See the purity, trust the technology. A tankless under-sink system that delivers ultra-clean, refreshing water on demand—made for Middle River living in our humid subtropical climate.
The System Itself
The whole system fits under your sink and connects with quick-connect fittings. Four quick-change twist cartridges deliver the filtration stages, with a UV chamber inline. No bulky storage tank—just purified water on demand for Middle River kitchens.
The first cartridge catches rust, dirt, sand and large particles—helpful with Northeast Florida’s hard water.
Carbon block media that reduces chlorine, odors, colors, and chemicals before the membrane—great for Northeast Florida water.
The heart of the system, rejecting dissolved solids and heavy metals and sending the concentrate to the drain—ideal for hard water in Northeast Florida.
The final cartridge polishes the water and adds beneficial minerals back for a balanced pH—great for Middle River homes.
Filtration Stages
Each stage handles what the one before it leaves behind—helpful for St. Johns County homes dealing with hard water. UV is the fourth step and the one stage that is not filtration at all; it is there to handle what a filter cannot catch.
Removes rust, dirt, sand and large particles—great for hard-water areas.
Reduces chlorine, odors, colors, and chemicals in Middle River tap water.
Removes up to 99% of dissolved solids, heavy metals, and more—helpful with hard water common in Northeast Florida.
Kills 99.99% of bacteria, viruses and microorganisms.
Adds beneficial minerals back for a balanced, healthy pH—great for Middle River families.
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—not filtration—and it’s included in the price on every system we install in Middle River.
Pricing
The systems are identical—the difference is how many you have installed on the same visit in Middle River. 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 Middle River homes.
2 UnitsInstalled
A lower price per unit when you install two systems in Middle River.
Great for a kitchen and wet bar, a second kitchen, or a guest suite in Middle River.
3 or MoreInstalled
Our lowest per-unit price in Middle River
Ideal for larger St. Johns County 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 Middle River 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 Middle River homes.
Typically 95% and up to 99.99%, bringing 200–500 PPM tap water to near 0 PPM, or below 25 PPM—results vary by Middle River source water.
The lamp operates automatically based on water flow pressure, and can be adjusted to match your home’s needs.
Keeps water fresh, saves under-sink space, and helps prevent secondary contamination—perfect for busy Middle River kitchens.
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 waste for St. Johns County families.
One Unit, Installed
$995
Installed
Regularly

Unit, all four cartridges, faucet, fittings & all parts—everything for your Middle River install.

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

Installed under your sink and commissioned by local Middle River water pros.

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

No surprises for Middle River—one low price includes everything.

Lower per-unit pricing when we install two or more in the same Middle River home.
Independent Testing
You do not have to take 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 in Middle River so you know what you’re starting from.
Perfect For
Point-of-use filtration means the water you drink and cook with in Middle River is the water that gets purified.
Cleaner Water. Better Living in Middle River.
Installed by a Florida plumbing company that knows St. Johns County water—and stands behind the work.
Built with premium materials for reliable, long-term performance in Middle River’s humid subtropical climate.
The built-in UV lamp is included in the price on every unit we install in St. Johns County.
We stand behind our products and the quality of our service in Middle River.
Join homeowners in Middle River and St. Johns County who choose Mr. Pure Water.
Product Assurances
Better-tasting, odor-free water for drinking, cooking, and everyday use in Middle River.
Tankless purification as you draw—great for busy Middle River kitchens with no waiting or storage tank.
The built-in UV lamp helps eliminate bacteria, viruses, and microorganisms—ideal for humid subtropical Florida.
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—perfect for Middle River homes dealing with Northeast Florida’s hard water. 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 Middle River
$995
Installed
Regularly