See the purity, trust the technology. A tankless under-sink system that delivers ultra-pure, clean, refreshing water on demand—built for Saint Augustine South families dealing with hard water and coastal humidity.
The System
The whole system fits under your sink and connects with quick-connect fittings. Four quick-change twist cartridges handle the four filtration stages, with a UV chamber inline. No bulky storage tank—so you get purified water on demand, ideal in Saint Augustine South’s humid coastal climate.
Stage 1 cartridge traps rust, dirt, sand, and larger particles—helpful with St. Johns County groundwater before water hits the next filters.
Carbon block media that reduces chlorine, odors, colors, and chemicals before the membrane—great for St. Johns County tap water.
The heart of the system—rejecting dissolved solids and heavy metals common in hard St. Johns County 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 everyday drinking in Saint Augustine South.
Filtration Stages
Each stage handles what the one before it left behind—especially helpful with St. Johns County’s hard municipal groundwater. UV is the fourth step and the one stage that isn’t filtration at all; it tackles what filters can’t catch.
Removes rust, dirt, sand, and large particles from St. Johns County water.
Reduces chlorine, odors, colors, and chemicals from local tap water.
Removes up to 99% of dissolved solids, heavy metals, and more—helpful for hard local water.
Kills 99.99% of bacteria, viruses and microorganisms.
Adds beneficial minerals for a balanced, healthy pH—perfect for daily drinking in Saint Augustine South.
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 Saint Augustine South.
Pricing
The systems are identical—the difference is how many you install on the same visit. Every unit includes UV sterilization and professional installation across Saint Augustine South and St. Johns County.
1 UnitInstalled
Regularly $2,000 - you save $1,005
The standard install, and the right fit for a kitchen sink in most Saint Augustine South homes.
2 UnitsInstalled
A lower price per unit when you install two systems.
Great for a kitchen plus a wet bar, a second kitchen, or a guest suite in Saint Augustine South.
3 or MoreInstalled
Our lowest per-unit price
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 Saint Augustine South 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 by St. Johns County source water).
The lamp operates automatically based on water flow pressure, and can be adjusted.
Keeps water fresh, saves under-sink space, and helps prevent secondary contamination—especially helpful in our humid coastal climate.
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 headed toward our beaches.
One Unit, Installed
$995
Installed
Regularly

Unit with all four cartridges, faucet, fittings, and every part needed.

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

Fits neatly under your sink and is professionally installed in Saint Augustine South.

We test your St. Johns County water before and after, so you can see the difference.

No surprises—one low price includes everything.

Lower per-unit pricing when we install two or more—ideal for Saint Augustine South homes.
Independent Testing
You don’t have to take performance on faith. The system has been tested by an independent laboratory against the recognized standard for reverse osmosis drinking water systems.
Testing verifies removal of over 99.99% of 1,000+ contaminants, including total dissolved solids like fluoride, nitrates and nitrites; PFAS, PFOA and PFOS; heavy metals like lead and arsenic; and chloride—helpful for hard local groundwater.
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 Saint Augustine South visit, so you know exactly what you’re starting from.
Perfect For
Point-of-use purification means the water you drink and cook with in Saint Augustine South is the water that gets filtered.
Cleaner Water. Better Living.
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 our coastal humidity.
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 work here in St. Johns County.
Join Saint Augustine South homeowners choosing Mr. Pure Water for better-tasting tap water.
Product Assurances
Better-tasting, odor-free water for drinking, cooking, and everyday life in Saint Augustine South.
Tankless purification as you pour—no storage tank and no waiting, even in humid coastal Florida.
The built-in UV lamp helps eliminate bacteria, viruses, and microorganisms filters can’t 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—great for Saint Augustine South homes dealing with hard St. Johns County groundwater. 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 Saint Augustine South
$995
Installed
Regularly