Viva21 5-Stage Reverse Osmosis System (V21RS5S01)

How often do the filters need replacing?

The filters have a 12-month lifecycle under normal usage conditions. However, replacement frequency depends on your water quality and consumption levels. Areas with higher TDS (total dissolved solids) may require more frequent changes. The system supports water with TDS levels up to 1000 ppm and you'll notice decreased water flow when filters approach replacement time.

What contaminants does this system remove?

This 5-stage reverse osmosis system removes up to 99% of harmful contaminants including PFAS (forever chemicals), chlorine, fluoride, lead, arsenic, asbestos, bacteria, viruses and hundreds of other pollutants. The NSF/ANSI 58 and 372 certifications verify its effectiveness against these specific contaminants, ensuring your water meets strict safety standards.

How much space is required under the sink?

The system measures 48.3cm length × 45.7cm width × 40.6cm height and weighs 13.2kg. You'll need adequate clearance around the unit for filter changes and maintenance access. The modular design allows flexible positioning and the system fits most standard kitchen cabinets whilst leaving room for other plumbing fixtures.

Can I install this system myself?

Yes, the system includes a complete DIY installation kit with colour-coded connections and detailed instructions. Most homeowners complete installation within 2-3 hours using basic tools. The kit includes the faucet, tank, filtration unit, tubing, leak detector and all necessary fittings. However, if you're uncomfortable with plumbing work, professional installation is recommended.

How does the water taste compared to bottled water?

The reverse osmosis process removes chlorine and other taste-affecting chemicals, resulting in clean, crisp water that often tastes better than bottled water. The lead-free faucet design further enhances taste quality. Many users report improved flavour in coffee, tea and cooking, whilst ice cubes become crystal clear without the cloudiness common with tap water.

What's included in the warranty coverage?

The system comes with a 1-year limited warranty covering manufacturing defects and component failures under normal use. This includes the tank, faucet, filtration housing and connections. The warranty is backed by USA-based customer support providing technical assistance and replacement parts. Consumable filters are not covered but have predictable replacement schedules.

How much water does the system produce per day?

The system produces filtered water continuously, with the 50-gallon tank providing immediate access to purified water. Production rate depends on water pressure and temperature, but the tank typically refills within 2-4 hours after heavy usage. This capacity easily supports a family's daily drinking, cooking and food preparation needs without waiting periods.

Does this system waste water during filtration?

Like all reverse osmosis systems, this unit produces some wastewater during the filtration process. The ratio is typically 3:1 or 4:1 (waste to clean water), which is standard for RO technology. However, the water savings from eliminating bottled water purchases, combined with the health benefits of contaminant removal, make this an environmentally responsible choice overall.