RO Waste Water

geckofrog · 09/12/2006, 03:16 PM

What is the average ratio of waste water for RO units?

Like for every x amount of gallons, you get x amount of water you can use.

Anyone know? I know its different per area, but a range?

Slickdonkey · 09/12/2006, 03:28 PM

My RO unit used to be 1:4. But there are so many factors that can have an effect, like water temperature, water pressure, whether a DI membrane is present, etc, etc, etc...

rockindacheeks · 09/12/2006, 04:08 PM

mine is 3 gallons watse for every 1 gallon clean water produced.

vanmo92 · 09/12/2006, 04:30 PM

well i did somethin to my membrane so noit its like 1:15 (one good, 15 bad). but when my membrand eas still good it was about 1:6. But my psi is pretty low and it varries. (we are on a well)

AZDesertRat · 09/12/2006, 06:57 PM

4:1 waste to product ratio is the industry standard. Check to see if the membrane is seated correctly in the housing. Other things that can affect flows are low pressure and low temperature or both

honeybee · 09/12/2006, 07:15 PM

I am using a PurFloII 50 gallon per day on a well. House water pressure is 20 low and 40 high. On house pressure I get 2 gallons waste for each gallon of RO. If I use the pump that came on the RO unit I get 1.5 gallons waste for each gallon of RO. A Kill-a-meter indicates the pumps only uses 18 watts. If I ran the pump 24/7/30 it would cost me $1.29 per month. A good investment for people on low pressure systems.

Honeybee

09/12/2006, 03:16 PM	#1
geckofrog Registered Member. Join Date: Jun 2006 Location: Texas Posts: 505	RO Waste Water What is the average ratio of waste water for RO units? Like for every x amount of gallons, you get x amount of water you can use. Anyone know? I know its different per area, but a range? __________________ Ryan Current Tank Info: 75G,

09/12/2006, 04:08 PM	#3
rockindacheeks Registered Member Join Date: Jul 2005 Location: Corona, California Posts: 2,072	mine is 3 gallons watse for every 1 gallon clean water produced. __________________ My name is Dan, and I'm a closet reefer... Current Tank Info: 28g nanocube

09/12/2006, 04:30 PM	#4
vanmo92 Registered Member Join Date: Aug 2005 Location: Silverthorne, CO. Posts: 2,045	well i did somethin to my membrane so noit its like 1:15 (one good, 15 bad). but when my membrand eas still good it was about 1:6. But my psi is pretty low and it varries. (we are on a well) __________________ PBITAWA Current Tank Info: 72 gallon bow Mixed Reef 1 fw tank

09/12/2006, 03:28 PM	#2
Slickdonkey Registered Member Join Date: Feb 2006 Location: Woodinville, WA Posts: 375	My RO unit used to be 1:4. But there are so many factors that can have an effect, like water temperature, water pressure, whether a DI membrane is present, etc, etc, etc...

09/12/2006, 06:57 PM	#5
AZDesertRat Moved On Join Date: Jan 2002 Location: NW Phoenix Posts: 16,621	4:1 waste to product ratio is the industry standard. Check to see if the membrane is seated correctly in the housing. Other things that can affect flows are low pressure and low temperature or both

09/12/2006, 07:15 PM	#6
honeybee Premium Member Join Date: Dec 2001 Location: Charleston, Ill Posts: 186	I am using a PurFloII 50 gallon per day on a well. House water pressure is 20 low and 40 high. On house pressure I get 2 gallons waste for each gallon of RO. If I use the pump that came on the RO unit I get 1.5 gallons waste for each gallon of RO. A Kill-a-meter indicates the pumps only uses 18 watts. If I ran the pump 24/7/30 it would cost me $1.29 per month. A good investment for people on low pressure systems. Honeybee