ROB-500G Water Purifier

A New Generation
5G Water Purifier That
Fulfills All Your Wishes

Rental fee 1,300฿ /mo.

500GPD high-capacity reverse osmosis membrane
Double TDS meter
Automatic filter cleaning function
Water consumption meter for each filter
Stylish design with 13cm width
Easy to replace filter by yourself
Completely tankless
High-performance water leak sensor
First in Thailand! 2-route faucet for water purifier*Optional

For the first time in Thailand, we have adopted a Toray reverse osmosis membrane that is well-known to Japanese people. The 500GPD large-capacity reverse osmosis membrane (1.6L/min) allows tankless operation.
Two TDS meters make it possible to check the quality values of the tap water before purification and the pure water after purification, so you can see that the water you are drinking is safe.
The main filter is automatically cleaned to ensure you always have pure water.
The amount of water used by each filter is clearly shown on the panel display, so it is easy to know when to replace the filters.
Stylish design unlike any other reverse osmosis membrane water purifiers. (The 13cm width compact design saves installation space)
Easy to replace the filter yourself. (If you wish to, you can replace the filter yourself and pay the rental fee by bank transfer)
Thailand's first completely tankless system allows you to use as much water as you like. (It is necessary to replace the filter when the specified water usage is exceeded. Fee charged for filter replacement)
Equipped with a water leakage sensor. (If water is detected under the sink or around the water purifier, water purification stops immediately)
Your wife will be impressed! This is the first integrated faucet system in Thailand that allows both regular and pure water to be used. * Optional (rental price: 300฿ /mo.)

What is a Reverse Osmosis Membrane (RO System)?

Water produced by reverse osmosis membranes is pure water containing almost nothing but water molecules.

Except for natural water, most water sold at convenience stores and delivered to your home in Japan, Thailand, and other countries around the world is produced by reverse osmosis membranes.

This is the most advanced technology in today’s water purification, including the production of commercial drinking water, the conversion of seawater into drinking water, and the conversion of sewage into drinking water during disasters. The reverse osmosis membrane water purifier is a water purifier that can easily produce pure water in your own home.

Polka Dots currently has rental contracts with over 2,782 households (as of April 2025) in the Sukhumvit area alone.

Specifications

Product name:	Water Purifier ROB-500G
Size:	Width 13.2cm x Height 35.6cm x Depth 46.2cm
Filter structure:	Sediment + Carbon Block, RO, T33 Carbon Block (3-filter, 4-stage system)
Power supply:	110-240V 50/60Hz
Power consumption:	60W
Required water pressure:	0.1-0.4Mpa
Rental fee:	1,300฿ /mo.
Sales price:	23,000฿

Filter		Replacement period	Sales price
1st Stage PP+C 1 Filter 2 Stages	Sediment Filter + Carbon Block Filter ・The Sediment Filter removes impurities such as sediment, iron rust, and small particles. ・The Block Carbon Filter adsorbs and removes harmful contaminants such as residual chlorine, odor turbidity, and trihalomethane.	4 months	750฿
1st Stage PP+C 1 Filter 2 Stages		Regular Product Life Span 6 months	750฿
2nd Stage RO	Toray Reverse Osmosis Membrane Filter The filter perfectly removes impurities with particles as small as 0.0001 microns, which cannot be removed by the first filter stage. Reverse osmosis membrane completely removes radioactive materials, dioxins, mercury, elements, pesticides, nitrate nitrogen, etc., which are difficult to remove by other methods.	12 months	3,900฿
2nd Stage RO		Regular Product Life Span 18 months	3,900฿
3rd Stage T33	T33 Carbon Block Filter Dissolved gases and unpleasant odors are removed and the mellowness of the water is achieved by passing through an activated carbon filter.	8 months	750฿
3rd Stage T33		Regular Product Life Span 12 months	750฿

※ No filter replacement fee needed during the contracted period for rented products
※ All prices shown include tax
※ Warranty period of 1 year after sale

Water Purifier option100฿ discount as a set
with water purifier

Tank for increasing water volume and water pressure

・Add a tank to the water purifier to greatly increase water volume and water pressure ・Even in the event of a sudden power failure or water outage, you can use the water stored in the tank with no worry

８L Tank

For those who have enough space below the sink

Rental
fee 200฿ /mo.

\ Installation example /
3L Tank

For those who have little space below the sink

Rental
fee 200฿ /mo.

Keeps the sink area clear

Two-route faucet

Tap water and water purifier faucets are integrated. Separate pipes for each type of water for safety and cleanliness.

Rental
fee 300฿ /mo.