Viqua VT1 & VT4 Ultraviolet Water Purifiers

The VIQUA VT1 and VT4 are compact point-of-use ultraviolet water treatment systems designed for single-faucet applications in homes, cottages, and OEM installations. These economical under-sink UV systems provide reliable chemical-free disinfection for drinking water while fitting easily into tight installation spaces.

Built with durable stainless steel chambers, specially designed UV lamps, and a compact power supply with visual status indication, the VT Series offers dependable performance with minimal maintenance. The VT1 is ideal for lower-flow single-tap applications, while the VT4 provides increased capacity for higher-flow point-of-use or select low-flow point-of-entry installations.

Features & Benefits

• Compact Point-of-Use Design: Designed for under-sink and single-faucet water treatment applications
• Chemical-Free UV Disinfection: Helps provide treated drinking water without adding chemicals to the water stream
• Two Flow Rate Options: Choose VT1 for lower-flow applications or VT4 for higher-flow installations
• High-Performance UV Lamp: Rigorously tested lamp provides consistent UV output over a 9,000-hour service life
• Durable Stainless Steel Chamber: 304 stainless steel construction helps extend service life and resist UV degradation
• Safety-Loc™ Connector: Interlock design helps ensure power is disconnected before the lamp can be removed
• Visual Status Indicators: Controller features LED power and lamp-on indication
• Easy to Maintain: Compact design simplifies service and routine lamp replacement
• Flexible Installation: Can be installed vertically or horizontally depending on available space

Microbial Protection

The VT1 and VT4 help inactivate common waterborne microorganisms including:

• Cryptosporidium
• Giardia
• E. coli
• Fecal Coliform

Model Differences

VT1
The VT1 is the more compact option in the series, designed for single-tap applications with flow rates up to 1 GPM (4 LPM) at 30 mJ/cm². It is a strong choice for dedicated drinking water faucets and low-flow point-of-use systems.

VT4
The VT4 offers higher treatment capacity, with flow rates up to 3.5 GPM (13 LPM) at 30 mJ/cm². It is well suited for higher-flow point-of-use applications and select low-flow point-of-entry or OEM installations where additional capacity is needed.

Technical Specifications

VT1

• Part Number: VT1
• Flow Rate @ 16 mJ/cm²: 2 GPM (8 LPM) / 0.5 m³/hr
• Flow Rate @ 30 mJ/cm²: 1 GPM (4 LPM) / 0.25 m³/hr
• Flow Rate @ 40 mJ/cm²: 0.7 GPM (3 LPM) / 0.2 m³/hr
• Chamber Dimensions: 12.5″ × 2.5″ (31.75 cm × 6.5 cm)
• Connection Size: 3/8″ FNPT, 1/2″ MNPT combo
• Voltage: 100–140V, 50/60Hz
• Power Consumption: 13W
• Shipping Weight: 4 lb (1.8 kg)
• Maximum Operating Pressure: 125 psi (8.62 bar)
• Influent Water Temperature: 36–104°F (2–40°C)
• Lamp Life: 9,000 hours

VT4

• Part Number: VT4
• Flow Rate @ 16 mJ/cm²: 6.5 GPM (24 LPM) / 1.4 m³/hr
• Flow Rate @ 30 mJ/cm²: 3.5 GPM (13 LPM) / 0.8 m³/hr
• Flow Rate @ 40 mJ/cm²: 2.5 GPM (9 LPM) / 0.6 m³/hr
• Chamber Dimensions: 17″ × 2.5″ (43.6 cm × 6.5 cm)
• Connection Size: 1/2″ MNPT
• Voltage: 100–140V, 50/60Hz
• Power Consumption: 20W
• Shipping Weight: 6.5 lb (2.8 kg)
• Maximum Operating Pressure: 125 psi (8.62 bar)
• Influent Water Temperature: 36–104°F (2–40°C)
• Lamp Life: 9,000 hours

Installation Notes

• Designed for indoor point-of-use or single-faucet applications
• Install on the cold water line only
• A 5-micron sediment filter should be installed ahead of the UV system
• The UV system should be the final treatment stage before the faucet whenever possible
• The chamber may be mounted vertically or horizontally; for horizontal installation, the outlet port should face upward
• The controller should be mounted horizontally above or beside the chamber with a proper drip loop
• A GFCI-protected outlet is recommended
• An optional bypass assembly may be used to simplify maintenance

Typical Installation Layout

The diagram below shows a typical under-sink point-of-use installation layout for the VIQUA VT Series with prefiltration and dedicated faucet delivery.

Documents:

System Manual

Ultraviolet Water Treatment Systems 

If you have any questions or are unsure about anything, please call us at (800)977-7292 or email us at sales@cureuv.com, and we will be happy to assist you.