RO/DI question

[midgetwaiter]

Originally Posted by Myka

I may have missed it, but how many GPD is your system rated for? Most RO membranes (Filmtek 50 & 75 gpd and BFS 150 gpd) are 98% efficient which means if the water going in is 100 ppm TDS the water coming out will be 2 ppm TDS when it is new, and that will slowly rise until you need to change it. The Filmtek 100 gpd membranes are only 90% efficient, so if you have the Filmtek 100 gpd this is probably not a good choice for your higher TDS source water.

This is why I don't like the Aquasafe for Alberta water, you burn through DI resin way too fast because the 100gpd membrane isn't as effective.

If the DI you had was brown from the start it might have been packaged badly. DI resin that isn't sealed will pick up CO2 from the air and exhaust it. Sounds like your flow restricor is messed too though, it should shut off the product water when you open it up.

[Treebeard]

The membrane is made my Applied Membranes. It is the M-T1812A100 model rated for 100gpd.

If the water is coming out of the membrane at 20 ppm, can I expect good DI resin to reduce it the rest of way to zero?

Where can I pick up a vertical DI canister?

[hillegom]

This is where I picked mine up, but there are a lot of sellers on ebay that might have them as well.
http://filterdirect.com/index.php?cP...fdb78bb04f5669