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Mrramsey
01/05/2015, 02:58 PM
So my issue is that I burn through my DI like nobody's business. My incoming TDS is around 330 on the average. Depending on the time of year i range from 6-13ppm after the membranes. This put me in the 96.5% rejection rate in the fine print of the filmtec membrane specs. usually get around 150g of RODI water before needing to replace. I am on city water that is moderately hard.

I have the BRS water saver 150GPD unit that has 2 75GPD membranes. What would I need to do to convert this to the 99% membranes from Spectrapure or what would you recommend? I certainly do not need that much capacity was more concerned with making less waste water. At the time I bought it I was going to do two tanks but have downsized to my 120 (150 total volume).

Thoughts?

Oh and I do not have Chloromines.

SpectraPure
01/05/2015, 03:14 PM
6-13 TDS alone probably isn't the main reason for the quick exhaustion.

We'd need to know what DI resin you are using and what the CO2 content is in the RO water. We have a CO2 Test Kit that can help with the latter:

http://spectrapure.com/Carbon-Dioxide-Test-Kit?filter_name=carbon%20dioide%20test%20kit

Support at SpectraPure

SpectraPure
01/05/2015, 03:17 PM
I forgot to mention that it doesn't matter how fast you are making water (in GPD). The waste to product ratio should be the same. 2x 90 GPD membranes will just make the water faster.

Support at SpectraPure

Upstate GTI
01/05/2015, 03:34 PM
I dont understand why you are burning through DI so fast. I have probably already used 300 gallons of rodi water and my di hasn't even begun to change colors yet. How many stage setup do you have and when is the last time you changed your prefilters or carbon block? You might want to talk to BRS because this doesn't sound right to me.

SpectraPure
01/05/2015, 03:39 PM
Mike-
thought I would chime in here with some thoughts. What DI from who are you running in what configuration?
The reason I ask, is if we take an often used estimate for rough calculation when troubleshooting of about 5000 ppm/gallons per mixed bed (a lot of assumptions here, but bear with me), your 10 ppm (between 6 and 12 you stated) would give you about 500 gallons between changes with only one (1) DI stage. This is why our support is correctly questioning you about chloramines, CO2 or other presences.
As a note, I would reconfigure the two membranes into a standard configuration with an appropriate flow restrictor for your local water hardness to get the most performance out of your DI with our special membrane (the SP tested 99%).
Hope this explains a bit, good hunting. Something is definitely fishy with your DI life (:-))
bruce

Mrramsey
01/05/2015, 04:03 PM
I dont understand why you are burning through DI so fast. I have probably already used 300 gallons of rodi water and my di hasn't even begun to change colors yet. How many stage setup do you have and when is the last time you changed your prefilters or carbon block? You might want to talk to BRS because this doesn't sound right to me.

The unit is a 5 stage 150GPD dual membrane. 10 months old and I have changed the DI 4-5 times. Been that way since I got it.

Mrramsey
01/05/2015, 04:16 PM
Well I know there aren't any chloromines, I confirmed this with my local water company. They use Chlorine. I have been using the BRS Nuclear grade DI resin with the exception of what I just purchased locally yesterday at my LFS.

Let me ask this. Say I do do the CO2 test and there is CO2 present what can really be done about that other than knowing? Truthfully I would be fine going back to a 90GPD unit single membrane. Initially those were the estimates I was using when I bought the unit if I could obtain 500g out of it I would be ecstatic LOL.

The unit is configured with a Sediment filter, then a 5Micron CTO/ 2 Carbon Block, 0.6 micron +1 Carbon Block, 2 membranes then the DI.

I run the unit in flush mode for a couple minutes before making water. When I make water it is usually 25 gallons at a time. I have spoken to BRS about it but they are a fish supply store and not a water specialist read they could never give me a straight answer.

My water pressure is 65psi (dynamic / flowing).

SpectraPure
01/05/2015, 04:18 PM
Ok first thing is first. What is the TDS coming out of your Tap, and what is the TDS coming out of the RO membrane?

Also measure the amount of good water for 1 minute, and then the bad water for 1 minute. use a stop-watch and a measuring cup. I am looking for ML/PM.

Jeremy

SpectraPure
01/05/2015, 04:19 PM
The RO water can be made in a reservoir, and you can degas the water with airstones and a circulation pump. then you can proceed to pump it through the DI. I am not guessing that you have a lot of CO2 present. What is your KH and PH of the tap water?

