Dual tank water softener system: our best soft water for bigger homes
Two tanks, more media, longer life. $3,500 installed.
Two dedicated tanks, one softening and one carbon filtering, with about 3.0 cu ft of media for longer media life and the capacity larger households need. Plus 7-stage reverse osmosis with remineralization. [Confirm: about 48,000 grain softener tank plus carbon tank.]
$3,500 installed
- $3,500 flat price
- Licensed install
- 30-day money-back guarantee
Want the answer for your home?
Tell us your ZIP code and a rep calls you within 5 minutes to answer every question. No pressure, no sales visit.
You're probably on this page because:
- Your household is big and the softener can't keep up
- You're in a chloramine city and still taste it
- You want your system to last as long as possible
Two tanks do two jobs better than one.
Chloramine, by the numbers
- 8 of the 14 cities we serve use chloramine, which is harder to filter than chlorine.
- Over 40% of people think their water affects their skin and hair.
Sources: utility reports; Leaf Home survey.
Two tanks last longer than one
One tank softens. One tank filters. Each gets its own full load of media.
That means longer life and no slowdown on busy days.
What you get
| Part | What it fixes |
|---|---|
| Softener tank [about 48,000 grain] | Hard water, even very hard |
| Carbon tank [about 1.5 cu ft] | Chlorine taste and smell |
| Reverse osmosis + remineralization | Pure, great-tasting drinking water |
Made for big households
- 5+ people [confirm]
- Very hard city water
- Anyone who wants our best
One flat price. No surprises.
Standard install: hooked up at your main water line, near a drain and outlet, plus RO under your kitchen sink.
Extra work? Long pipe runs or trenching get quoted before you book. Never at install.
Don't ask if it pays for itself. Ask how many times.
Soft water protects your water heater, cuts soap costs and saves your appliances. Every year.
Savings in year one, and every year after
$414
- 10-year total
- $4,136
- Pays for the City Water System
- 1.4 times over 10 years
- Water heater energy
- $130
- Detergent and cleaning
- $144
- Appliances and fixtures
- $140
- Bottled water (with RO)
- $0
An estimate, not a guarantee. Your numbers depend on your water, your home and your habits. Enter your ZIP code to use your local hardness; until then it assumes 10 grains.
Sources: Water heater efficiency: WQRF and Battelle (gas tank heaters lost up to 48% efficiency on hard water; the calculator uses a conservative middle value). Detergent: WQRF laundry and dishwasher studies (about 30% less at 10 gpg, nearly 70% less at 25 gpg). Fixtures: Battelle (low-flow shower heads clogged in about 18 months on hard water). Appliance figures are our own conservative estimate until customer data replaces them.
Every system comes with
- Licensed local plumber install
- Before-and-after water test
- 30-day money-back guarantee on the system
- Warranty: [product terms] + 1 year on labor
- Filter subscription option: new filters every 6 months
Specs
- Softening
- Dedicated softener tank
- Filtration
- Dedicated carbon tank
- Drinking water
- 7-stage reverse osmosis with remineralization
- Warranty
- Product terms to confirm, plus 1 year on labor
Schedule a Call
Life with it vs. without
| Without it | With it |
|---|---|
| Carbon and resin sharing one tank | Each tank doing its own job |
| Media wearing out early | Longer-lasting media |
How we work, start to finish
- 1
You reach out or book online
- 2
A rep calls you, usually within 5 minutes, to confirm your system and answer questions
- 3
We schedule a licensed local plumber, usually within a week
- 4
Install day: a few hours, plus a before-and-after water test
- 5
After that: new filters every 6 months if you subscribe
Our take
One tank or two: the honest difference
The question we get asked most about this, after [thousands] of installs:
Combo systems put the carbon and the softener resin in one tank. That saves space and money, and for moderate water it works. But it's a compromise.
Carbon and resin need different backwash flows to clean themselves. In one tank, the system has to pick a setting that's not ideal for either one. The carbon also has to share space, so there's less of it, and in chloramine cities that matters.
With two dedicated tanks:
Each tank cleans itself the right way. There's more carbon, so it handles chloramine better and lasts longer. You replace each one separately. When the carbon is spent years from now, you replace the carbon, not the whole system.
That's why we call it our best city water system. If you're a smaller household on moderately hard water, the City Water System is plenty. If you're a bigger household, in a chloramine city, or you want the system to last as long as possible, the extra $550 goes into real performance, not a fancier label.
The system we'd put in our own homes
After 20+ years and [thousands] of installs, this is what we recommend when someone asks for the best.
- 20+ years in water
- Our own patents
- We supply other water companies
- [Thousands] of systems sold
- Licensed installers
Related Pages
Questions people ask
What's the difference between the City Water System and the Premium Dual-Tank?
Both soften, filter and include reverse osmosis. The Dual-Tank gives softening and carbon their own tanks with more media, so it lasts longer and keeps up with bigger households.
Is a dual-tank the same as a twin tank softener?
No. A twin tank has two softener tanks that take turns. Our dual-tank has one softener tank and one carbon tank.
How long does the carbon last?
[Confirm with partner.] A dedicated carbon tank with more media lasts noticeably longer than a shared tank.
Is the Dual-Tank worth the extra $550?
If you have a bigger household or very hard water, yes. Media lasts longer and the system keeps up on busy days. For most smaller homes, the City Water System is plenty.
Does it take more space?
It needs room for two tanks plus the salt tank, about [dimensions]. We confirm your space before you book.
Does it remove chloramine?
[Confirm carbon type.] Catalytic carbon handles chloramine best.
How long does installation take?
Usually a few hours, by a licensed local plumber.
What if I don't notice a difference?
30-day money-back guarantee on the system.