About a year ago I got one of these cheap 3-stage RO filters. It works well but it's a bit slow: about 5 litres/hr at 3.8 bar.
For a total of £28 I've now fitted a higher capacity membrane and matching flow restrictor, which has more than doubled my collection rate to 12 litres/hr
If you're using a booster pump then you should get even more of an increase (@Mash Monster, @Hazelwood Brewery, @hughjamton )
*** Note: if you upgrade your membrane capacity then you MUST also change the rating of the flow restrictor ***
This is my filter, supplied with a standard 50GPD membrane
I used this 150GPD membrane (£22) and this 1500 ml/min flow restrictor (£6).
I'd have used a 1200 restrictor if I could have got one but the 1500 is close enough.
Ignore the '800GPD' description on the flow restrict listing - the seller doesn't know what they are talking about.
The new parts took less than 5 min to fit, and I've just flushed everything through and tested the new setup.
Results after 20mins
After 20 mins I had collected about 4 litres of filtered water and 19 litres of bypass water (which will be used to wash the car).
For a total of £28 I've now fitted a higher capacity membrane and matching flow restrictor, which has more than doubled my collection rate to 12 litres/hr
If you're using a booster pump then you should get even more of an increase (@Mash Monster, @Hazelwood Brewery, @hughjamton )
*** Note: if you upgrade your membrane capacity then you MUST also change the rating of the flow restrictor ***
This is my filter, supplied with a standard 50GPD membrane
I used this 150GPD membrane (£22) and this 1500 ml/min flow restrictor (£6).
I'd have used a 1200 restrictor if I could have got one but the 1500 is close enough.
Ignore the '800GPD' description on the flow restrict listing - the seller doesn't know what they are talking about.
The new parts took less than 5 min to fit, and I've just flushed everything through and tested the new setup.
Results after 20mins
After 20 mins I had collected about 4 litres of filtered water and 19 litres of bypass water (which will be used to wash the car).
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