Jeremy

SpectraPure
01/05/2015, 04:27 PM
My apologies. I missed the tds portion of this for some reason. We still need to know what the waste to product ratio is. My guess is that you need a different flow restrictor.

Also do you know the general hardness of the tap water?
Jeremy

Mrramsey
01/05/2015, 04:39 PM
Ok first thing is first. What is the TDS coming out of your Tap, and what is the TDS coming out of the RO membrane?

Also measure the amount of good water for 1 minute, and then the bad water for 1 minute. use a stop-watch and a measuring cup. I am looking for ML/PM.



OK for 1 minute

RODI - 350 ML (probably closer to 400 because it took longer to flow because the DI canister had to fill)
Waste - 550ML

Incoming TDS 330
After membrane 9 TDS

58 PSI

SpectraPure
01/05/2015, 04:52 PM
That is not enough waste water. the barrel flow restrictor is not good. If you have a 2 way ball valve we can test that theory. Do you have a 2 way ball valve? Also I need numbers for alk, ph, and general hardness.

Jeremy

Mrramsey
01/05/2015, 04:55 PM
The KH is really high at 304.3 Using my API test kit.
The PH is about 7.4 out of the tap.
The GH was 161.1

I just have a valve to turn it on and off

SpectraPure
01/05/2015, 04:57 PM
is that for the flush mechanism? Jeremy

Mrramsey
01/05/2015, 04:59 PM
is that for the flush mechanism? Jeremy

No there is a ball valve before the unit to turn it off all together then there is the flush valve.

The BRS site claims that the watersaver set up reduces the wastewater by 50%.

SpectraPure
01/05/2015, 06:45 PM
Your alkalinity and PH state you have a ton of CO2. Are you sure that the KH is really that high? Also, I do have a solution, but it would be easier to talk on the phone tomorrow. I am outside of business hours right now.

Jeremy

SpectraPure
01/05/2015, 06:47 PM
It does reduce waste water, but what they don't tell you is what the consequence is. Running at half the waste typically means 3-4 times less DI life. Also your membrane is more prone to scale and clog. Open your flush valve slightly. Re-measure the product to waste ratio. You are looking to achieve a 3:1 or a 4:1 ratio. The wasted water will cost much less than your DI replacements. Also, the waste-water can be used for other application. I use mine to fill me washing machine.

Jeremy

jason2459
01/05/2015, 07:02 PM
It does reduce waste water, but what they don't tell you is what the consequence is. Running at half the waste typically means 3-4 times less DI life. Also your membrane is more prone to scale and clog. Open your flush valve slightly. Re-measure the product to waste ratio. You are looking to achieve a 3:1 or a 4:1 ratio. The wasted water will cost much less than your DI replacements. Also, the waste-water can be used for other application. I use mine to fill me washing machine.

Jeremy
I'm curious how it shortens the di life? My TDS after my RO stage is the same running 1 membrane or 2.

Mrramsey
01/05/2015, 07:15 PM
Your alkalinity and PH state you have a ton of CO2. Are you sure that the KH is really that high? Also, I do have a solution, but it would be easier to talk on the phone tomorrow. I am outside of business hours right now.

Jeremy
Thanks Jeremy. Should I just call the main number or do you have a direct line?

SpectraPure
01/05/2015, 07:34 PM
Jason,

Because when you waste more water, more impurities go down the drain. The less water you waste the less impurities down the drain, and more through your DI stages. DI filters are based on ppm gallons. The higher the TDS coming out of the membrane the shorter your DI will live.

Mike,

480-894-5437 ext 3

jason2459
01/05/2015, 07:38 PM
Jason,

Because when you waste more water, more impurities go down the drain. The less water you waste the less impurities down the drain, and more through your DI stages. DI filters are based on ppm gallons. The higher the TDS coming out of the membrane the shorter your DI will live.

Mike,

480-894-5437 ext 3
That's where I'm confused because my TDS is the same now with two membranes as it was with one membrane. Should the TDS after the two membranes be higher? If so I'm wondering if I have mine connected right. I'll have to check it later tonight to double check.

