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View Full Version : Anything similar to a MaxCap?


degibson84
12/29/2013, 07:58 AM
Do you guys carry anything similar to the MaxCap?

Buckeye Hydro
12/29/2013, 09:05 AM
Sure.

Are you looking for a RODI with two DI stages, or are you just looking for a two DI stage add on kit? OR replacement DI cartridges? Or refills?

Russ

degibson84
12/29/2013, 09:26 AM
Looking for a replacement cartridge for silica buster and maxcap. If you have refill resins for them I could do that route too. I just didn't see the refil resins for silica buster and not sure which resin was equivilant of the maxcap

Buckeye Hydro
12/29/2013, 03:12 PM
Find the Silica Trap here (http://www.buckeyehydro.com/silica-trap-di-resin-cartridge/)

The Max cap is just a separate bed cartridge - Cation resin followed by anion resin. You'd be better off with a mixed bed cart, but if you want separate cation and anion we can make that for you as well.

Russ

degibson84
12/29/2013, 05:55 PM
I run mixed bed resin after the MaxCap and silica buster.

Buckeye Hydro
12/29/2013, 05:56 PM
That's a lot of resin! Do you have high TDS in your RO water?

degibson84
12/29/2013, 05:58 PM
Find the Silica Trap here (http://www.buckeyehydro.com/silica-trap-di-resin-cartridge/)

The Max cap is just a separate bed cartridge - Cation resin followed by anion resin. You'd be better off with a mixed bed cart, but if you want separate cation and anion we can make that for you as well.

Russ

is the silica trap refillable or just the carts?

degibson84
12/29/2013, 05:59 PM
That's a lot of resin! Do you have high TDS in your RO water?

it depends some days it runs at 002 TDS after the membrane sometimes it runs in the 040-060 TDS range

My system runs like this

sediment
carbon
RO
MaxCap
Silicabuster
mixed bed

I was just looking for a way to 1: have cleaner product water and 2. maximize the life of my DI resin

also my membrane is a DOW 75GPD but i can barely make 55 in 2 days. This system has given me nothing but headaches. what would you recommend?

Buckeye Hydro
12/29/2013, 06:04 PM
Hmm. Something is going on. How can your RO water be 2 on some days and 50 on the next? Does your tap water TDS fluctuate a lot?

Russ

Buckeye Hydro
12/29/2013, 06:05 PM
is the silica trap refillable or just the carts?

We haven't been selling refills for that, but we can if needed.

Russ

degibson84
12/29/2013, 06:06 PM
Hmm. Something is going on. How can your RO water be 2 on some days and 50 on the next? Does your tap water TDS fluctuate a lot?

Russ

today tap is 150s-160s last week it was 260s. I honestly think my membrane is bad as it doesn't produce much product water to waste

Buckeye Hydro
12/29/2013, 06:22 PM
Even if your tap is 260 - your RO shouldn't be anything close to 50. That's a rejection rate of only 81%.

When a membrane goes bad it:
produces water dirtier than it should be, and/or
it produces water more slowly that it should given your temperature and pressure.

What is your water pressure at your membrane?

Russ

degibson84
12/29/2013, 06:28 PM
Even if your tap is 260 - your RO shouldn't be anything close to 50. That's a rejection rate of only 81%.

When a membrane goes bad it:
produces water dirtier than it should be, and/or
it produces water more slowly that it should given your temperature and pressure.

What is your water pressure at your membrane?

Russ

the gauge is in the membrane housing and reads about 84PSI

Buckeye Hydro
12/29/2013, 06:38 PM
That's great pressure.

What is your waste water to purified water ratio?

What is your water temperature?

degibson84
12/29/2013, 06:40 PM
never checked the temp it is straight off the cold tap.

haven't checked the exact ratio but my waste line is always flowing very fast to just drips on the product water. It is hard to check the actual volume coming off the waste due to the pressure it comes out at. Very hard to try and collect it

Buckeye Hydro
12/29/2013, 06:43 PM
So if we assume your tap water temperature is 58 F, and you have 84 PSI, and if we use the calculator (see link on our home page), you should be getting 93 gpd, or 3.9 gallons per hour.

Is the membrane old?

And are you sure it is seated (pushed in all the way)?

Russ

degibson84
12/29/2013, 06:53 PM
it is a DOW 75 GPD not sure how it could produce more than the stated volume. It is in all the way as I checked this a few months ago. The membrane was purchased April 21st

Buckeye Hydro
12/30/2013, 03:20 AM
If you play with the calculator a little, you'll see that if you have a combination of pressure and temperature that exceed the factory specs (77 F and 50 psi), the membrane will produce more than 75 gpd.

Buckeye Hydro
12/30/2013, 03:21 AM
How are you measuring the tds or the tap water, RO water, and DI water?

Russ

degibson84
12/30/2013, 03:37 AM
Im using an inline TDS meter

Buckeye Hydro
12/30/2013, 04:23 AM
Presumably with two probes, right?
and those are reading tapwater and DI water? How are you getting the RO water reading?

degibson84
12/30/2013, 12:41 PM
Presumably with two probes, right?
and those are reading tapwater and DI water? How are you getting the RO water reading?

