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Improve your home's water quality with the NU Aqua Whole House Salt Free Water Softener With Total Filtration. This powerful 4-stage system not only removes heavy metals, contaminants, and unpleasant odors but also acts as a salt-free water softener—helping to reduce scale buildup and extend the life of your plumbing and appliances. From the kitchen to the shower, enjoy cleaner, softer water throughout your entire home or business.
Whether you're enhancing your home’s water system or equipping a commercial property, this professional-grade solution is built to meet the demands of any space—homes, apartments, restaurants, offices, and beyond. Each high-capacity 20” filter cartridge delivers powerful, long-lasting filtration with high flow rates, providing thousands of gallons of clean water with minimal upkeep.
Stage 1 – Sediment Filter
This initial stage targets larger particles such as dirt, rust, sand, and insect debris. By capturing these contaminants early, it helps prevent clogs and damage to your plumbing and appliances while improving the efficiency and lifespan of the filters that follow.
Stage 2 – Heavy Metal KDF Granular Activated Carbon (GAC) Filter
This is where the real purification begins. Using premium carbon media, this stage adsorbs a broad spectrum of heavy metals and chemical contaminants—including chlorine, pesticides, VOCs, industrial solvents, lead, mercury, benzene, and more. It acts as a powerful barrier against many of the most common pollutants found in household water.
Stage 3 – SoftGuard Water Softener
This filter uses a salt-free conditioning process to reduce scale buildup caused by calcium and magnesium—without adding sodium to your water. Unlike traditional softeners, it doesn't require salt, electricity, or backflushing, making it low-maintenance and ideal for extending the life of plumbing, appliances, and fixtures.
Stage 4 – Carbon Block Filter
The finishing touch. This 5-micron carbon block filter eliminates remaining tastes, odors, and discoloration caused by chlorine, chloramine, sulfur (responsible for the rotten egg smell), and trihalomethanes—harmful byproducts of water disinfection. The result is clear, fresh-smelling water that looks and feels clean.
Built with industrial-grade materials, the NU Aqua Whole House Water Softener System is equipped with rugged filter housings, sturdy mounting brackets, and dependable, leak-resistant fittings. The large 20” filter cartridges support high flow rates—up to 15 gallons per minute (GPM)—making it a powerful solution for both spacious homes and commercial spaces.
When it's time for a filter replacement, the process is simple and straightforward. Just remove the housing, swap in a new cartridge, and keep your system running smoothly—no complex tools or procedures required.
Installation Manual here
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Which system is right for your home?
| NU Aqua Salt-Free | Salt-Based | |
|---|---|---|
| Salt required | ✓ None | ~50 lbs/month |
| Water wasted | ✓ Zero | 25–150 gal/week |
| Electricity needed | ✓ None | Yes |
| Removes scale | ✓ Yes | ✓ Yes |
| Filters chlorine & VOCs | ✓ Yes (4 stages) | ✗ No |
| Sodium added to water | ✓ None | ✗ Yes |
| Maintenance | Filter swap every 6–12 mo |
Weekly salt refills + annual service |
| Annual running cost | ~$224/yr | $400–$700/yr |
"Never hauling salt bags again. Installed in under 2 hours, water pressure is better than ever, and my faucets stopped getting crusty."— Mike T., verified buyer · Phoenix, AZ
5-year total cost of ownership (including system purchase)
Ready to make the switch?
Free shipping · 120-day guarantee · Lifetime warranty with subscription
NU Aqua System's SoftGuard Water Softener turns calcium and magnesium particles into crystals that get rid of limescale buildup in pipes and faucets.
Salt-based softeners waste hundreds of gallons of water and use tons of power. NU Aqua System's Salt-Free softeners produce no waste water and use 0 electricity.
While salt-based softeners only use 1-3 stages of filtration, NU Aqua salt-free softeners use 4 stages of filtration for clean, healthy, mineral-rich water without bad taste.
Hit "Play" to watch how this system filtration and softens your water!