Mrramsey
01/05/2015, 09:01 PM
That's where I'm confused because my TDS is the same now with two membranes as it was with one membrane. Should the TDS after the two membranes be higher? If so I'm wondering if I have mine connected right. I'll have to check it later tonight to double check.
So I am wondering then if my tds will effectively be lower with a single membrane.??

jason2459
01/05/2015, 09:07 PM
So I am wondering then if my tds will effectively be lower with a single membrane.??
I just double checked my connections and it looks right. Supply line to the in on the auto shutoff, to the first membrane, waist line to the second membrane, then the ro water from both membranes spliced together through the auto shut off again to the di. Then single waste line to drain from second membrane.

SpectraPure
01/05/2015, 11:24 PM
How long did you let the membrane run? Jason what is your waste to product ratio and pressure with a single membrane, and then again with a double membrane? With a 400 ml of product water. I would at least need to see 1200-1600 ml on the waste. Then you need to let the system run for a while. This is why opening the flush valve ever so slightly to increase the waste water, but allowing too much waste will decrease the pressure.

Jeremy

jason2459
01/05/2015, 11:54 PM
How long did you let the membrane run? Jason what is your waste to product ratio and pressure with a single membrane, and then again with a double membrane? With a 400 ml of product water. I would at least need to see 1200-1600 ml on the waste. Then you need to let the system run for a while. This is why opening the flush valve ever so slightly to increase the waste water, but allowing too much waste will decrease the pressure.

Jeremy

I just checked tonight the tds in was 279 and out was 7 after the dual RO membranes w/ pressure gage showing a hair over 64 and water temp at 71. I'll have to check the actual amount of waste and good water.

Sorry I don't mean to hijack the thread but I'm also looking at the spectrapure membranes to upgrade to 400gpd as I'm due later this year to swap out the membranes.

Mrramsey
01/06/2015, 11:19 AM
OK so here are the experiments I tried per Jeremy.

My system currently was running at a 1.25:1 ratio of wastewater. I was seeing my TDS into the DI at 10ppm.

Jeremy suggested I open the flush valve a bit to get a higher waste water ratio. I managed to get ~3:1 ratio going with an incoming tds of 302ppm (after it stabilized) and an out going TDS of 4ppm(after it stabilized).

I also tried getting a 4:1 which I did get albeit I was right at the 50psi limits but did manage to get a 3ppm after the RO membrane.

Spectrapure is going to send me one of their flow restrictors to replace the stock BRS restrictor to try to lower my outgoing TDS.

asudavew
01/06/2015, 03:44 PM
Thanks for the info Mike and everyone.

Very helpful.

SpectraPure
01/22/2015, 10:20 PM
You are welcome.

Mike did you get the flow restrictor?

Jeremy

Mrramsey
01/23/2015, 05:42 AM
You are welcome.

Mike did you get the flow restrictor?

Jeremy
No I haven't yet. I wasn't sure if you had sent one. Can you pm me the address you sent it to?

Mrramsey
01/24/2015, 01:38 PM
I just sent you a pm then the mail came. I just got them. I will get them hooked up later and post the results. I have a couple of days before I need to make water.

Mrramsey
01/27/2015, 06:58 PM
You are welcome.

Mike did you get the flow restrictor?

Jeremy
Hey Jeremy... I got the restrictor. I am going to change it out tomorrow. You sent me two sizes to try which should I use and where does it go?

Mrramsey
01/28/2015, 12:34 PM
Here is what I have.

http://tapatalk.imageshack.com/v2/15/01/28/c8a72b8f2a0d64d8366ea90a5b2c37a8.jpg

I assume it would replace the thing called flow 550? Your instructions mention cutting the restrictor?

Not sure exactly what I need to do.

SpectraPure
01/28/2015, 12:48 PM
remove the barrel flow restrictor with the two black pieces on the sides, and replace it with the red one

Mrramsey
01/28/2015, 02:06 PM
Ok installed and running. Made about 3 gallons so far and TDS is 7ppm. Running at about 55psi.

SpectraPure
01/28/2015, 04:08 PM
open the flush valve slightly to try to drop that ro ppm. We may have to trim down the flow restrictor.

Jeremy

SpectraPure
01/28/2015, 04:08 PM
also measure the waste to product ratio again with the new flow restrictor in it.

Jeremy

asudavew
01/28/2015, 04:32 PM
So I am following along.

I just installed a 99% SpectraPure RO filter and new flow restrictor. I have a BRS deluxe unit.

