ro/di

bullock111 · 01/05/2019, 07:26 PM

Really newb question. How do I tell when my filters in the ro/di unit need changed?

bertoni · 01/05/2019, 07:50 PM

The DI cartridge (if there is one) should be replaced when the TDS starts rising. The other canisters generally should be replaced every 6 months or so. I'd check the before and after TDS from the membrane now and then. That's the only practical way to check how well it's doing.

bullock111 · 01/05/2019, 09:38 PM

I am at 0 tds but the sediment filter just looks really dirty. I am on a well

bertoni · 01/05/2019, 10:05 PM

Hmm, you can track the rate of water production. Once that starts dropping, the cartridges are plugged. I might replace the sediment filter now, just on general principles, and watch the output rate in the future.

mann1139 · 01/06/2019, 05:46 AM

I am also going from well->DI ,and I can tell you it is sometimes a chore.

I have 2 sediment filters for that purpose.That helps the sediment filter from clogging too quickly.

If you think it is clogged, turn the water off, unhook the tubing from the next stage and then turn the water on and see how much flows.

Turn the water off, remove the sediment filter, and see what the flow is. If it is reduced, change the filter.

outssider · 01/06/2019, 06:22 PM

sediment filters are cheap....if it looks bad...change it....maybe buy by the dozen/case....At least you don't have to fuss with the carbons much....being on a well there isn't going to be chlorine/chloramine to worry about....

bertoni · 01/06/2019, 10:30 PM

I'm not sure how bad the filters are, but using two sediment filters might be a good idea if the water has a large amount of particulates. Usually, the carbon phase does second duty, but some situations require another approach. A vendor might be able to help you.

Adamantium · 01/11/2019, 09:06 AM

Get a pressure gauge after your sediment filter. When that starts dropping, it's probably time to replace it.

hkgar · 01/11/2019, 02:41 PM

Quote:

Originally Posted by bullock111

I am at 0 tds but the sediment filter just looks really dirty. I am on a well

If you are on a well you will likely burn through DI resin. It is a result of high CO2 in well water. I degass my well water and improved from the DI resin life from 4 months to 14 months.

01/05/2019, 07:26 PM	#1
bullock111 Registered Member Join Date: Jul 2012 Location: maryland Posts: 55	ro/di Really newb question. How do I tell when my filters in the ro/di unit need changed?

01/05/2019, 07:50 PM	#2
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	The DI cartridge (if there is one) should be replaced when the TDS starts rising. The other canisters generally should be replaced every 6 months or so. I'd check the before and after TDS from the membrane now and then. That's the only practical way to check how well it's doing. __________________ Jonathan Bertoni

01/05/2019, 10:05 PM	#4
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Hmm, you can track the rate of water production. Once that starts dropping, the cartridges are plugged. I might replace the sediment filter now, just on general principles, and watch the output rate in the future. __________________ Jonathan Bertoni

01/06/2019, 06:22 PM	#6
outssider Registered Member Join Date: Nov 2009 Location: Reseda, Ca. Posts: 1,717	sediment filters are cheap....if it looks bad...change it....maybe buy by the dozen/case....At least you don't have to fuss with the carbons much....being on a well there isn't going to be chlorine/chloramine to worry about.... __________________ Please don't feed the bears because the bears will become dependent on free handouts and forget how to take care of themselves …... Current Tank Info: 75 Gal. Mixed reef mostly sps

01/06/2019, 10:30 PM	#7
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I'm not sure how bad the filters are, but using two sediment filters might be a good idea if the water has a large amount of particulates. Usually, the carbon phase does second duty, but some situations require another approach. A vendor might be able to help you. __________________ Jonathan Bertoni

01/05/2019, 09:38 PM	#3
bullock111 Registered Member Join Date: Jul 2012 Location: maryland Posts: 55	I am at 0 tds but the sediment filter just looks really dirty. I am on a well

01/06/2019, 05:46 AM	#5
mann1139 Registered Member Join Date: Dec 2007 Location: Jersey Posts: 178	I am also going from well->DI ,and I can tell you it is sometimes a chore. I have 2 sediment filters for that purpose.That helps the sediment filter from clogging too quickly. If you think it is clogged, turn the water off, unhook the tubing from the next stage and then turn the water on and see how much flows. Turn the water off, remove the sediment filter, and see what the flow is. If it is reduced, change the filter.

01/11/2019, 09:06 AM	#8
Adamantium Registered Member Join Date: Sep 2018 Posts: 21	Get a pressure gauge after your sediment filter. When that starts dropping, it's probably time to replace it.