Ro/DI Waste water ratio?

tomreefer · 02/25/2020, 03:44 PM

Can you do this test without filters and membrane or they need to be in system? Reason I am asking I just sanitized my RO/DI and going to put in new restrictor and membrane in.

Vinny Kreyling · 02/25/2020, 05:25 PM

You need everything you would normally have for an accurate measurement.

Misled · 02/25/2020, 05:29 PM

Really the membrane and flow restrictor is all you need to test the waste water, but you take a chance of ruining the membrane doing it this way. Just put the whole system together and run it that way. The only thing you're adding is the pre filters. They are there to protect the membrane.

tomreefer · 02/25/2020, 06:14 PM

Ok I did it and getting 125ML water came out.. According to manual It says cut restrictor 14 inches but the restrictor is only 7.5 inches, I am confused here. I got the Red flow restrictor 90GPD from SpectraPure membrane.

tomreefer · 02/25/2020, 06:45 PM

Wait a minute I got the FR-90 red hard water preset flow restrictor so this can't be adjusted? I got wrong one?

clevername · 02/25/2020, 07:50 PM

i wouldnt trust something you cant test.
How are you testing the "restriction"? was this an Ebay unit?

tomreefer · 02/25/2020, 07:59 PM

No Bulk Reef Supply but I changed a lot of it its basically now a SpectraPure. I tested it by taking a measuring cup to output water and after 1 minute I get only 125ML that's not good.

Vinny Kreyling · 02/26/2020, 08:32 AM

Now you have to measure the amount of waste water produced in 1 minute.
If it is around 500 ML you are good.

mcgyvr · 02/26/2020, 10:44 AM

Quote:

Originally Posted by Vinny Kreyling

Now you have to measure the amount of waste water produced in 1 minute.
If it is around 500 ML you are good.

If they have a 50GPD membrane then yes "Good"
125mL a minute comes to just under 50 Gallons a day..

But it seems they have a larger one than that..

Here were my questions from their other post about this..
I'll just paste them here..

Quote:

Seems to be around 50GPD..

What membrane do you have?
What is your incoming water pressure?
How much waste are you getting in that amount of time?
What is the incoming water temperature?
Are these all new filters?

What brand RO/DI unit are you using?
What were you getting before?

02/25/2020, 03:44 PM	#1
tomreefer Registered Member Join Date: Jan 2014 Posts: 767	Ro/DI Waste water ratio? Can you do this test without filters and membrane or they need to be in system? Reason I am asking I just sanitized my RO/DI and going to put in new restrictor and membrane in.

02/25/2020, 05:25 PM	#2
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	You need everything you would normally have for an accurate measurement. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

02/25/2020, 05:29 PM	#3
Misled RC Mod Join Date: Oct 2006 Location: Pittsburgh, Pa Posts: 11,440 Blog Entries: 11	Really the membrane and flow restrictor is all you need to test the waste water, but you take a chance of ruining the membrane doing it this way. Just put the whole system together and run it that way. The only thing you're adding is the pre filters. They are there to protect the membrane. __________________ Jesse I'm not saying I'm Batman. I'm just saying nobody has ever seen me and Batman in a room together.

02/25/2020, 07:50 PM	#6
clevername Registered Member Join Date: Feb 2007 Location: Manchester, MO Posts: 1,125	i wouldnt trust something you cant test. How are you testing the "restriction"? was this an Ebay unit? __________________ In process: 210gal, VARIOS-8 return, Kessil Lights, 80 gal sump, mp60's, and REGAL 200EXT 8" RECIRCULATING skimmer

02/26/2020, 08:32 AM	#8
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Now you have to measure the amount of waste water produced in 1 minute. If it is around 500 ML you are good. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

02/25/2020, 06:14 PM	#4
tomreefer Registered Member Join Date: Jan 2014 Posts: 767	Ok I did it and getting 125ML water came out.. According to manual It says cut restrictor 14 inches but the restrictor is only 7.5 inches, I am confused here. I got the Red flow restrictor 90GPD from SpectraPure membrane.

02/25/2020, 06:45 PM	#5
tomreefer Registered Member Join Date: Jan 2014 Posts: 767	Wait a minute I got the FR-90 red hard water preset flow restrictor so this can't be adjusted? I got wrong one?

02/25/2020, 07:59 PM	#7
tomreefer Registered Member Join Date: Jan 2014 Posts: 767	No Bulk Reef Supply but I changed a lot of it its basically now a SpectraPure. I tested it by taking a measuring cup to output water and after 1 minute I get only 125ML that's not good.