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Fig. 3: Membrane
Starting:
When all connections are tight, you can open the tap water. The minimum water pressure for the
unit is 3 bar. The nominal capacity is reached at 4 bar. If the pressure drops below 3 bar, the
production capacity is reduced, below 2 bar it also reduces the rejection rate.
Firstly, check all connections on water tightness. If leakage occurs, tighten the fittings or the
housing. Now, the concentrate flows out of the outlet at closed flush valve. After some minutes,
also purified water flows out of the permeat outlet, however, at a lower flow rate.
The flow rates of permeat and waste water are:
Reverse osmosis unit
Flow rate (litre/hour) at 4 bar and 15°C
Pure water/permeat
Waste water/concentrate
easy line 90
3.0 – 3.75 l
approx. 16 l
easy line 150
4.5 – 6.25 l
approx. 25 l
The pure water, produced in the first 2 hours, has to be discarded because it may contain residues
of the disinfection liquid which has been filled in the module for storage. After 2 hours, the water
can be used.
3. Use of the water
Rejection rate:
The retention rate of the membrane is approx. 95%. Nitrate and silicate are only rejected up to
max. 70%.
The water can be used in various areas:
In salt water aquaria:
- for preparation of salt water
- for preparation of „Kalkwasser“ or Calcium enriched water
- for re-filling evaporated water
In fresh water aquaria:
- pure for breeding soft water fish
- hardened up with Hydrocarbonate in all fresh water tanks
- pure for re-filling evaporated water
In households:
- for preparation of food and drinks
- for car batteries and flat irons
- for home plants, especially orchids, bromelids and cacti
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