Frizzlife MR600 Under-Sink Reverse Osmosis System: features and fit

The Frizzlife MR600 is an under-sink reverse osmosis (RO) system that supplies filtered drinking water from its own dedicated faucet. Unlike older RO units, it has no pressure tank, so it takes up less cabinet space. Here is what its main specs mean and what to confirm before fitting one.

What reverse osmosis does

In an RO system, water is pushed through a very fine membrane that lets water molecules through while holding back most dissolved solids. Frizzlife quotes a 0.0001 micron membrane and describes an eight-stage filtration path. Before the membrane, filters typically handle sediment and chlorine; afterwards, a polishing stage usually improves taste. The brand lists NSF certification for TDS (total dissolved solids) reduction. Check the certification documents for exactly what is covered.

Tankless design and the built-in pump

Traditional RO systems fill a storage tank and release water under pressure. The MR600 skips the tank and uses a built-in pump to deliver water on demand. Frizzlife says this avoids the possible issue of stored water sitting in a tank, and that it saves at least 80% of the space compared with tank systems. The pump means the unit needs a power connection, so confirm there is an outlet nearby.

Flow rate and the 3:1 ratio

The MR600 is rated at 600 gallons per day, with a flow rate of up to 0.42 gallons per minute. Frizzlife says a 330 ml cup fills in about 10 seconds. The 3:1 pure-to-drain ratio means that, per the brand, three parts of filtered water are produced for every one part sent to the drain. Older designs commonly waste more water, so a higher ratio generally means less going down the drain.

Filters and the life monitor

The system uses two large filter cartridges. They have a twist-and-pull design that Frizzlife says allows a change in about three seconds without tools. A filter life monitor on the operation panel shows when a replacement is due, so you do not have to keep track by calendar. Ask about replacement cartridge availability before buying.

Installation and fridge connection

Frizzlife describes the MR600 as DIY-friendly, with installation taking around 30 minutes, and compatible with most standard US kitchens using 3/8" and 1/2" connections. It can also supply a refrigerator when used with Frizzlife's fridge kit (sold separately). The unit measures about 12 x 4 x 12 inches and weighs 19.8 lb.

The brand notes that RO water can show many tiny bubbles when poured; this is a normal effect of air in the water.

What to check before you buy

• Space under the sink for a unit about 12 x 4 x 12 inches, plus room for drain and supply lines.
• A nearby power outlet for the pump.
• Your water supply connections and pressure compared with the manual's requirements.
• Space on the countertop or sink for the dedicated faucet.
• Replacement filter availability and the schedule in the manual.
• Local plumbing codes and rental or building rules. Follow the manual when installing.

The short version

• Frizzlife MR600: a tankless, 8-stage RO system for under the sink.
• Rated at 600 GPD, up to 0.42 gallons per minute.
• 3:1 pure-to-drain ratio, according to Frizzlife.
• Tool-free filter changes with a filter life monitor.
• DIY installation in about 30 minutes, listed for standard US connections.

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