Reverse Osmosis Systems in Marion, IA

Two different machines solve two different problems in a Marion kitchen. An under-sink reverse osmosis system fixes the tap you drink from; a whole-home softener fixes everything else, because Marion runs 18 to 20 grains per gallon unsoftened, per The Gazette. Kind Water Co installs RO here for $800 tank, $900 tankless.

Which job are you actually trying to fix?

Almost every call from a Marion homeowner starts with a symptom, not a system. The coffee tastes off. Glasses come out of the dishwasher cloudy. The shower door builds a film two days after it was scrubbed. Those are not the same complaint, and they do not have the same answer.

A softener is plumbed where water enters the house, so it handles the mineral load before anything reaches the water heater, the dishwasher, or the showers. Reverse osmosis is plumbed under one sink and serves one dedicated faucet, pushing water through a membrane fine enough to hold back dissolved solids. Neither is a smaller version of the other. Here is the split.

Read the first two columns and you can usually tell within a minute which machine you came here for. If both describe your house — common in Marion — the two go in together.

The expensive mistake this town makes most often

Buying the wrong one first is the costliest thing that happens here, and it goes both directions.

Someone with white crust on the faucets and stiff towels buys an $800 RO, loves the drinking water, and still has every original complaint, because the RO was never plumbed to the shower. Someone else has fine appliances and one real problem — the water does not taste good — and gets talked into a whole-home system when the $800 faucet was the entire answer. We would rather you spend the smaller number and be finished.

The quieter version is assuming the two are alternatives when they are cheapest together. On its own an RO is $800. Added to a softener and whole-home filtration package at the same visit, the total moves from $2,500 to $2,850 — $350, not $800, because the plumbing professional is already at your house. Regional figures are on our reverse osmosis cost page.

What 18 to 20 grains means for the tap you drink from

Marion does not soften municipally — The Gazette reported 18 to 20 grains per gallon in February 2023, and the city's own report publishes no hardness figure. The full hardness story is on our Marion water page. At the drinking tap, what matters is that an RO membrane here filters against the heaviest municipal mineral load anywhere we work.

Under NSF/ANSI 58, the standard governing residential reverse osmosis, a system has to reduce total dissolved solids by at least 75% to be certified. Our systems are certified to the NSF/ANSI standards. A membrane fed softened water is not fighting Marion's whole mineral load on every pot you fill, which is the practical argument for softener first if you were buying both anyway. On its own an RO still does the job here; it simply works a harder shift. The annual visit is what keeps it honest: $199 a year on a tank home, $249 on a tankless, covering all three filters, a water test, and a full system check.

One thing we routinely talk Marion homeowners out of: a $500 pre-sediment filter. Wells are its legitimate use. On city water the carbon stage self-backflushes, so it rarely earns its price here.

The RO hardware choice, once the softener question is settled

A tank system is $800 and stores treated water in a small pressurized tank about the size of a bread box, so the deciding factor is cabinet room. It is also the only reverse osmosis we put on a well, which matters if your address says Marion but your water comes from your own well.

A tankless system is $900. It frees the cabinet but needs a dedicated electrical outlet under the sink, and in a lot of Marion kitchens that outlet is switched or already claimed by the garbage disposal. A garbage-disposal air switch moves the disposal to a countertop button and frees the outlet for $300. We will be straight with you: that $300 is deliberately thin margin. It is not a money-maker for us, it is just what it costs to make the tankless install possible.

A line to the refrigerator or ice maker is $300 to $400, and we say the same two things first every time: it cannot be done if your sink sits in an island, and even when the fridge is close it is roughly a coin flip whether the run works out, with no way to predict it. We will try. We will not pretend it is a sure thing. A specialty or digital faucet is $200.

The softener, the RO, and what each one costs

Each price below includes the equipment, installation by licensed local plumbing professionals we vet, schedule, and stand behind, taxes, and our lifetime parts warranty — five years on media, one year on labor. We are insured and bonded.

• Tank RO on its own: $800
• Tankless RO on its own: $900
• Softener only, no carbon filtration: $1,900
• Softener plus whole-home filtration: $2,500, or $2,850 with RO added
• XL system for 8 or more residents or 4-plus bathrooms: $2,800, or $3,150 with RO
• Annual service: $199 a year on a tank home, $249 on a tankless

Later, a diagnostic call for an unknown issue is $199, waived the first year on anything we installed; a known issue is a $99 trip charge plus the part. Military and first responders take $100 off, and 0% financing is available. Marion is home base, so the first 50 miles are free, then $1 a mile. We publish all of this because the national brands generally do not.

How install day actually goes

An under-sink RO is a morning, not a project. The licensed plumbing professional we schedule taps the cold line, mounts the unit and — on a tank system — the storage tank in the cabinet, drills for a dedicated faucet at the sink deck if there is no spare hole from an old soap dispenser, and ties in the drain line. It is flushed before anyone leaves, and you are shown which filter is which so the annual visit makes sense. More sits on our reverse osmosis and water softeners pages.

Have us test your own sink first, free

The fastest way to settle which machine you need is to stop guessing. We come to your kitchen, test the water, and say what it shows — including when the answer is that you need less than you expected. Call or text 319-319-6566, email ryan@kindwaterco.com, or get a number in about a minute from our instant quote. Kind Water Co is family-owned, founded in 2021 by Ryan Brunton, and headquartered in Marion, so this is our tap water too. One last local note: Marion disinfects with plain chlorine, so ordinary activated carbon handles the taste and you can skip the $150 to $300 catalytic carbon upgrade that chloraminated Cedar Rapids needs — more on that in why tap water tastes like chlorine.

Towns next door

• Cedar Rapids — lime-softened at the plant and chloraminated, a different combination entirely
• Hiawatha — 14 to 20 gpg in the 2025 report, plain chlorine, with an iron-removal plant
• Linn County — including homes on private wells