I was able to drop my output RO water from 17 to 8 before hitting the DI.
I have my restrictor cut at 2 inches. The pressure is steady at 50 psi. (I have a pump.)
My tap water is 450-460.

I would love to get it lower than 8, but if that' the best I have still doubled my DI life. Theoretically.

Thanks for this thread.

Mrramsey
01/28/2015, 04:38 PM
also measure the waste to product ratio again with the new flow restrictor in it.

Jeremy

I had to trim it about an inch just to fit it. I just reduced the bypass a bit. It seems to be holding at 7ppm though.

SpectraPure
01/28/2015, 04:55 PM
Wait? The red tub should have fit in that space in-between the 2 t fittings. I would like to see waste to product ratios from you both. I am looking for ml/pm

Mrramsey
01/28/2015, 07:23 PM
Wait? The red tub should have fit in that space in-between the 2 t fittings. I would like to see waste to product ratios from you both. I am looking for ml/pm
It was jus an inch maybe too long. I will test it tomorrow to get the wastswater ratio.

jason2459
01/28/2015, 07:54 PM
It was jus an inch maybe too long. I will test it tomorrow to get the wastswater ratio.
Probably would have been better to add length to the other side with the shutoff as the length effects the flow restriction.

SpectraPure
01/30/2015, 01:05 AM
Oh you had to cut an inch off. OK well as soon as I have your ml/pm on the waste and product I can help fine tune your systems.

Jeremy

Mrramsey
01/30/2015, 06:32 AM
Oh you had to cut an inch off. OK well as soon as I have your ml/pm on the waste and product I can help fine tune your systems.



Jeremy


Yes, I would have kinked the line a bit if I had not trimmed it a little. I will get the measurements today.

asudavew
02/04/2015, 11:03 PM
Currently my water supply is 500 and ro water Is 18. That's a 96.4 rejection rate.

One minute Measurements:
waste water = 820 ml
Ro water = 175 ml
So ratio is 4.69 to 1.

Any tips to get TDS lower?

SpectraPure
02/05/2015, 11:32 AM
What is your current pressure?

Jeremy

Mrramsey
02/05/2015, 12:11 PM
Ok Finally getting around to testing again.

1 minute results:

RO/DI : 400ML
Waste : 850ML

This is using the Red restrictor that I had to cut 1" off of.

SpectraPure
02/05/2015, 12:18 PM
Mike,

How much is left on the red flow restrictor?

Jeremy

SpectraPure
02/05/2015, 12:19 PM
pull the flow restrictor out of the tube and tell me how long the tail is

Jeremy

Mrramsey
02/05/2015, 12:26 PM
I just cut the red tube... the restrictor (the little blue part has about 3/16" of a little white tail.)

Mrramsey
02/05/2015, 12:28 PM
HAHA I bet you are going to tell me I put the wrong one in.

I said red because of the red tube. I just noticed the green tube has a red restrictor

SpectraPure
02/05/2015, 12:29 PM
what is your water pressure?

SpectraPure
02/05/2015, 12:29 PM
is your system 1 or 2 membranes?

SpectraPure
02/05/2015, 12:31 PM
I sent you the wrong one! Doh. open the flush valve until you achieve a 4-1 ratio again, and I will send the right one over. I foolishly sent you a 90 gpd flow restrictor. For some reason I did not see the picture above before...Sorry partner.

Mrramsey
02/05/2015, 12:36 PM
Yep 2 membranes 75gpd each. Water pressure is 54psi. Almost due for a filter change.

150gpd is way more capacity than I really need. That's why I had mentioned in here somewhere about just converting to a single membrane.

SpectraPure
02/05/2015, 01:01 PM
It's up to you. I personally would like the 2 membranes in case of having to make water quickly.

Jeremy

Mrramsey
02/05/2015, 01:16 PM
True . So which restrictor are you sending?
Also do you carry the filters that will fit this unit?

asudavew
02/05/2015, 08:57 PM
My water pressure is 50

reelredfish
02/05/2015, 09:15 PM
Sounds like they are getting you taken care of. I have this same unit and was having the same issue. So people recommended that I had a membrane not seated all the way. So I messed with both of them but nothing. Turns out I had to contact BRS since it was a new unit and they sent me one new membrane. Then I just had to figure out which one was faulty brand new.

Guessing one of them had a pin hole or something in it. Cause once I swapped th efirst one out it was good to go.

