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pure tech

  • Posts: 229
RO flow restrictor question
« on: January 09, 2012, 08:04:32 pm »
Can anyone tell me how a Flow 550 flow restrictor to suit 100gpd membranes works?
It is listed at 1:3  but does that alter if you add further membranes?
ie with 2 membranes it would be 1 part production to 2 parts waste and with 3 membranes would it be 1:1?
Thanks
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richard jagger

Re: RO flow restrictor question
« Reply #1 on: January 10, 2012, 02:20:49 am »
yOU NEED TO CHANGE IT EVERY TIME YOU ADD A MEMBRANE.
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richard jagger

Re: RO flow restrictor question
« Reply #2 on: January 10, 2012, 02:22:44 am »
The more membranes in series the lower the waste will be.I would say a booster pump is a must. 
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pure tech

  • Posts: 229
Re: RO flow restrictor question
« Reply #3 on: January 10, 2012, 02:40:05 am »
Thanks for that.
I actually have the original Flow 550  on my  300gpd 3 membrane RO and it has always produced at 1:1 until very recently.
It is now producing at about 70% product to 30% waste.
Apparently this is bad for the membranes.
I was just wanting to know if a new 550 100gpd (3:1) Flow Restrictor would run at 1:1 on my RO.
Thanks
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