timely manner. It was easy to install and they were AWESOME on the phone to make sure it was hooked up and running as it should!!"

— Charles H. (5/5)

Satisfied customer

"Outstanding service and products. Easy to install. So far it’s working great. Love the App and the associated info on the system. Great job!"

— Donald Y. (5/5)

Soft Water

"Excellent customer service, before, during, and after the purchase. Tech support was superb. Equipment was easy to install. Instructions were excellent. My purchase included an RO system that was even easier to install. Great job by all involved."

— William S. (5/5)

E-4000

"Everything is working as advertised."

— Thomas O. (5/5)

Nice system

"It's tall and awkward but very functional. The app makes it easy to monitor settings, backwash cycles and salt levels (woohoo) but the best part is a huge difference in how the water is treated compared to my older pelican system. Water in Las Vegas has a gpg of 19 so it is very hard, my saltless system conditioned the water but did not soften it. The sinks, faucet aerator and everything water dried was a mess. This unit retains the conditioning, and adds softening so we have a much better tasting, and cleaner water for all uses."

— Daniel W. (5/5)

Awesome system

"Great system and Mario in support was a life saver when going through the start up process."

— Jess B. (5/5)

Q&A

FAQ

What is the warranty?

Our systems come with a limited lifetime warranty on the tanks 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-4000 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 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.

15% OFF All Systems

Summer Home Improvement Sale

City Water Salt-Based Water Softener and Filter Combo