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Navien’s WUR500 Tankless RO System is sleek, powerful, and refreshingly easy to maintain. The WUR500 is the smarter way to enjoy cleaner, healthier, low TDS drinking water straight from your tap without the bulky tank or slow refills of traditional RO systems.
Navien’s tankless reverse osmosis system delivers fresh, great-tasting water for peace of mind every time you pour a glass. Every drop is freshly filtered, with fast flow and more than enough capacity to keep up with the biggest, busiest households.
With a high 2:1 RO water to drain ratio, the WUR500 minimizes wastewater —so you get more refreshing water with less waste.
Polished metal smart faucet with time/filter replacement reminder and total dissolved solids (TDS) display.
Tankless design is compact
and helps prevent bacterial
growth common in tank systems.
Reverse osmosis technology filters particles as small as 0.0001 microns, delivering high-quality drinking water.
Smart features, compact size, and intuitive controls make WUR500 easy to install and effortless to use.
Polished metal smart faucet with three modes extends filter life: RO+ PCT, PCT Only, and Off.
Digital control panel features filter replacement alerts, system status indicators, and real-time TDS display.
Slim design fits neatly under standard kitchen sinks (15.9"H x 5.4"W x 17.1"L)
Quick to install - meets contractor needs
Luxurious look with matte
gunmetal finish
Water first flows through the PCT composite filter, a 3-in-1 filter made of PP sediment, carbon filter and post carbon block improving taste and quality.
Water then passes through a high-capacity reverse osmosis membrane that filters down to 0.0001 microns. A built-in high-performance pump eliminates the need for a storage tank.
With no tank, water is filtered continuously: fresh, fast, and always ready.
Navien’s WUR features a high-capacity dual-filtration system designed to be low-maintenance, so you can enjoy cleaner water with less work.
Designed with sustainability in mind, WUR500 helps you save water, reduce waste, and use less energy every day.
Transform your kitchen tap into a source of cleaner water for everything you do:
WUR500 is ideal for high-TDS regions, and valuable for municipal tap water everywhere.
WUR500 delivers premium drinking water right at the tap. Pair it with Navien’s WEC whole-house, saltless, tankless, electric water treatment system, and you get full-home water management.
Together, WUR500 and WEC deliver your family, your plumbing, and your appliances exceptional water quality from every fixture.
Learn more about
WEC Series
| Substance | Influent challenge concentration (mg/L) | Maximum permissible product water concentration (mg/L) |
| TDS | 750 ± 40 | 187 |
| Substance | Operating temperature | Operating pressure | Avg. % Reduction | Avg. % Recovery |
| Test Data | 41-100˚F / 5-38˚C | 40-100 psi (2.8-7.0 kgf/cm2) | 84.2 | 57.2 |
All the stated parameters related to the performance of this product are based on results derived from testing under standard laboratory conditions; actual performance may vary. The efficient rating means the percentage of the influent water to the system that is available to the user as RO-treated water under operating conditions that approximate typical daily usage.
17.1 x 5.4 x 15.9 in (434.3 x 137.2 x 403.2 mm)
| Limited Warranty Period | |||
| Products | Parts Non-Registered | Parts Registered | |
| WUR Series / WUA Series (Excludes Cartridge Filter) |
1 year | 2 years | |
Yes! Navien’s WUR500 tankless RO system delivers on-demand water filtration and purification without the drawbacks of traditional RO systems: no stagnant tank water, no slow refills, and no bulky equipment taking up space.
Instead of storing water in a pressurized tank, the WUR500 filters water in real time. Water flows through a 3-stage PCT filter and then an RO membrane, using a booster pump to maintain steady flow and pressure from your kitchen faucet.
All RO systems generate some wastewater during filtration. However, the WUR minimizes waste with smart flushing: just 18 seconds after startup or extended use. It has high filtered-to-drain ratio of 2:1 for superior efficiency compared to tank systems.
Yes. The WUR500 uses a small amount of electricity to power the pump and smart features, such as the digital display and filter life monitoring. The system simply plugs into a standard 120V household outlet.
Not necessarily. Unlike some tank-based RO systems, the WUR500 tankless RO system only flushes when needed: after power-up, extended use, or filter replacement.
The WUR500 tankless RO is built for long-term use. With routine filter changes (PCT: 8–12 months, RO membrane: 12–24 months), the system itself can last for many years with minimal maintenance.
No. Navien’s WUR500 tankless RO is an under sink point-of-use system designed specifically for safe kitchen and drinking water use. It does not impact home plumbing like whole-house RO systems might.
Yes, but our WUR500 tankless RO system makes it easy. The smart faucet and digital display let you know when it’s time to change filters. No guesswork, no manual checks, and no messy tank sanitizing.