RO DI questions

Milad · #1 05-21-2010, 02:18 AM

so i just did some measurements on pressure
80 at the tap
45 open flow after the pre filters before the membrane (also after the auto shut off valve which im not sure if it makes a difference)

now that being said, i have a flow restrictor on the waste and since last night its been set really low waste flow so the preasure is at 75 before the membrane (not 45)

so this 8am this morning until i got home from work, the 180g tank has filled 1/2 inch!!

thats 3.5gallons over 11 hours. that cannot be right!

Milad · #2 05-21-2010, 02:37 AM

btw this is the unit i have
http://oceanaquatics.com/store/produ...ximus-100-GPD/

hillegom · #3 05-21-2010, 05:42 AM

I see that there is a valve at the flow restrictor. You should try to keep that valve open fully when you are making ro water. Yes you waste more water, but you will flush the membrane and prolong its life when it is open.

mike31154 · #4 05-21-2010, 05:53 AM

Quote:

Originally Posted by Milad

so i just did some measurements on pressure
80 at the tap
45 open flow after the pre filters before the membrane (also after the auto shut off valve which im not sure if it makes a difference)

now that being said, i have a flow restrictor on the waste and since last night its been set really low waste flow so the preasure is at 75 before the membrane (not 45)

so this 8am this morning until i got home from work, the 180g tank has filled 1/2 inch!!

thats 3.5gallons over 11 hours. that cannot be right!

Yes, definitely something not right there. You have excellent water pressure so that unit should be producing as advertised and less than 4 gals in 11 hours is not the mama. I'm not familiar with systems having an adjustable flow restrictor on the waste line. My 75 gpd system has a combination flush valve/flow restrictor that's matched to the 75 gpd membrane. Waste to good water ratio is about 4 to 1 and I have no trouble filling a 7 gallon glass wine carboy in under 3 hours.

Try opening that restrictor on the waste line fully to see how it goes. If that doesn't help, double check the system configuration and proper seating of all your filters, including the membrane.

Milad · #5 05-21-2010, 08:25 PM

well i took the membrane out and it looks brand new
I called the aquasafe guys and one of their managers lives near me and is going to be nice and come out and check out my setup (which is really nice of her)

Ill let you guys know what happens

Milad · #6 05-23-2010, 01:57 AM

Well when she rolled up, she took one look at the drip and said, WOW thats not right. Looks like that should be your waste
then she looked at my waste and said that should be your fresh water!! dammit!!

tested both, waste was 1TDS and output was 12TDS
switched them around, and boom 0 TDS and solid stream. filled my tank up in a few hours

Turns out the water here is really good. Straight from the tap its only about 10-20TDS

mike31154 · #7 05-24-2010, 03:07 AM

Great stuff, nice to hear that you're getting such personalized service from the company.