Now just to help increase my life span I have now added a extra pre filter and a second DI unit as well. I really like the current setup and it seems to work really well.

asudavew
02/12/2015, 09:24 AM
I could still use some advice Jeremy.
I have the SpectraPure 99%, 90GPD RO membrane.
Pressure = 50-55.
Water supply TDS = 500
RO water TDS = 18.
Thatís 96.4% rejection.
Waste water = 820ml/minute
Ro water = 175ml/minute
So ratio is 4.69 to 1.
I have the 90GPD flow restrictor cut down to about 2 inches.

This membrane is currently performing worse than the BRS membrane I replaced it with.

Any ideas?

SpectraPure
02/12/2015, 09:41 AM
asudave,

Are you local to AZ? Either way. how long have you had the system ,and how often do the sediment and carbons get change?

SpectraPure
02/12/2015, 10:42 AM
Dave,

There are a few tests that we need to run. We need to test the TDS coming out of each blue tube off of each membrane. If you don't have a hand held meter you can disconnect the probe on the TDS meter and hook it directly off each membrane. You could kill two birds with one stone, and do them both at the same time.

Once we have done this. We also need a ball valve. The second test we will be running is measuring the TDS coming out of each membrane with an independent waste-line with a 4:1 ratio. This will also be done with the probes on each of the product lines. Make sure that you document pressure in each test, tds on each membrane product, and verified 4:1 ratio. Higher in this case would not be better. Your pressure is low, and below the operating specification.

A booster pump would do wonders for your life!

Jeremy

asudavew
02/12/2015, 10:54 AM
I change my filters after 6000 gallons have flowed through the system.
I've had my setup for about 1 year.
I have 1 membrane.
And I have a booster pump.
But I lost a bunch of pressure when I trimmed my restrictor.
I'm about 600 miles from Arizona.

SpectraPure
02/12/2015, 10:55 AM
So I am following along.

I just installed a 99% SpectraPure RO filter and new flow restrictor. I have a BRS deluxe unit.

I was able to drop my output RO water from 17 to 8 before hitting the DI.
I have my restrictor cut at 2 inches. The pressure is steady at 50 psi. (I have a pump.)
My tap water is 450-460.

I would love to get it lower than 8, but if that' the best I have still doubled my DI life. Theoretically.

Thanks for this thread.

ASUdave,

I might remind you that this membrane is doing twice as good as your BRS membrane. From 17 TDS to 8 is double the DI life, granted it is not 99% you are out of operating specifications to achieve 99% With a booster pump we can get you 99% home.

Jeremy

asudavew
02/12/2015, 11:19 AM
It's not running at 8 anymore.
That's what im trying to figure out.

I have a booster pump.

I lost half my pressure when I cut the flow restrictor.
Maybe I cut it too short.

SpectraPure
02/12/2015, 12:18 PM
Chlorine damage would be my guess. What micron rated pre-filtration are you using?

SpectraPure
02/12/2015, 12:19 PM
ok, get a ball valve and put it on the wasteline. Choke it off to 3:1. then report back

asudavew
02/12/2015, 02:08 PM
i have two 1 micron filters, then a carbon block filter, and then another filter with catalytic carbon. I just changed them all 2000 gallons ago.

My municipality has chloramines.

I have a valve. I'll choke it down to 3 gpm and see what it does.

Thanks!
\

SpectraPure
02/18/2015, 11:35 AM
Any update? Are you good now?
bruce

Mrramsey
02/18/2015, 02:40 PM
I sent you the wrong one! Doh. open the flush valve until you achieve a 4-1 ratio again, and I will send the right one over. I foolishly sent you a 90 gpd flow restrictor. For some reason I did not see the picture above before...Sorry partner.

Hi Jeremy, I received the new Restrictor. I hooked it up and testes the waste water to Good water.

Waste 1500ml per min
RO 250 ml per minute

If I do my math correctly that's 6:1. I will run it again just to be sure.

Actually more like 1600 to 240

SpectraPure
02/18/2015, 03:31 PM
whats the tds coming out of the membrane?

Mrramsey
02/18/2015, 05:15 PM
13 tds

SpectraPure
02/19/2015, 01:54 PM
What is the pressure?

JEremy

asudavew
02/20/2015, 01:04 AM
I can't get better than 96% rejection. I've messed with just about everything.
Pressure in. Increased discharge. Decreased discharge.

