Help with RO-DI...BRS ATO won't work

[coralmojo]

Help...I have a Kent Hi-S RO-DI unit...got from LFS...he says middle cartridge goes to membrane cartridge which goes to final stage carbon cartridge and then out...unlike other units where goes 1-2-3 then membrane...this goes 1-2-membrane-3 (?)...

Anyway, I've watched BRS ATO video a couple times...looks like simple setup...on testing, can't get valve to shut off...I've tracked water flow and should not have any back pressure leak...I've even bought a second shutoff valve package but second won't work either...

Something ain't right...

DrMerle

 

[RokleM]

Are you sure your final stage is carbon, or is it DI? If it's carbon, that certainly sounds like it's hooked up wrong. I can't recall (nor would I understand why) ever seeing a carbon filter as the last stage.

 

[DarG]

<a href=showthread.php?s=&postid=15583644#post15583644 target=_blank>Originally posted</a> by RokleM
Are you sure your final stage is carbon, or is it DI? If it's carbon, that certainly sounds like it's hooked up wrong. I can't recall (nor would I understand why) ever seeing a carbon filter as the last stage.

You would use a carbon filter as the final stage AFTER a DI resin cart if it were for drinking water. The DI resin can have leave a funny taste in the water so the carbon filter would be used as a final stage to take the DI taste out of the water for drinking.

Other than that, like you stated ... it sounds like the final stage is really a DI filter, not carbon. The Kent marine unit mentioned has 3 clear canisters in a row with RO on top. One is prefilter, one is carbon and one is mixed bed DI. So after carbon it would go up to RO and then back down to the DI.

As far as the shut off valve, I dont use that type, I use a powered solenoid, and Im not a filtration expert. But I thought that they also required a check valve in line with the product water line from the RO and that they relied on backpressure from either a pressurized storage tank or a manufal float valve in the storage container. I could be wrong here but ... Do you use a float valve in the storage tank?

If no one else chimes in I am sure that BRS would help you. Ask them about the float valve if you arent using one in the good water storage container.

 

[RokleM]

<a href=showthread.php?s=&postid=15583820#post15583820 target=_blank>Originally posted</a> by DarG
You would use a carbon filter as the final stage AFTER a DI resin cart if it were for drinking water. The DI resin can have leave a funny taste in the water so the carbon filter would be used as a final stage to take the DI taste out of the water for drinking.

That's a different matter. Many drinking water systems with storage tanks have a carbon after the tank, but before the faucet I believe to remove taste yes. However, but this is a reef system with DI. From what I've seen, DI is very rarely used in drinking water systems (and warned against by some). So I'm not sure how that's applicable.

Not sure why the last stage would be carbon in this case. It is very well possible that the DI is being misidentified as a carbon as you mentioned.

 

[DarG]

<a href=showthread.php?s=&postid=15583900#post15583900 target=_blank>Originally posted</a> by RokleM
That's a different matter. Many drinking water systems with storage tanks have a carbon after the tank, but before the faucet I believe to remove taste yes. However, but this is a reef system with DI. From what I've seen, DI is very rarely used in drinking water systems (and warned against by some). So I'm not sure how that's applicable.

Not sure why the last stage would be carbon in this case. It is very well possible that the DI is being misidentified as a carbon as you mentioned.

I agreed with you on the DI being mistaken for carbon. The Kent system has a DI filter in line with the sediment and carbon prefilters, on the same bracket as opposed to a seperate bracket with DI cart as some systems have or as in systems with DI add on. So I believe the DI is being mistaken for carbon by the OP due to the configuration of the Kent system.

I realize it's filtration for a reef system. I only mentioned carbon being used post DI for information sake, not to start an argument or intimate that your advice was wrong. Again, I agreed with you.
Jeez, are you having a bad Monday?

 

[RokleM]

No, not at all and I didn't mean to come across that way. I understood the point you were trying to make, but was more valid towards drinking water systems or ebay specials, not specific to the original poster's question or unit. I just wanted to make sure things were clear and there wasn't any confusion. Again, didn't mean to come off as harsh if I did, I just didn't want side conversation to confuse the original poster.