Dual-Tank Well Water Treatment System

Kind Water Co installs dual-tank well water treatment systems across Eastern Iowa for $3,450, or $3,800 with a tank reverse osmosis unit at the kitchen sink. Dual-tank means two tanks doing two different jobs: a chemical-free air-injection iron tank first, then a softener, so iron is oxidized and filtered out before the water ever reaches the resin.

Why well water gets two tanks

Two tanks, two jobs. The first is an iron filter with no chemical feed: a downflow valve draws in air, the air oxidizes dissolved iron into solid rust, and a bed of Katalox Light and catalytic carbon traps it and takes care of taste and odor on the way through. The second is the softener, which now only has to handle hardness instead of hardness plus iron, and that is what makes the resin last. Nothing is dosed into the water. There is no chlorine feed and no chemical tank, and the only thing you ever refill is the salt.

That matters more on a well than in town. Some Eastern Iowa utilities soften at the plant and some do not; a private well has nothing upstream at all. Iowa State University Extension estimates roughly 230,000 Iowans get their water from private wells. Our well water treatment page covers how the stages layer.

Where the $3,450 starts and stops

Every price we publish is all-in: equipment, installation by a licensed local plumbing professional we vet, schedule, and stand behind, tax, and the warranty are already inside the number. What it does not cover is anything your test says you need on top of it, and those items are priced separately below.

Plainly: this is an iron, softening and filtration build for wells with light-to-moderate iron. It is not disinfection and it is not the drinking-water stage — those are separate items, decided by a test.

Why a well gets a tank RO and never a tankless one

Wells run high total dissolved solids, and a tankless unit makes water on demand rather than storing any, so it gives up pressure at the faucet on high-TDS water. A tank unit fills a small reservoir under the sink and delivers from that. Tankless reverse osmosis is a city-water product, full stop.

A tank unit is $800 on its own, or bundled into the $3,800 build. Our systems are certified to the NSF/ANSI standards. NSF/ANSI 58 is the reverse osmosis standard and requires at least 75% total dissolved solids reduction to certify, and NSF/ANSI 44 is the softener standard.

Iowa State University Extension notes that nitrate is odorless and tasteless, and that reverse osmosis, distillation and anion exchange remove it. The CDC is clear that boiling does not remove chemical contaminants, and with nitrate concentrates it. More in our reverse osmosis and Iowa nitrate pages.

Who this build suits, and who should buy less

It suits a private well with real hardness and light-to-moderate iron — the orange tint in the toilet tank, the ring in the tub — which describes most of the Eastern Iowa wells we test. Plenty of wells need less than this, and some need more.

• No iron in the test? Then you do not need the iron tank. A well with hardness alone gets our standard softener build — $2,500, or $2,850 with reverse osmosis — and we will say so at the test rather than sell you the second tank.
• On city water? This is not your system. Start with water softeners or the numbers in our water filtration cost guide.
• Heavy orange staining, black streaks, or a rotten-egg smell? That is heavier iron, manganese or sulfur, and it moves to a dedicated iron and sulfur build, quoted separately after testing.
• Bacteria on your mind? That is a testing question before an equipment question. The Iowa DNR recommends testing a private well every year for coliform bacteria and nitrate — start with testing for bacteria.

What can push the price above the floor

Treat $3,450 and $3,800 as floors, not ceilings, because well properties add work a town lot does not. Trenching adds cost. Rock is $175. Burying the system runs $400 to $1,000. An attic tie-in is $250. Travel is free for the first 50 miles from Marion, then $1 per mile. Military and first responders take $100 off, and 0% financing is available. Our price does not expire, and we publish it — the national dealer networks publish none.

Iron and sulfur are quoted after the test, never before

We publish no dollar figure for iron and sulfur builds, because the honest number depends on what your well is doing. Penn State Extension guidance is that a softener alone is appropriate only when dissolved iron stays under about 5 mg/L. The EPA secondary standards for iron and manganese are aesthetic guidelines, not enforceable health limits: 0.3 mg/L and 0.05 mg/L. Our free in-home test covers hardness, iron and TDS, and the Iowa Private Well Grants program pays for county lab testing.

Warranty, install day, and what upkeep costs

Lifetime parts, five years on media, one year on labor, and we are insured and bonded. The plumber sets the two tanks, ties into the main line, sets the bypass, and walks you through the settings. After that the softener wants salt and little else, and the iron tank backwashes itself on a schedule with nothing to refill.

Annual service for a tank-RO home is $199 a year and includes all three RO filters, a water test, and a full system check. A diagnostic call for an unknown issue is $199, waived the first year on our own installs. A known issue is a $99 trip charge plus the part. A UV bulb, if you have one, is $300 every six to twelve months. Media is spent around seven to twelve years; a tank swap then is $1,000.

Start with a test at the wellhead

Kind Water Co is family-owned, founded in 2021 by Ryan Brunton, based in Marion, Iowa. Call 319-319-6566, email ryan@kindwaterco.com, or start an instant quote. We test your water, tell you which build fits, and say plainly if you need less than you thought.