Echo RO — Tankless Reverse Osmosis System

The filtration half of the pair. A tankless four-stage reverse-osmosis system that fits under the sink — and the natural companion to the Echo Flow for anyone who does not already own an RO.

Who this is for

• Anyone buying an Echo Flow who does not already have reverse osmosis upstream
• Households replacing an aging tank-based RO with something tankless and more compact
• People who want the water clean before anything else happens to it

Who it's not for

• Anyone who needs it in hand right now — it is on backorder, expected at Echo's warehouse late 2026, see the availability notice above
• Households that already own a working RO
• Anyone wanting hydrogen from this unit — it filters, it does not infuse

By the numbers

• Four-stage filtration
• Tankless — no storage tank taking up cabinet space
• Reduces contaminants including chlorine, lead and fluoride
• Under-sink installation
• A secondary faucet is required for under-counter installation
• Free shipping within the continental US

Frequently asked questions

Do I need this if I'm buying the Echo Flow?

Only if you don't already have reverse osmosis. The Flow requires upstream filtration and provides none of its own, so it needs an RO in front of it — either this one or the one you already own.

Should I buy this and a Flow, or just the Echo One?

The One combines both in a single under-counter system and is worth comparing on price and cabinet space. Buying the RO and the Flow separately makes most sense when you want to stage the purchase or already have one half.

What does tankless change?

No storage tank, so it takes less cabinet room and there is no tank pressure to maintain over the years.

When will it ship?

It is on backorder with the manufacturer. Echo's estimate as of 26 October 2026 is that units arrive at their warehouse in late 2026 — that is Echo's estimate rather than a commitment, and we will confirm with them before taking your order.

Is the Echo RO NSF Certified?

No — and we would rather be precise about that than let a word do work it has not earned. The unit was independently tested against NSF/ANSI 58, the standard for reverse-osmosis drinking water systems, and it passed; we hold that report and will send it to you. What it is not is NSF Certified. The Echo RO does not appear in NSF's certification listings, and the report itself states that it does not represent NSF certification or authorisation to use the NSF mark. Echo confirmed both points to us in writing. Tested and passed is a real result you can read for yourself; certification is a separate, ongoing programme this unit has not been through. If you see the NSF mark used on this product anywhere, it is not something we put there.

From the founder

I list this because the Flow needs something in front of it, and it would be poor form to sell you a hydrogen unit without being clear about that. If you already have reverse osmosis, skip this page entirely. Echo has built hydrogen equipment since roughly 2009, they manufacture and service their own machines, and they answered every regulatory and warranty question I put to them without hedging. That is why the line is here.

Backed by

• Echo has manufactured hydrogen equipment since approximately 2009
• Independently tested to NSF/ANSI 58, the reverse-osmosis standard, and passed — third-party qualification report, trade designation 300G, November 2016. We hold the report and will send it to you on request. This is a test result, not an NSF certification — see the FAQ below.
• In-house technical team handles testing and repairs
• Free shipping within the continental US, absorbed by InfraCore