I took the probe out of the output and moved it to just after the membrane. I feel like with the lack of product water I need a new membrane and also a new silica buster since the TDS climbs will going through it.

Buckeye Hydro
12/30/2013, 02:26 PM
You may be right. Or you may have an internal crack in the RO membrane housing. Hard to imagine that a membrane would go bad in less than 1 year - unless you have something in your tap water causing it (manganese? iron?).

Russ

degibson84
12/30/2013, 04:14 PM
should I replace the MaxCap as well? the TDS coming out of that is 007-009. going into it is 002 so I would imagine that is going bad too. or should i just bypass the MaxCap and only run the silica trap and then into the mixed bed

Buckeye Hydro
12/30/2013, 04:19 PM
Yes - sounds like it is shot.

Buckeye Hydro
12/30/2013, 04:20 PM
The real issue here is that you need to get your RO water TDS down. That's your real issue. Once that is under control, a single mixed bed DI cart will likely be sufficient.

degibson84
12/30/2013, 04:21 PM
Yes - sounds like it is shot.what do you think about bypassing the MaxCap and just running the silicatrap then into mixed bed?

degibson84
01/03/2014, 06:18 PM
bought a new membrane and the waste to product is much better but the TDS coming out of the new membrane is not as clean. going in to the membrane is 150 coming out is 010

Buckeye Hydro
01/04/2014, 03:57 AM
Well 10 is much better than 50!

What is the gpd rating on the new membrane?

degibson84
01/04/2014, 12:32 PM
75 god

Buckeye Hydro
01/04/2014, 12:35 PM
Thats a 95% rejection - not great, but not horrible for that membrane.

degibson84
01/04/2014, 12:37 PM
it is a BW60-1812-75 which is supposed to be 99%

Buckeye Hydro
01/04/2014, 01:08 PM
Well, it is spec'ed at 97 to 99%, but in practice it is not unusual to get less than that. What is your waste water to purified water ratio?

Russ

degibson84
07/27/2014, 06:27 AM
still having issues with this setup and have about had it with replacing DI every 2 months.

The RO membrane is brand new again!!! and my TDS coming off of it is 71.

my unit looks is the one at the top of this page
http://www.kentmarine.com/products/ro/

Im starting to think it has something to do with the pressure gauge being on the RO housing. When I pulled the membrane out this morning i see some damage to it right where the guage is.


I'm just feed up with this thing and dont understand why i can't produce any kind of clean water out of the membrane

Buckeye Hydro
07/27/2014, 06:30 AM
Please give us a call when you are in front of the system. We're available by phone today from 8 to 8, eastern time.

Russ
513-312-2343

Buckeye Hydro
07/27/2014, 06:36 AM
still having issues with this setup and have about had it with replacing DI every 2 months.

The RO membrane is brand new again!!! and my TDS coming off of it is 71.

my unit looks is the one at the top of this page
http://www.kentmarine.com/products/ro/

Im starting to think it has something to do with the pressure gauge being on the RO housing. When I pulled the membrane out this morning i see some damage to it right where the guage is.


You may be on to something with your kent system. We can go into detail when we talk on the phone, and a pic would verify, but it is possible to damage the RO element if the gauge is installed incorrectly. If you did damage the membrane that sure could explain the bad rejection.

Russ

degibson84
07/27/2014, 07:14 AM
Thanks for taking my call on a Sunday morning

Here is a picture if the damage to the membrane.

http://i811.photobucket.com/albums/zz32/CLEsportscards/FBCE191A-D323-4C12-AD3B-35B707601811_zpsxwwz3nka.jpg (http://s811.photobucket.com/user/CLEsportscards/media/FBCE191A-D323-4C12-AD3B-35B707601811_zpsxwwz3nka.jpg.html)

Buckeye Hydro
07/27/2014, 07:18 AM
The other thing you may have going on, and I think I mentioned this earlier in the thread, is that you may have an internal crack in the RO membrane housing - allowing waste water to come out of the RO water port.

You'll probably spend more time and trouble trying to diagnose it - may just be time for a new RO housing - they are only about $10.

Russ

degibson84
07/27/2014, 07:39 AM
Ya I think I'm going to just order a new housing and membrane.

What is the difference between the Dow and maxr

Buckeye Hydro
07/27/2014, 09:11 AM
MAXR is a Dow Filmtec membrane but it has a guaranteed 98%+ rejection.

degibson84
07/27/2014, 10:42 AM
membrane must be damaged enough to produce "dirty" water. I took the gauge out and retaped it. When I put it back in the TDS coming out of the membrane was even higher at 80 TDS

Buckeye Hydro
07/27/2014, 11:22 AM
And you are letting it run for several minutes before you take these tds readings, right?

degibson84
07/27/2014, 11:59 AM
Yes. The first few minutes it was at 12-13 the. After that it jumped to 80

Buckeye Hydro
07/27/2014, 01:01 PM
Hmm. Should be the other way around.