See the purity, trust the technology. A tankless under-sink system that delivers ultra-pure, clean, refreshing water on demand—perfect for Summerland Key families on FKAA water or rain/RO setups.
The System Itself
The whole system fits under your sink and connects with quick-connect fittings. Four quick-change twist cartridges handle the filtration stages, and a UV chamber sits inline between them. There’s no bulky storage tank—so in Summerland Key’s warm, humid conditions, water is purified on demand instead of sitting.
The first cartridge catches rust, dirt, sand, and larger particles before they travel through your Summerland Key plumbing.
Carbon block media that reduces chlorine, odors, color, and chemicals before the membrane—great for FKAA water in Summerland Key.
The heart of the system—rejecting dissolved solids and heavy metals and sending the concentrate to the drain (ideal for hard water).
The final cartridge polishes the water and adds beneficial minerals back for a balanced pH—great for everyday drinking in the Keys.
Filtration Stages
Each stage handles something the one before it left behind. UV is the fourth step in the sequence and the one stage that is not filtration at all - it is there to deal with what a filter cannot catch.
Removes rust, dirt, sand and large particles before they build up in your lines.
Reduces chlorine, odors, color, and chemicals common in municipal water.
Removes up to 99% of dissolved solids, heavy metals, and more—helpful for hard water and scaling concerns in the Keys.
Kills 99.99% of bacteria, viruses and microorganisms.
Adds beneficial minerals back for a balanced, healthy pH.
Four filtration stages plus UV sterilization. Steps 1 to 3 and 5 are the four filtration stages; step 4 is the built-in UV lamp for disinfection—included in the price on every system we install in Summerland Key.
Pricing
The systems are identical - the difference is how many you have installed on the same visit. Every unit includes UV sterilization and professional installation for Summerland Key homes.
1 UnitInstalled
Regularly $2,000 - you save $1,005
The standard install, and the right fit for a kitchen sink in most Summerland Key homes.
2 UnitsInstalled
A lower price per unit on a two-system install in Summerland Key.
Great for a kitchen and wet bar, a second kitchen, or a guest suite in Summerland Key.
3 or MoreInstalled
Our lowest per-unit price in Summerland Key
Great for larger Summerland Key homes, multi-unit properties, and light commercial spaces in the Keys.
All prices are installed and include UV sterilization, with no hidden fees. Not sure how many you need? We’ll walk your Summerland Key property with you during the visit.
Technical Specifications
The SimPure ROULP-3012-400-T1, from the T1-400 series. A tankless build that produces up to 400 gallons a day on demand, so the water is made when you draw it rather than stored.
400 GPD
Production rate
1.5:1
Pure-to-drain ratio
1,057 gal
Per full cartridge set
99.99%
Maximum TDS reduction
The T1-400 series tankless under-sink reverse osmosis system.
Typically 95% and up to 99.99%, bringing 200–500 PPM tap water to near 0 PPM, or below 25 PPM—results vary with Summerland Key source water.
The UV lamp operates automatically based on water flow pressure, and can be adjusted.
Keeps water fresh, saves under-sink space, and helps prevent secondary contamination—ideal for warm Florida Keys homes.
One gallon of wastewater for every 1.5 gallons of purified water produced.
One complete set of cartridges is roughly the equivalent of 8,000 bottles of water—less hauling and less plastic in the Keys.
One Unit, Installed
$995
Installed
Regularly

Unit, all four cartridges, faucet, fittings & all parts—everything for your Summerland Key install.

The built-in UV lamp is included—no add-on upgrade.

Fitted under your sink and commissioned by pros familiar with Florida Keys Aqueduct Authority water.

We test your water before and after—so you can see the difference in your Summerland Key home.

No surprises. One low price includes everything.

Lower per-unit pricing when we install two or more—great for homes with multiple sinks in Summerland Key.
Independent Testing
You do not have to take the performance on faith. The system has been tested by an independent laboratory against the recognised standard for reverse osmosis drinking water systems.
Testing covers the removal of over 99.99% of more than 1,000 contaminants, including total dissolved solids such as fluoride, nitrates and nitrites; PFAS, PFOA and PFOS; heavy metals such as lead and arsenic; and chloride.
Made by SimPure
SimPure is based in Seattle, Washington and has served the USA since 2006, with trained water specialists available for product support.
Reduction performance varies with source water and household usage. We test your water during the visit—whether you’re on FKAA municipal water or a rain/RO setup—so you know what you’re starting from.
Perfect For
Point-of-use installation means the water you drink and cook with in Summerland Key is the water that gets purified.
Cleaner Water. Better Living. In Summerland Key.
Installed by a Florida plumbing company that knows the Keys—done right, and we stand behind the work.
Built with premium materials for reliable performance in the Keys’ warm, marine air.
The built-in UV lamp is included in the price on every unit we install in Summerland Key.
We stand behind our products and the quality of our service in Summerland Key.
Join homeowners across Monroe County who choose Mr. Pure Water.
Product Assurances
Better-tasting, odor-free water for drinking, cooking, and everyday use in Summerland Key.
Tankless purification as you draw—no storage tank, no waiting, and less risk in hot, humid Keys weather.
The built-in UV lamp helps eliminate bacteria, viruses and microorganisms—extra peace of mind in the Keys.
The Mr. Pure Water Under-Sink Reverse Osmosis System with UV Sterilization is a tankless point-of-use system that fits neatly under your sink with quick-connect fittings—ideal for Summerland Key homes on Florida Keys Aqueduct Authority water and rain/RO setups. Cold water enters a PP sediment cartridge that catches rust, dirt, sand and large particles, then a CTO carbon block that takes out chlorine, odors, colors and chemicals. The reverse osmosis membrane removes up to 99% of dissolved solids and heavy metals, sending the concentrate to the drain at a 1.5:1 pure-to-drain ratio. A built-in UV lamp then kills 99.99% of bacteria, viruses and microorganisms - the one thing a filter cannot catch - operating automatically on water flow pressure. An alkaline and mineral stage finishes the water, putting beneficial minerals back for a balanced pH. Five stages in all - PP, CTO, RO, UV and alkaline - producing up to 400 gallons a day on demand, with no bulky storage tank to hold water, take up space or invite secondary contamination.
One Unit, Installed in Summerland Key
$995
Installed
Regularly