I just can't get any better than. 96.

Mrramsey
02/20/2015, 06:14 AM
What is the pressure?

JEremy
Right at 50psi

SpectraPure
02/20/2015, 10:43 AM
We need to run another test. Please go to Lowes and get a 2 way john guest ball valve. It will look very similar to your flush valve. Put it after your flush mechanism, and close it a little bit. We need to get you to 900-100 ML of waste water versus the 240 of product. Our specs on the membrane are 60psi with a 250 tds feed, and a soft water source.

Once we get the waste ratio correct the rejection should fall into place ifthe membrane doesn't have chlorine damage. Chlorine damage happens from inadequate carbon pre-filtration, not changing your carbon when it has exhausted, or due to an extremely high amount of chlorine being used to pre-treat your water.

Let me know if you and go get a ball valve.

Jeremy

Mrramsey
02/21/2015, 08:33 AM
Hey Jeremy,

I will try to get a valve today but the weather is pretty crappy here today. I really should change my prefilter, it's looking pretty dirty. Not real sure when to change the carbon blocks out but I have really only put a couple thousand gallons at most through the system.

SpectraPure
02/24/2015, 02:31 PM
Well a couple of thousand could be a lot. Is that a couple of thousand product gallons or total gallons?

Jeremy

Mrramsey
02/24/2015, 03:05 PM
Total

SpectraPure
02/24/2015, 03:40 PM
Are you using BRS standard 5 sediment, 5 micron carbon, and 0.6 micron carbon?

Jeremy

Mrramsey
02/24/2015, 03:41 PM
Yes

SpectraPure
02/24/2015, 03:59 PM
Mike,

I have chlorine test kit for 5.50 on my website. This will tell you when the carbon blocks need to be replaced. If chlorine damages the membranes it starts to fail. By the membrane failing it causes short DI life. I also would like to get you the correct flow restrictor as well. I should have done the flow restrictor differently. We have pre-set flow restrictors that are ballpark flow rates. I have an adjustable flow restrictor that we will use to fine tune your system.

The last piece of the puzzle would possible to add a booster pump. With increased pressure we can make RO water at lower TDS. This causes DI life to extend.

SpectraPure
02/24/2015, 04:05 PM
I can't get better than 96% rejection. I've messed with just about everything.
Pressure in. Increased discharge. Decreased discharge.

I just can't get any better than. 96.

Lets get you a chlorine test kit. When you choke down the pressure on the waste there is a fine balance between psi and ratio. We need to make sure that we have the highest pressure we can with more waste water. We don't want to create excessive waste water, but to optimally run your system there is this "sweet spot". PM me your shipping info

Jeremy

Mrramsey
02/25/2015, 06:49 AM
Hey Jeremy, I can up my pressure but I need to get a sediment filter first Imy pressure was reduced because its getting dirty.

Let me know what I should order and I'll go to your site and get it ordered today .

SpectraPure
02/25/2015, 11:33 AM
oh...lol. When is the last time you changed all of your filters? OK what is the pressure when you remove the sediment filters. I feel like a path of light has just shown upon us!

Jeremy

SpectraPure
02/25/2015, 11:34 AM
im guessing also that contributed to the extremely high waste. water as well. Take the sediment out. Re-measure product to waste ratio, and document psi, and TDS of Tap,RO, and DI

Jeremy

Mrramsey
02/25/2015, 12:52 PM
oh...lol. When is the last time you changed all of your filters? OK what is the pressure when you remove the sediment filters. I feel like a path of light has just shown upon us!

Jeremy


The unit is just about a year old and still running with the stock filters and carbon blocks. Thats why I am wondering if I shouldn't just start off fresh.

When I use the stock BRS restrictor I get 58-59psi with the sediment filter removed. 50-52 with the filter in.

When I use the restrictor you sent me (the grey one) I get a much lower 48psi with the sediment filter removed. It was about 42 with the filter in.

I'll take a stab in the dark and say I have made 6-700 gallons of product water over the last 11 months. even at 3:1 that would have been only about 2800 gallons of water through the sediment and carbon blocks.

I have also just increased my municipal water supply to 70psi which gives me 62psi with the stock BRS flow restrictor in place and the sediment filter removed.

SpectraPure
02/25/2015, 01:14 PM
Your carbon blocks are probably plugged as well. Take those out to see if the pressure increases more.

