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How to Pay for a Tankless Reverse Osmosis System

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How to Pay for a Tankless Reverse Osmosis System

Get clean drinking water on tap without cluttering your under-sink cabinet or blowing your monthly budget.

VoAtlas editorial Updated · 3 min read
Typical cost $400 before anything else
Across the 0% window $22.22/mo 18 months, no interest

How we got that: $400 spread evenly across the 18-month introductory window on the Citi Simplicity® Credit Card. Checked · at the bank Carry a balance past the window and the standard APR applies to what is left.

Say goodbye to bulky water pitchers and heavy plastic bottles. A tankless reverse osmosis system sits neatly under your kitchen sink, taking up half the space of old-school systems, and filters your tap water instantly. Installing it takes about two hours if you do it yourself, or a quick visit from a local plumber. The best time to buy is during home improvement holiday sales like Memorial Day, when major retailers slash prices on kitchen fixtures.

If you want to hire a pro for the installation, always get at least two or three quick quotes from local plumbers instead of hiring the first one you call. To handle the $400 cost of the system itself without taking a one-time cash hit, we can split the price over time. Using a card like the Citi Simplicity® Credit Card lets you spread the payments out completely interest-free.

Keep in mind that the 18-month 0% interest window is a hard deadline, not free money. If you still have a balance left on the card when those 18 months are up, the regular variable APR will kick in on the remaining amount, which will quickly erase whatever holiday discount you snagged.

The steps

  1. 01

    Buy during Memorial Day sales

    Plan your purchase around late May or similar home improvement holiday weekends. Retailers regularly discount water filtration systems by 10% to 20% during these sales. Keep the system in your online cart a week early so you can watch for the price drop.

  2. 02

    Compare local plumbing rates

    If you are not comfortable splicing into your cold water line, you will need a plumber. Call at least three local tradespeople for a quick quote on a standard under-sink filter install. Let them know you already have the unit to keep the labor price transparent.

  3. 03

    Use the right payment window

    The Citi Simplicity® Credit Card offers 0% for 18 months on purchases and balance transfers from date of account opening. By putting the $400 purchase on this card, you buy yourself a year and a half to pay it off. Just make sure you do not add extra balance you cannot cover.

  4. 04

    Set up your autopay

    Divide the $400 cost by the 18-month window, which comes out to exactly $22.22 per month. Set up automatic payments for this amount immediately. This guarantees the balance drops to zero before the interest period ends.

  5. 05

    Clear out the cabinet

    Before the box arrives, empty the cabinet under your kitchen sink and wipe it down. Check your shutoff valves to make sure they actually turn off and do not leak. Doing this ahead of time saves you or your plumber valuable time on installation day.

  6. 06

    Check the card terms before you commit

    Every figure we publish for the Citi Simplicity® Credit Card carries the date a person verified it against Citi and a link to where they checked. Intro windows and APRs change without notice, so confirm the current terms before applying.

    See Citi Simplicity® Credit Card terms →

Common questions

Do tankless systems waste less water than tank systems?

Yes. Tankless reverse osmosis systems are much more efficient, wasting up to 70% less water than traditional systems with storage tanks. They only filter water as you need it.

Can I install a reverse osmosis system myself?

If you have basic tools and are comfortable drilling a small hole in your countertop for the faucet, you can do it in an afternoon. Otherwise, hire a plumber to avoid leaks.

How often do the filters need to be changed?

Most tankless systems use twist-and-pull filters that you change once a year. It takes about thirty seconds and requires no tools.

Does reverse osmosis remove healthy minerals?

Yes, it removes almost everything from the water. If you want those minerals back, look for a system that includes a remineralization stage before the water hits your tap.