Expert MO530 / MO580

Slim Undersink Reverse Osmosis Water Filtration Systems with a Storage Tank

The high-end slim Reverse Osmosis water filtration systems with a storage tank, 4- or 5-stage filtration, 75gpd encapsulated R.O. membrane element and optional built-in booster pump to be installed under the kitchen sink for cleanest and safest water right at your home

Expert MO530 / MO580 Conventional R.O. Systems with a Storage Tank
Optional integrated booster pump

Reverse Osmosis

Storage Tank

Pump Optional

Multi-Stage Filtration

Quick Change Filters

2 L/min

About R.O. Filtration

Reverse osmosis is currently the most advanced yet natural method of water purification. Semipermeable membrane allows only water to pass through and rejects everything else.

R.O. treated water is free from chlorine, heavy metals, other dissolved solids and ions, bacteria and viruses. This water is safe and refreshing, requires no boiling and is a good choice for all kind of use including newborn baby feeding.

Make no mistake, this osmosis process is as much natural as it can be since it’s essentially the same as the one in every living cell on Earth. Cell membrane allows only what it needs to get through and rejects everything foreign.

These days the human genius reproduced this natural process in a highly sophisticated nanotechnology device right at your sink.

No magic, no unproven claims – just pure science! Reverse osmosis is used everywhere when real clean water is needed, not claims: from pharmaceutical production to space station water supply, from multi-million population area municipal water desalination plants to marine ship rescue kits.

Beyond Bottled Water Quality

  • Expert MO-series Reverse Osmosis systems deliver safe, clean and joy inducing water right at your home, every day.
  • No need to transport and dispose of bottled water any more!
  • Great for drinking, ice makers, beverages, coffee & tea, food preparation & cooking, sports, etc.
  • These R.O. systems remove odor and most harmful substances such as heavy metal ions and total dissolved solids from tap water making it tasty, fresh and vital. They deliver a pure, refreshing experience with no aftertaste of heavy metals, limescale or chlorine.
Make Your Contribution to Saving Our Planet

Make Your Contribution to Saving Our Planet

Save your pocket as well as our Planet: cut your costs dramatically by switching from bottled water to an in-house water purifier and reduce environmental impact of water bottles’ carbon footprint and plastics in the landfills.

How It Works

The system usually mounts under the kitchen sink with the purified water faucet been installed on the sink or deck. An available on the market combo tap with built-in waterway for filtered water can also be used.

To get fresh and clean water instantly just open the faucet, and everything else will be performed automatically.

What Makes It Special

R.O. filtration system that's perfectly engineered, environmentally friendly and remarkably useful

R.O. high rejection rate membrane of genuine Toray sheet made in Japan.

Slim and modern space-saving design, premium look and feel.

Zero or low noise.

Quick-change encapsulated filter and membrane elements for easier maintenance.

Zero or low energy consumption.

Premium designer faucet.

Factory-preinstalled filters and membrane, worldwide tee-adapter valve, push-to-connect quick fittings, etc. for faster and easier setup and convenient use.

3.2, 4 or 5 gallons storage tank options.

Quick-change encapsulated membrane element

Like New Every Day!

Unlike multi-stage in-line filters with cartridges the reverse osmosis system does not absorb and keep dirts inside. The membrane separates clean water from dissolved solids and other rejected particles that go down the drain.

Thus, R.O. system is “like new” every day! It remains clean and delivers safe purified water without the risk of its secondary contamination.

Encapsulated Reverse Osmosis Membrane Element Inside (Drawing)

Built-in Booster Pump

For Expert MO580 model only.

Built-in Booster Pump

  • The most compact comprehensive, no-compromise R.O. machine with a booster pump on the market.
  • Increases pressure to radically improve the performance and effectiveness of the R.O. unit in all three key areas: increases filtered water flow (production rate), increases rejection rate (improves water purification quality), increases recovery rate (decreases amount of waste water).
  • Prolongs the membrane and pre-filter(s) service life due to increased recovery rate.

Useful Features

This system is designed to be effective, appealing and easy to use

Quick-change filter elements

Changing encapsulated filter elements and membrane is a snap!

Push-to-connect quick fittings for easy tube connections

Push-to-connect quick fittings for easy tube connections

Premium designer faucet included

Premium designer faucet included

High-end 3.2, 4 or 5 gallon storage tanks to choose from

High-end 3.2, 4 or 5 gallon storage tanks to choose from

Get a Second Pure Water Line Option for Free

An extra union tee fitting is included in the set that can be used to get a second line of clean water going to the other point-of-use (such as a sink in a bathroom or ice maker in a fridge).

If you’re still using bottled water for drinking today, you’ll be making a smart investment that saves you money in the long run and is better for the environment.
Get better than bottled water quality without the bottle!

Multi-Stage Filtration System

  • 5-micron sediment poly block pre-filter1 to filter suspended particles such as mud, sand, rust, etc.
  • Carbon block to reduce free chlorine, chloramines, chlorine taste and odor.
  • 75gpd R.O. membrane element to reduce dissolved solids, metal ions, bacteria and viruses, and other suspended particles as small as 0.0001 micron.
  • Two-stage water conditioning combo post-filter.

