(A) Introduction
This 4-stage RO system reduces dissolved contaminants such as Barium, Cadmium, Chromium, Copper, Fluoride,
Lead, Mercury, Nitrates, Sodium, TDS, Chlorine, Taste and Odour. It also traps >99.95% cysts (Cryptosporidium &
Giardia) greater than 99.95% and filters sediment, silt and rust. Water produced by the Rainfresh RO system can be
used for drinking, cooking, juices, beverages, watering plants, steam irons, humidifiers, aquariums etc.
How your RO system works : Water first flows through a 1 micron sediment
filter (HP1) followed by an activated carbon filter (CF2) that reduces chlorine,
taste and odour. The third stage is the membrane that rejects most of the
dissolved contaminants listed above, while the filtered water (permeate) passes
through a final stage of taste and odour polishing, before flowing out of the
faucet. As the RO membrane rejects contaminants at a molecular level, some of
the water, along with the contaminants, flows to the drain. To achieve such fine
filtration, the water production rate is slower than conventional under-sink
filtration systems. Therefore, a pressurized storage tank is used to provide RO
water through the faucet at normal flow and pressure. When the storage tank
is full, an automatic valve shuts off the water supply to the RO membrane. As
water is used from the faucet and the pressure in the tank drops to about 65%
of full pressure, the automatic shut-off valve opens and allows feed water into
the RO membrane until the storage tank is full again.
(B) Safety Instructions
o This filter system is designed for residential point-of-use indoor use only. Protect filter from direct sunlight.
o If water pressure will at any time exceed the 100 psi maximum, a pressure regulator and water hammer arrestor
must be installed before the filter to prevent potentially damaging shocks caused by high pressure.
Recommended regulator setting is 75 psi / 5.1 bar/ 517 kPa or less. Not for installation in multi-storey
buildings over 4 storeys.
o Do not subject to freezing temperatures with water inside the unit. If your unit will not be used in winter, or will be
subject to freezing temperatures, drain unit completely (see "Maintenance")
o This system is intended for use with cold water only. Do not install on hot water.
o Use only Rainfresh replacement cartridges. Only Rainfresh filter cartridges will function with this system.
o Do not lubricate head O-rings with petroleum based lubricants. Only food-grade silicone (Dow 111
compound) should be sparingly used.
o Clean with warm soapy water only. Do not use cleaning sprays
o Installation of this unit may involve some water spillage. Keep paper towels or an absorbent cloth handy.
o Do not attempt to operate the system without the pre-filters. This can severely damage the membrane.
o Ensure that there are no kinks in any of the tubing that can restrict or stop the water flow.
o Installation shall comply with applicable plumbing codes and regulations. This unit comes complete with all
necessary fittings to install the unit below the counter to copper or CPVC rigid plastic pipe. The water supply saddle
valve is included for use in areas where codes permit.
(C) Technical Specifications
Membrane Capacity
Dimensions (excluding faucet)
Air-gap chrome faucet
3.2 Gal Storage tank
1 Micron Pre-filter 1 model (Life)
5 Micron Pre-filter 2 model (Life)
RO Membrane model (Life)
Post-filter model (Life)
*Cartridge and membrane life is directly dependent on your water conditions and the volume of water filtered.
MODEL
RO450
50 gallon per day
11.2"W x 13"H x 5" D
Included
Included
HP1 (6 months)*
SW1 (6 months)*
CF2 (6 months)*
ROM50 (1-4 years)*
IM200 (6 months)*
RO450H
3