"Replaced our salt softener 6 months ago. Water quality is noticeably better, my skin stopped being dry, and I haven't touched a salt bag since."— Sandra K., verified buyer · Scottsdale, AZ
From showers to laundry to your favorite recipes, NU Aqua Salt Free Water Softener Whole House systems softens hard water while getting rid of heavy metal, and chemical contaminants throughout your entire house.
Filter your water for delicious, healthy, odor-free drinking water with vital minerals on demand out of every faucet.
From your favorite dishes to coffee and drinks, NU Aqua Systems softens and gets rid of contaminants in your water, bringing out delicious flavors.
Soft water helps clear away and prevent scaling, which keeps appliances like refrigerators, coffee makers and more running safely for years.
The soft water that comes from this system lets you enjoy odorless, contaminant-free showers and baths that leave your skin and hair healthier than ever.
This system produces the soft, filtered water you need for cleaner clothes, richer colors, and less damage to your clothes.
Soft, heavy metal and chemical-free water helps your home's plumbing stay safe from scaling, clogs and damage caused by contaminated water.
Most municipal water contains dozens of contaminants that slip past basic treatment — damaging your home silently, every day.
Everything you need to know before you buy.
Yes — but it works differently. Traditional salt-based softeners remove hardness minerals by replacing them with sodium. Salt-free systems condition those minerals so they can't stick to pipes, appliances, or fixtures. You get the same scale prevention and appliance protection, without the sodium, wasted water, or 50 lbs of salt every month.
The practical result: no more crusty faucets, no more white buildup on showerheads, and your water heater runs at full efficiency.
The system is designed for water hardness up to 25 GPG (grains per gallon), which covers the vast majority of U.S. homes — including hard-water cities like Phoenix, Las Vegas, Dallas, and Denver. Not sure about your water? Your local utility publishes a water quality report online, or you can use a simple test strip.
Most customers install it themselves in under 2 hours with basic hand tools. The system connects directly to your main water line using standard fittings — no electricity, no drain line, no brine tank needed. Step-by-step instructions and a video guide are included.
If you're not comfortable working with plumbing, any local plumber can do it in under an hour.
Every 6–12 months, depending on your household size and local water quality. The subscription ships replacement filters automatically so you never have to remember — and you save 10% on every order. Filter swaps take about 5 minutes and require no tools.
Stage 1 — Sediment filter: removes dirt, rust, and particulates
Stage 2 — KDF/GAC filter: reduces chlorine, chloramines, heavy metals, and VOCs
Stage 3 — Salt-free conditioner: neutralizes hardness minerals to prevent scale
Stage 4 — Carbon post-filter: polishes taste and removes any remaining odors
Salt-based softeners only address hardness — they do nothing for chlorine, VOCs, or sediment.
No. The system causes less than a 1 PSI pressure drop under normal flow conditions. Many customers actually notice better pressure over time as scale buildup clears from existing pipes and fixtures.
Nothing is added. Unlike salt-based systems that exchange calcium and magnesium for sodium, the NU Aqua salt-free conditioner changes the form of the minerals — not the water chemistry. Safe for low-sodium diets, plants, and pets.
Yes — the 4-stage system addresses hardness and reduces sediment, chloramines, and VOCs commonly found in well water. However, well water quality varies significantly by location and may contain contaminants not addressed by standard filtration alone.
For well water applications, we recommend pairing this system with our 5-Stage Salt-Free Softener + UV System for more comprehensive whole-home coverage. A water quality test is the best way to understand what's in your water and choose the right system for your home.
The system includes a lifetime warranty for customers on an active filter subscription, plus a 120-day money-back guarantee. If you're not satisfied for any reason within 120 days, we'll arrange a full refund and free return shipping.
The subscription ships a complete set of replacement filters every 6 months at 10% off the standard price, with free shipping. You can pause, skip, or cancel anytime — no contracts or hidden fees. Active subscribers also unlock the lifetime warranty on the system.
