Regular price $735.00
Regular price $735.00
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  • 5 Stage Reverse Osmosis system with High Ph 8-9
  • QMP American Made Housings
  • Low Waste configuration
  • Omnipure USA made Carbon filters & Filmtec membrane
  • Various Faucet options (Comes standard with model "C")
  • Storage tank options- 4.2L, 9L or 12L
  • Mains connection kits- 1/2" Braided hose, 3/4" Dishwasher or 1/2" copper pipe connection options. Includes pressure limiting valve as standard.

The Reverse Osmosis Undersink 5 Stage model PSI-021-5RM-HA is a premium low waste 1 to 1 ratio unit featuring the exclusive membrane flushing with a full size Hi Alkalizer re-mineraliser. This re-fillable alkalizer system will produce water with an alkalinity of 8.5 to 9.5 pH. It has the Dow Filmtec 300 litre per day TFC membrane, the 300 litres is rated at 50 psi (350 kpa) but will produce up to 450 litres per day higher pressures.

All components are NSF certified to standards 042, 053 or 058. Supplied with QMP-300-HP U.S.A. made housing 10" Australian Standards AS3497 with 1/4" NPT threaded ports. This housing is tough with a burst strength of 575psi (4000kpa) and is tested to AS3497 which means it has been tested from 0 to 700kpa and back to 0 kpa 100,000 times without failure, cracking or distortion. Highest Quality QMP-300 US housings.

With these premium systems we supply the 550 kpa pressure limiting valve with dual check valves which is a plumbing code requirement. The valve is also Watermark AS1357-2 licence no 02596 as the watermark is also a plumbing code requirement.


* Main filter unit - 42cm wide, 42cm high and 14cm Deep.

* Storage tanks - Click here for tank details. Tanks can either stand up or lay down

  •  4.2L - 33cm high and 20.5cm diameter
  •  9L - 39cm high and 24cm diameter
  • 12L- 39cm high and 27.5cm diameter

Already Have the system and need replacement filters, Click on the below links-

Annual set of replacement filters- ROCDU-02 (12 months)

Membrane to Suit- 75GPD (3-4years)

Remineraliser replacement cartridge (24 months)

1 Micron food grade polyspun sediment filter 9 ¾" (248mm) (standard size) U.S. made

Omnipure OMB934-5m or Omnipure OMB934 Max5 quality carbon cartridge 9 ¾" (248mm) 22,500 litres chlorine rating, U.S. made

Genuine Omnipure CL10RO- Coconut carbon post filter, highest quality possible. U.S. made

Genuine Dow Filmtec TFC Membrane (standard by which all other membranes are measured)

Remineraliser Details-

The re-mineraliser (Alkalizer) which contains crushed Marble or crushed Limestone and coral sand. The material contained in the cartridge is mostly calcium but also contains trace elements of other minerals, this is the same material suppied with what are called Pi systems or Alkalizers. We are prevented from supplying a specification sheet as the amount of re-mineralisation is dependant on the pH of the water.

The remineraliser will add mainly calcium and magnesium to the water.

The re-mineraliser cartridge contains 2/3 crushed calcite (marble) and 1/3rd coral sand, the coral sand is the component that puts the pH up, you can add extra if you wish to go higher in pH. The coral sand will dissolve away over time and to maintain the high pH.

The reverse osmosis process can't pick the pepper out of the salt so to speak, so it is better to be sure and remove all the poisons from the water than be worried about the minerals that have been removed. Health experts say that you obtain the minerals that your body needs from your diet. You should not rely on water as a mineral source as there is very little available to the body in water as the minerals are totally dissolved, the re-mineraliser in this system is about balancing the pH as a taste issue.

Mains connections Kits-

1/2" Braided hose connection kit (Select this one if you have a flick mixer tap on the kitchen sink)

3/4" Dishwasher connection kit (select this one if you plan to connect the filter system to the same water connection point as the dishwasher)

 1/2" Copper/Tee Olive connection kit (select this one if you have copper piping under your kitchen sink)

Not sure what connection kit you need- Select the trio connection kit option and it will all include all options possible.

Options Faucets-

To view the optional faucets click here

Click on the above link to view the range of faucets which are compatible with the filter unit.

Key Infomation-

Click here to obtain more information about waste ratios

10 year warranty

 For membrane treatment rates click here.

All reverse osmosis systems require a minimum pressure of 40 psi (280kpa) with 50 psi (350kpa) or more is ideal. If you are unsure what your pressure is check with your local Council or water authority.

Operating pressure requirements 280 to 550 kpa (40-80 psi)

product comes complete, ready for installation.