HELP!!! My RO/DI unit isn't working :(

ChiefnReefer · 12/21/2011, 12:07 PM

I just replaced the sediment, carbon block, RO membrane, and DI cartridge on my RO/DI unit and its not working correctly. The water comes about an eighth of the way up the DI cartridge and then stops and I get no water except for that running out of the rejection hose. PLEASE HELP! What could be the problem? Could I have packed the resin too tight?

BryanW · 12/21/2011, 12:25 PM

had the same problem, and I had put my resing block in upside down.

ChiefnReefer · 12/21/2011, 12:31 PM

Thats what I had thought at first, but I took it out completely and I had the same problem. It should be installed with the black ring facing up correct? Also, when I squeeze the drain line, the level rises slightly in the DI canister. Does that mean I dont have enough water pressure? or is the RO membrane damaged?

pgammon · 12/21/2011, 12:33 PM

Did you change the flow restrictor? It's a small white fitting in your waste line you trim to achieve a 4:1 ratio. HTH

ChiefnReefer · 12/21/2011, 12:42 PM

I'm not sure whether or not it actually has a flow restrictor...all the drain line has is the elbow fitting that connects it to the RO housing. I assumed it was in the elbow or something. is that possible?

pgammon · 12/21/2011, 12:48 PM

It's in the line that connects to the elbow, pull the line out and you should see it.

ChiefnReefer · 12/21/2011, 12:52 PM

I pulled the elbow out and it doesnt look like there is anything there. just the elbow which seems to be all one piece. what would it look like?

pgammon · 12/21/2011, 12:55 PM

http://www.bulkreefsupply.com/store/...-your-membrane

pscott99 · 12/21/2011, 01:11 PM

Remove each filter one at a time leaving an empty container to narrow down the problem.

ChiefnReefer · 12/21/2011, 01:17 PM

I think i solved the problem. The elbow didnt have a flow restrictor in it, but the line that goes from the RO membrane to the DI canister had a metal piece inside of it, which i assume is the flow restrictor. i swapped the elbow to where the straight connector was and now I'm getting almost exactly a 4 to 1 ratio of drain water to RO water. is that about right? The flow restrictor is now on the drain, and the open one is going into the DI now.

Telaverus · 12/21/2011, 01:21 PM

What make/model is your RO/DI system? I've never heard of a metal flow restrictor, I thought they were all plastic.

ChiefnReefer · 12/21/2011, 01:35 PM

the RO housing has a kent marine label on it. 3 clear canisters under the RO and a black metal mount. looks pretty close to this: http://c3.f3images.com/IMD/250/KM141...-System-99.jpg

12/21/2011, 12:07 PM	#1
ChiefnReefer Registered Member Join Date: May 2011 Location: Champaign, IL Posts: 59	HELP!!! My RO/DI unit isn't working :( I just replaced the sediment, carbon block, RO membrane, and DI cartridge on my RO/DI unit and its not working correctly. The water comes about an eighth of the way up the DI cartridge and then stops and I get no water except for that running out of the rejection hose. PLEASE HELP! What could be the problem? Could I have packed the resin too tight?

12/21/2011, 01:21 PM	#11
Telaverus Registered Member Join Date: Feb 2007 Location: Canada Posts: 212	What make/model is your RO/DI system? I've never heard of a metal flow restrictor, I thought they were all plastic. __________________ Stu Retired 500g system... Researching and building a nice and relaxing 65g display

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12/21/2011, 12:25 PM	#2
BryanW Registered Member Join Date: Aug 2011 Location: SoCal Posts: 106	had the same problem, and I had put my resing block in upside down.

12/21/2011, 12:31 PM	#3
ChiefnReefer Registered Member Join Date: May 2011 Location: Champaign, IL Posts: 59	Thats what I had thought at first, but I took it out completely and I had the same problem. It should be installed with the black ring facing up correct? Also, when I squeeze the drain line, the level rises slightly in the DI canister. Does that mean I dont have enough water pressure? or is the RO membrane damaged?

12/21/2011, 12:33 PM	#4
pgammon Registered Member Join Date: Jan 2001 Location: Eastover, SC Posts: 282	Did you change the flow restrictor? It's a small white fitting in your waste line you trim to achieve a 4:1 ratio. HTH

12/21/2011, 12:42 PM	#5
ChiefnReefer Registered Member Join Date: May 2011 Location: Champaign, IL Posts: 59	I'm not sure whether or not it actually has a flow restrictor...all the drain line has is the elbow fitting that connects it to the RO housing. I assumed it was in the elbow or something. is that possible?

12/21/2011, 12:48 PM	#6
pgammon Registered Member Join Date: Jan 2001 Location: Eastover, SC Posts: 282	It's in the line that connects to the elbow, pull the line out and you should see it.

12/21/2011, 12:52 PM	#7
ChiefnReefer Registered Member Join Date: May 2011 Location: Champaign, IL Posts: 59	I pulled the elbow out and it doesnt look like there is anything there. just the elbow which seems to be all one piece. what would it look like?

12/21/2011, 12:55 PM	#8
pgammon Registered Member Join Date: Jan 2001 Location: Eastover, SC Posts: 282	http://www.bulkreefsupply.com/store/...-your-membrane

12/21/2011, 01:11 PM	#9
pscott99 Registered Member Join Date: Jan 2011 Location: Stratford ON Posts: 241	Remove each filter one at a time leaving an empty container to narrow down the problem.

12/21/2011, 01:17 PM	#10
ChiefnReefer Registered Member Join Date: May 2011 Location: Champaign, IL Posts: 59	I think i solved the problem. The elbow didnt have a flow restrictor in it, but the line that goes from the RO membrane to the DI canister had a metal piece inside of it, which i assume is the flow restrictor. i swapped the elbow to where the straight connector was and now I'm getting almost exactly a 4 to 1 ratio of drain water to RO water. is that about right? The flow restrictor is now on the drain, and the open one is going into the DI now.

12/21/2011, 01:35 PM	#12
ChiefnReefer Registered Member Join Date: May 2011 Location: Champaign, IL Posts: 59	the RO housing has a kent marine label on it. 3 clear canisters under the RO and a black metal mount. looks pretty close to this: http://c3.f3images.com/IMD/250/KM141...-System-99.jpg