VIQUA Arros Whole House UV Systems

Choose by peak simultaneous flow—the water used when multiple fixtures run together—and incoming water quality. Compare the exact model’s rating under the required treatment conditions, including any V or IHS suffix. Ask ESP Water for sizing help before ordering.

Pre-filtration is often necessary because UV light requires clear water for effective disinfection. Sediment and other particles can block UV light and reduce performance. Arros IHS10 models include sediment filtration; IHS12 and IHS22 models include sediment and carbon filtration. The right pretreatment depends on your water quality. Contact our sizing experts for help choosing a system.

The UV chamber disinfects water; it does not remove sediment, hardness, iron, chlorine or chemical contaminants. IHS models add sediment filtration, and IHS12/IHS22 configurations also include carbon filtration. Additional contaminant removal may require other treatment equipment suited to your water test results.

VIQUA Arros has been validated through microbial testing for inactivation of E. coli, Giardia, Cryptosporidium and fecal coliform. The Tidal™ chamber and UV lamp deliver the UV dose when the system is correctly sized, installed and maintained and water quality meets the system requirements. Arros V-series models are certified to NSF/ANSI 55 Class B; this certification applies to those specific models.

Learn more about bacteria, viruses and UV system maintenance.

For proper UV treatment, the water must be clear enough for UV light to pass through, with low turbidity (typically below 1 NTU) and minimal iron, hardness, or sediment. That’s why pre-filtration is important—cloudy or dirty water can block UV light and reduce disinfection effectiveness.

Replace the all-in-one lamp and quartz sleeve module annually, at approximately 9,000 operating hours, following the owner’s manual. The pre-assembled module makes replacement a task that takes minutes. The controller tracks lamp usage and provides replacement reminders; its lamp timer resets to 365 days when a new lamp is installed.

IHS models also need sediment filters—and carbon filters where included—replaced every 6–12 months or as needed for your water conditions. Follow the model’s owner’s manual for shutdown, draining, replacement and restart procedures.

The Arros features a compact Tidal™ chamber with aligned inlet/outlet ports and PolyProtect™ shielding, so it connects directly to PEX or polymer pipes. It installs horizontally or vertically with flexible flow direction.

VIQUA Arros combines the compact Tidal™ chamber, direct-to-PEX compatibility through PolyProtect™ shielding, flexible mounting and an all-in-one lamp and sleeve module. These features simplify installation and routine maintenance.

The range includes standard UV systems, V-series models certified to NSF/ANSI 55 Class B, and IHS configurations with integrated pre-filtration. Choose the model and pretreatment that match your flow rate and water quality.

VIQUA Arros is a line of ultraviolet water disinfection systems for whole-home and light commercial applications, including homes and cottages. The range offers 9, 15 and 22 GPM systems, flexible installation and an integrated lamp and quartz sleeve module. Call ESP Water Products for help selecting a system and appropriate pre-filtration.

V models carry NSF/ANSI 55 Class B certification for supplemental treatment of water already considered acceptable for drinking. Certified capacities are 6.4 GPM for Arros 9-V, 9.4 GPM for 15-V and 12.9 GPM for 22-V. Standard-model operating ratings use different conditions; compare the complete model and rating.

No. Mineral deposits can form on the quartz envelope and reduce UV transmission. Follow the cleaning and replacement instructions in your model’s owner’s manual, and maintain upstream prefilters.

Use the instructions for your exact model and equipment generation. Browse all owner’s manuals.

Replace the lamp unit annually, following the owner’s manual and controller alerts. Replace sediment and carbon prefilters according to the model’s instructions and your water conditions.