5 μm Sediment Poly Block Pre-Filter K871


5 μm Sediment Poly Block Pre-Filter

Effective reduction of:

  • rust, mud, sand and sediment
  • other contaminants*
Coconut Carbon Block Pre-Filter K870


Coconut Carbon Block Pre-Filter

Effective reduction of:

  • dirts, sand and sediment
  • taste and odor, including chlorine taste and odor
  • other contaminants*
75gpd R.O. Membrane Element K866


75gpd R.O. Membrane Element

Effective reduction of:

  • suspended solids
  • dissolved ions
  • bacteria and viruses
  • other contaminants*
Coconut Carbon Block and Remineralization Water Conditioning Post-Filter K880


Coconut Carbon Block and Remineralization Water Conditioning Post-Filter

  • improves taste and removes odor, remineralizes water*

Set Includes:

  • Multi-Stage Filtration Unit with R.O. Membrane and Built-in Booster Pump2
  • Storage Tank
  • Designer Faucet
  • Installation Kit

1 For models without pump only.
2 For models with pump only.

Related Products

What's in the Box

(1) Multi-stage filtration unit with installed filters

(1) Storage tank with tank valve

(1) Universal worldwide adapter ball valve (G1/2” - G3/8” - UNEF 9/16”-24 - JG 1/4”)

(1) Teflon tape roll

(1) Faucet

(1) Drain saddle

(1) Wrench

(1) ¼” union check valve

(2) ¼” union tee fitting

(26 ft/ 8 m) Water tubing ¼”

(1) Power supply (for models with pump)

User’s guide

Technical Data

Operating Requirements:

  • Minimum supply water pressure: 30 psi (0.2 MPa); 7.25 psi (0.05 MPa)5
  • Maximum supply water pressure: 80 psi (0.55 MPa)
  • Minimum water temperature: 41 °F (5 °C)
  • Optimal water temperature: 59—77 °F (15—25 °C)
  • Maximum water temperature: 95 °F (35 °C) / up to 105 °F (40.5 °C) short-term
  • Ambient air temperature: 41—105 °F (5—40.5 °C)
  • Water source: tap water supply, chlorinated or non-chlorinated, bacteriologically safe
  • Supply water pH range: 4.0—11.0
  • Supply water turbidity: < 1 NTU
  • Supply water components: Hardness (CaCO3) <180 mg/L (<10.5 gpg), Iron <0.1 mg/L, Manganese <0.05 mg/L, Hydrogen Sulfide 0.00 mg/L
  • Maximum supply water TDS: 1000 ppm
  • Indoor use only.
  • Tubing: ¼”
  • Electrical input5: AC 100—240V 50/60 Hz
  • Electrical plug5: US Type A / Europlug CEE 7/16


Performance of the appliance such as filtered water delivery rate, rejection rate, etc. is highly dependent on local conditions (inlet water pressure, temperature, TDS and degree of contamination, tank air pressure, etc.) and R.O. system use pattern. Actual performance may vary.

  • Filtered water production rating: 75 gpd (270 lpd) maximum
  • Filtered water delivery rate (from the tank), typical: 0.27—0.74 gpm (1—2.8 l/min)
  • Membrane rejection rate1, typical: >90%
  • Recovery rate (system efficiency2), typical: 15%
  • Drain water flow restrictor: 300 cc (ml/min) nominal, up to 360 cc in working mode.
  • Tank Storage Capacity (Total Volume)3: up to 2.0G (3.2G); or up to 2.5G (4.0G)
  • Tank full refill time4, typical: 70—120 min; 35—45 min5

Weight and Size:

R.O. Filtration Unit:

Size (WDH), body only, excluding protrusions: 13.46 x 3.35 x 14.80” (342 x 85 x 376 mm)

Weight, without water and tubing: 8.8 lbs (4.0 kg); 11.9 lbs (5.4 kg)5

Storage tank:

Tank model No. X842G; X852G:

Storage Capacity (Total Volume): up to 2.0G (3.2G); up to 2.5G (4.0G)

Size (WxDxH), body only, excluding protrusions: 9.8 x 9.8 x 13.6” (250 x 250 x 347 mm); 10.55 x 10.55 x 14.90” (268 x 268 x 378 mm)

Weight, without water and tubing: 4.7 lbs (2.1 kg); 6.0 lbs (2.7 kg)


Fully CE certified and conforms to Directives and Standards EU 2015/1787, 98/83/EC, 2014/30/EU, 2014/35/EU, EN13443-2:2005+A1:2007, EN14898:2006+A1:2007, EN14652:2005+A1:2007, etc.


1 year worldwide limited warranty (+ local regulations if applicable)

1 For all dissolved solids combined as measured by TDS or conductivity meter.

2 Efficiency rating means the percentage of the influent water to the system that is available to the user as reverse osmosis treated water under operating conditions that approximate typical daily usage.

3 Depending on SKU.

4 Depending on supply water pressure and tank's volume.

5 For models with pump.


Get more information on Expert MO530 / MO580 systems in downloadable PDF documents

Ready to get started?

Select the model that better serves your needs:
Expert MO530: 4G tank, faucet, no pump
Expert MO580: 4G tank, faucet, built-in booster pump

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