Jeremy

Mrramsey
02/25/2015, 01:24 PM
Your carbon blocks are probably plugged as well. Take those out to see if the pressure increases more.

Jeremy

OK with no filters at all and just the stock BRS flow restrictor I am at 66psi.

Mrramsey
02/25/2015, 02:10 PM
Just doing some tests without the filters in place.

BRS Stock Restrictor - 2.11:1

The Grey Restrictor - 8:1 @ 55psi
The blue Restrictor - 2.66:1 @ 62psi
The orange Restrictor - 1.76:1 @ 64psi

SpectraPure
02/25/2015, 02:50 PM
what are the membrane TDS value for each?

Jeremy

Mrramsey
02/26/2015, 05:10 PM
what are the membrane TDS value for each?

Jeremy
Busy day today I will try again tomorrow.

SpectraPure
02/26/2015, 09:57 PM
It happens. get a 1/4 double push ball valve from Lowes. I would say lets talk on the phone, but for people whom are tagging along will benefit from this.

@ASU

Hey partner email me your info so I can send you a chlorine test kit.

Jeremy

asudavew
02/26/2015, 10:46 PM
I'll order a chlorine test kit from the website. I don't expect you to have to send me one. I bet your right about the chlorine break through.

I guess it would be best to test the water after the 2 carbon blocks, before the RO membrane?

Mrramsey
02/27/2015, 07:40 AM
It happens. get a 1/4 double push ball valve from Lowes. I would say lets talk on the phone, but for people whom are tagging along will benefit from this.

Jeremy

No Problem Jeremy. I am assuming that you want to use the ball valve on the restrictor side of things to fine tune the wastewater ratio correct?

Also given that the age of my sediment filter is about a year old I am going to replace that right away and may just do the others as well and start fresh since there are a lot of factors that are playing into this.

I think I will add an additional TDS meter on the incoming water as well.

SpectraPure
02/27/2015, 09:48 AM
Changing the carbon blocks is critical as well . I will provide links

SpectraPure
02/27/2015, 09:49 AM
ASU,

Just test the water coming out of the waste line. This will prevent you from having to disconnect anything.

Jeremy

Mrramsey
02/27/2015, 01:21 PM
Hi Jeremy,

I added a valve after the restrictor. I am using the Grey restrictor you sent me. I ran unit with my filters in it and got 6 TDS. I also checked the incoming tds and got 315 TDS which puts me in the ballpark of 98% rejection.

I also tested the waste water ratio and got ~3.85:1 @ 60psi which should keep me at about 132GPD which should be about 4 hours to fill up my reservoir.

The measurements were ~350ml Production and 1350ml Waste. I think we are on the right track here but I will wait for you to confirm.


UPDATE:
-------------------------------------------------------------------------------
I let the unit run for 4-5 minutes to see where the numbers actually settled.

TDS IN: 300 ppm
TDS OUT: 4

That's 98.6999% rejection

http://mramsey.homeip.net/img/RODI_MOD.jpg

asudavew
02/27/2015, 03:36 PM
That's awesome Mike! I'd love to see 4tds.

I ordered a chlorine kit and another ro membrane.
I will change the carbon filters before I install the new membrane.

Mrramsey
02/27/2015, 03:58 PM
The real test will be to see how long the next batch of DI resin lasts. But to be safe I am ordering new filters and carbon blocks.

asudavew
02/28/2015, 12:39 AM
The real test will be to see how long the next batch of DI resin lasts. But to be safe I am ordering new filters and carbon blocks.

at 4 TDS the Di should last forever! ::bounce2::bounce2:

Mrramsey
02/28/2015, 06:51 AM
at 4 TDS the Di should last forever! ::bounce2::bounce2:

Well I am skeptical still but it should certainly last 2 - 3 times longer for sure. I was only getting about 150 gallons of product water before exhausting the DI when I should have been theoretically hitting 4-500.

Going to order new filters and DI today.

Mrramsey
03/21/2015, 08:40 AM
Update:
I have all new filters and using the the new restrictor with a ball valve just after the restrictor to further adjust the flow I am still at 4-5 TDS after he RO membranes. I also started with a fresh fill of DI. I have processed about 32g of RO/DI production water and the Color changing DI is now a golden color about an inch from the bottom.

SpectraPure
03/23/2015, 10:56 AM
Thanks for the update and your efforts to share your results.
bh