See the purity, trust the technology. A tankless under-sink system that delivers ultra-pure, clean, refreshing water on demand—built for Kings Bay’s hard water and coastal conditions.
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, with a UV chamber inline. No bulky storage tank—so in humid coastal Northeast Florida, you get purified water on demand, not water sitting and waiting.
The first cartridge catches rust, dirt, sand, and larger particles—helpful with Kings Bay’s mineral-heavy water.
Carbon block media that reduces chlorine, odors, colors and chemicals before the membrane—great for Kings Bay water.
The heart of the system—rejecting dissolved solids and heavy metals that can come with hard Kings Bay groundwater, and sending the concentrate to the drain.
The final cartridge polishes the water and adds beneficial minerals back for a balanced pH—great for Kings Bay drinking water.
Filtration Stages
Each stage handles something the one before it left behind. That matters with Kings Bay’s hard water and mineral content. 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—common with hard water in Nassau County.
Removes chlorine, odors, colors and chemicals from Kings Bay tap water.
Removes up to 99% of dissolved solids, heavy metals and more—helping fight scale from hard Kings Bay water.
Kills 99.99% of bacteria, viruses and microorganisms.
Adds beneficial minerals for a balanced, healthy pH—great for Kings Bay 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—helpful in coastal Northeast Florida—and it’s included in the price on every system we install.
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 Kings Bay and Nassau County homes.
1 UnitInstalled
Regularly $2,000 - you save $1,005
The standard install, and the right fit for a kitchen sink in most Kings Bay homes.
2 UnitsInstalled
A lower price per unit on a two-system install in Kings Bay.
Ideal for a kitchen and wet bar, a second kitchen, or a guest suite—great for Kings Bay homes.
3 or MoreInstalled
Our lowest per-unit price in Kings Bay
Ideal for larger Nassau 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 Kings Bay 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 Kings Bay homes.
Typically 95% and up to 99.99%, bringing 200–500 PPM tap water to near 0 PPM, or below 25 PPM—results vary across Nassau County source water.
The lamp operates automatically based on water flow pressure, and can be adjusted for your Kings Bay home.
Keeps water fresh, saves under-sink space, and helps prevent secondary contamination—ideal for coastal Northeast Florida homes.
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—less plastic to haul around Nassau County.
One Unit, Installed in Kings Bay
$995
Installed
Regularly

Unit, all four cartridges, faucet, fittings & all parts—everything you need in Kings Bay.

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

Fitted under your sink and commissioned by Kings Bay water purification pros.

We test your Kings Bay water before and after, so you can see the difference.

No surprises in Kings Bay. One low price includes everything.

Lower per-unit pricing when we install two or more in your Kings Bay 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 - a smart choice for Kings Bay’s hard-water conditions.
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 Kings Bay so you know exactly what you’re starting from.
Perfect For
Point-of-use purification means the water you drink and cook with in Kings Bay is the water that gets filtered.
Cleaner Water. Better Living. In Kings Bay.
Installed by a Florida plumbing company serving Kings Bay and Nassau County—experienced work you can feel good about.
Built with premium materials for reliable, long-term performance in coastal Kings Bay.
The built-in UV lamp is included in the price on every unit we install in Kings Bay.
We stand behind our products and the quality of our service in Kings Bay.
Join Kings Bay homeowners in Nassau County who choose Mr. Pure Water.
Product Assurances
Better-tasting, odor-free water for drinking, cooking, and everyday use in Kings Bay.
The tankless design purifies as you draw—great for Kings Bay homes—so there’s no storage tank and no waiting.
The built-in UV lamp helps eliminate bacteria, viruses and microorganisms a filter cannot catch.
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 Kings Bay’s humid, coastal Northeast Florida conditions. 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, helping reduce the mineral content that can contribute to scale buildup in Kings Bay plumbing and water-using appliances, 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 Kings Bay
$995
Installed
Regularly