See the purity, trust the technology. A tankless under-sink system that delivers ultra-pure, clean, refreshing water on demand—built for life in the Florida Keys’ warm, coastal climate.
The System Itself
The system fits neatly under your sink and connects with quick-connect fittings. Four quick-change twist cartridges handle the filtration stages, with a UV chamber inline. With no bulky tank, water is purified on demand—handy during hurricane-season outages in Monroe County.
The first cartridge—catches rust, dirt, sand, and larger particles before anything downstream sees them.
Carbon block media that reduces chlorine, odors, color, and chemicals before the membrane—great for Keys tap water.
The heart of the system—rejects dissolved solids and heavy metals and sends the concentrate to the drain.
The final cartridge polishes the water and adds beneficial minerals back for a balanced pH.
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, especially helpful when outages hit during hurricane season in the Florida Keys.
Removes rust, dirt, sand and large particles.
Reduces chlorine, odors, color, and chemicals.
Removes up to 99% of dissolved solids, heavy metals, and more.
Kills 99.99% of bacteria, viruses and microorganisms.
Adds beneficial minerals 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. It’s included in the price on every system we install in Key Colony Beach.
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 Key Colony Beach and across Monroe County.
1 UnitInstalled
Regularly $2,000 - you save $1,005
The standard install, and the right fit for a kitchen sink in most Key Colony Beach homes.
2 UnitsInstalled
A lower price per unit on a two-system install in Key Colony Beach.
Great for a Key Colony Beach kitchen and wet bar, a second kitchen, or a guest suite.
3 or MoreInstalled
Our lowest per-unit price
Ideal for larger Florida Keys homes, multi-unit properties, and light commercial spaces.
All prices are installed and include UV sterilization, with no hidden fees. Not sure how many you need? We’ll walk the Key Colony Beach 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 for Key Colony Beach homes.
Typically 95% and up to 99.99%, bringing 200–500 PPM tap water to near 0 PPM, or below 25 PPM.
The UV lamp runs automatically based on water flow pressure, and can be adjusted.
Keeps water fresh, saves under-sink space, and helps prevent secondary contamination.
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 plastic in the Florida Keys.
One Unit, Installed
$995
Installed
Regularly

Unit, all four cartridges, faucet, fittings & all parts—ready for Keys-style installs.

The built-in UV lamp is included—no add-ons or upgrades.

Fitted under your sink in Key Colony Beach and commissioned by pros.

We test your water before and after—so you can see the difference in Monroe County.

No surprises. One low price includes everything.

Lower per-unit pricing when we install two or more in your Key Colony Beach home.
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’ll test your water during the Key Colony Beach visit so you know exactly what you’re starting from.
Perfect For
Point-of-use purification—so the water you drink and cook with in Key Colony Beach is the water that gets treated.
Cleaner Water. Better Living in the Florida Keys.
Installed by a Florida plumbing company serving Monroe County—experienced work we stand behind.
Built with premium materials for reliable, long-term performance in coastal salt air.
The built-in UV lamp is included in the price on every unit we install in Key Colony Beach.
We stand behind our products and our Key Colony Beach service.
Join Key Colony Beach homeowners in Monroe County who choose Mr. Pure Water.
Product Assurances
Better-tasting, odor-free water for drinking, cooking, and everyday life in Key Colony Beach.
Tankless purification as you draw—no storage tank, no waiting, even during Keys busy seasons.
Built-in UV helps eliminate bacteria, viruses, and microorganisms—extra peace of mind in hurricane season.
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—great for Key Colony Beach homes where space matters. 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 Key Colony Beach
$995
Installed
Regularly