Twin tank water softener: soft water 24/7, no gaps
Two tanks take turns, so you never run out.
Two tanks take turns, so you always have soft water, even while one tank recharges. Made for large homes, big families and very hard water.
- Licensed install
- Before-and-after test
- 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:
- Someone gets hard water showering at 2 a.m.
- Someone in your home uses water at all hours
Two tanks, no gaps.
Hard water, by the numbers
- About 156 pounds of rock a year: what a family of 4 runs through its pipes at 10 grains of hardness. About 250 pounds in very hard water.
- Up to 48% less efficient: gas water heaters on hard water in testing.
- 1 in 3 homeowners replaced appliances or fixtures because of buildup.
Sources: 300 gal/day × grains × 64.8 mg × 365; WQRF and Battelle; Morton Salt survey via the Philadelphia Inquirer.
Is this your size?
- 6+ people
- Extremely hard water
- Water use at all hours
Why this size works
One tank softens while the other recharges. Always soft water.
Want it all done? Get a complete system
Twin tank systems start at [$3,999] installed, built for large households and very hard water. [Confirm price with owner.]
See systems and prices Get my price
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 install 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
Part of the Dual Tank Water Softener System
$3,500 installed, with everything it takes to put it in.
Schedule a Call
Life with it vs. without
| Without it | With it |
|---|---|
| Hard water during recharge | Soft water 24/7 |
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
Twin tank vs one big tank
We build our systems with our own manufacturers, some with our own patents, and we've supplied softeners to other water companies for years. Here's what that's taught us.
A single-tank softener has to go offline to recharge, usually at 2 a.m. If someone's showering then, they get hard water for a while. For most homes, that's no problem. For some, it is.
A twin tank fixes that. One tank works while the other recharges, then they switch. That gives you:
Soft water 24 hours a day, for night shifts, big families and early risers. Recharging with already-soft water, which is better for the resin. Only recharging what's used up, which often saves salt.
The tradeoffs: it costs more, takes more space, and there are two resin tanks to maintain over the years. If your home is quiet at night and your water isn't extremely hard, a single big tank is usually the better value. We'll tell you which one fits.
Built with our own manufacturers
Not pulled off a shelf. 20+ years and [thousands] of installs taught us which parts last.
- 20+ years in water
- Our own patents
- We supply other water companies
- [Thousands] of systems sold
- Licensed installers
Related Pages
Questions people ask
What is a twin tank water softener?
Two softener tanks that take turns. One softens while the other recharges, so you always have soft water, even during regeneration.
Is a twin tank the same as your Premium Dual-Tank System?
No. A twin tank has two softener tanks. Our Premium Dual-Tank System has one softener tank and one carbon filter tank.
Is a twin tank softener worth it?
For large homes, very hard water, or homes that use water at all hours, yes. For most smaller homes, a single tank is plenty.
Does a twin tank use more salt?
Often less. It only recharges the tank that's used up, and it can recharge with already-softened water.
How much space does it need?
Room for two resin tanks and a salt tank, about [dimensions]. We confirm on the call.
Who should get a twin tank?
Big families, homes with night-shift schedules, and anyone who wants soft water 24/7 with no gaps.