Flow from RO unit

Question:

I have recently purchased a 189 litre (50 US gallon) per day reverse osmosis system. I have connected the unit to the water mains via a D & D booster diaphragm pump. By my calculation 189 litres per day is equal to 7.8 litres per hour flow rate.

I am currently getting 14 litres per hour flow rate (water temp 18.5 degrees C). I am concerned that if the flow rate is so high is there something wrong with the membrane or unit?

Answer:

Webber
All membranes are tested at a standard temperature of 25C and a pressure of about 4 bar.
The booster pumps allow the pressure to increase to 8 bar which gives you an increased flow rate and an increase in efficiency.
If you have the correct flow restrictor on your unit, (350mls), and you have a TDS of about 3-5 then this will be the right flow.

I assume that the pipes are connected round the right way and you are collecting product water and not the waste water.
To test this open the flow restrictor and you should get the majority of water then through the orange pipe and little if anything through the blue.

All the best
Stuart

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Flow from RO unit

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