See the purity, trust the technology. A tankless under-sink system that delivers ultra-pure, clean, refreshing water on demand for Big Pine Key families.
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. No bulky storage tank—so in Big Pine Key’s warm, humid climate, water is purified on demand.
First cartridge captures rust, dirt, sand, and larger particles—helpful for Keys homes on municipal water or cistern systems.
Carbon block media that reduces chlorine, odors, color and chemicals before the membrane—ideal for treated water in Monroe County.
The heart of the system—rejecting dissolved solids and heavy metals, and sending the concentrate to the drain.
The final cartridge polishes the water and adds beneficial minerals back for a balanced pH—nice for moderate-hardness water.
Filtration Stages
Each stage handles what the one before it leaves behind—ideal for Keys homes on treated municipal water or cistern/RO setups. UV is step four, and it’s not filtration at all; it targets what filters can’t catch.
Removes rust, dirt, sand, and large particles—great for Keys water setups.
Reduces chlorine, odors, color and chemicals from your Big Pine Key water.
Removes up to 99% of dissolved solids, heavy metals, and more—cleaner water for Big Pine Key.
Kills 99.99% of bacteria, viruses, and microorganisms.
Adds beneficial minerals for a balanced, healthy pH—great for Big Pine Key drinking water.
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 Big Pine Key.
Pricing
The systems are identical—the difference is how many we install on the same visit in Big Pine Key. Every unit includes UV sterilization and professional installation.
1 UnitInstalled
Regularly $2,000 - you save $1,005
The standard install, and the right fit for a kitchen sink in most Big Pine Key homes.
2 UnitsInstalled
A lower price per unit on a two-system install in Big Pine Key.
Ideal for a kitchen + wet bar, a second kitchen, or a guest suite in Big Pine Key.
3 or MoreInstalled
Our lowest per-unit price in Big Pine Key
For larger Big Pine Key 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 your Big Pine 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 for Big Pine Key homes.
Typically 95% and up to 99.99%, bringing 200–500 PPM tap water to near 0 PPM, or below 25 PPM—results vary in Monroe County homes.
The lamp operates automatically based on water flow pressure, and can be adjusted—simple and reliable for Keys living.
Keeps water fresh, saves under-sink space, and helps prevent secondary contamination—especially helpful in warm, humid Big Pine Key.
One gallon of wastewater for every 1.5 gallons of purified water produced.
A complete set of cartridges is roughly the equivalent of 8,000 bottles of water—great for life in the Florida Keys.
One Unit, Installed
$995
Installed
Regularly

Unit, all four cartridges, faucet, fittings & all parts—ready for Big Pine Key installs.

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

Fitted under your sink and professionally commissioned in Big Pine Key.

We test your Big Pine Key water before and after, so you can see the difference.

No surprises—one low price includes everything for Big Pine Key.

Lower per-unit pricing when we install two or more—great for Big Pine Key homes with multiple sinks.
Independent Testing
You don’t have to take performance on faith. This system has been independently tested against the recognized standard for reverse osmosis drinking water systems—great peace of mind for Big Pine Key.
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—municipal water or cistern/RO setups are both common in the Keys. We test your water during the visit so you know what you’re starting from.
Perfect For
Point-of-use installation means the water you drink and cook with in Big Pine Key is the water that gets purified.
Cleaner Water. Better Living. In Big Pine Key.
Installed by a Florida plumbing company that knows the Florida Keys—and stands behind the work.
Built with premium materials for reliable, long-term performance in coastal Keys conditions.
The built-in UV lamp is included in the price on every unit we install in Big Pine Key.
We stand behind our products and the quality of our work in Big Pine Key.
Join Big Pine Key homeowners who count on Mr. Pure Water for better-tasting water.
Product Assurances
Better-tasting, odor-free water for drinking, cooking, and everyday use in Big Pine Key.
Tankless purification as you draw—no storage tank and no waiting, even in warm, humid Keys weather.
The built-in UV lamp helps eliminate bacteria, viruses, and microorganisms—extra peace of mind in the Florida 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 Big Pine Key homes on municipal water or cistern/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 Big Pine Key
$995
Installed
Regularly