Waterdrop G5P500 Reverse Osmosis Water Filter (500G/Day, Tankless)

How much space does this tankless system save compared to traditional RO systems?

The tankless design saves up to 70% more kitchen space compared to traditional tank-based RO systems. Without the bulky storage tank, the G5P500 fits neatly under your sink with dimensions of 42.4cm x 14.5cm x 35.3cm. This compact footprint makes it ideal for modern kitchens where space is at a premium, whilst still delivering 500 gallons per day capacity.

What contaminants does the 7-stage filtration remove from my water?

The system removes harmful contaminants including PFOA, PFOS, chlorine, lead, fluoride, heavy metals and particles larger than 0.0001μm. The high-precision reverse osmosis membrane effectively filters out bacteria, viruses, dissolved solids and chemical pollutants. TDS levels typically drop from around 300ppm to 15ppm, delivering pure, safe drinking water with no bad taste or odour.

How fast does the system produce filtered water?

The G5P500 fills a 180ml cup in just 8 seconds with its 500 gallons per day capacity. Unlike tank systems where you might wait for refilling, this provides instant access to filtered water on demand. The steady flow rate ensures you have continuous supply for drinking, cooking and food preparation without delays.

What does the 2:1 pure to drain water ratio mean?

For every 2 cups of pure water produced, only 1 cup goes to drain as waste water. This efficient ratio produces 400% more pure water compared to traditional RO systems that typically waste 3-4 cups for every cup of pure water. This efficiency saves money on water bills whilst reducing environmental impact.

How difficult is the installation process?

Installation requires basic DIY skills and connection to your cold water supply pipe. You'll need to drill a hole in your countertop for the faucet and connect to the drain pipe. In the UK, you may need a 15mm compression stop valve if not already fitted. The system includes all necessary components except additional plumbing fittings that may be required for UK installations.

How often do I need to replace the filters and what's the cost?

Filter replacement is recommended annually and costs approximately £80 per year. This works out to about 22p per day for pure filtered water. The filters are easy to replace with a simple twist-and-lock mechanism. Compared to buying bottled water at around £1 per day, the system pays for itself within the second year of use.

Is the system certified for safety and quality?

Yes, the G5P500 is NSF/ANSI 372 certified, ensuring all components meet strict safety standards for lead-free plumbing materials. This independent certification verifies that materials in contact with drinking water are safe and compliant with health regulations. All components are also BPA-free for additional safety assurance.

How quiet is the system during operation?

The system operates with a low humming sound from the motor during filtration cycles. Whilst not completely silent, the noise level is minimal and not distracting during normal kitchen activities. The sound only occurs when water is being drawn, making it much quieter than many household appliances like dishwashers or waste disposal units.