|
|
Post by scoobnoob on Sept 28, 2017 20:31:11 GMT -5
So I run a water saver 150 gpd BRS 4 stage unit. Recently the resin is getting used up extremely fast, in like 2 weeks fast. I'm trying to figure out why and look for some solutions. I changed all filters less than a month ago, and the membranes back in march.
1. The pressure recently dropped (they are doing some water main construction nearby I don't know if this is the culprit but I went from 65psi to 60. I changed the sediment filter to see if it was clogged this had no effect. Possible solution booster pump.
2. TDS creep, whenever you turn on your RODI residual TDS gets through before dropping, my in rating is typically 120 or so then drops to 8 after a minute or 2 -solution TDS creep bipass
3. I have an auto shut off kit, I let my system run all day today, when I came back the kit has stopped the water flow, my TDS on the in probe had risen to 172!! A tds bipass would not help with this build up.
4. Its just not enough for the water here, our tap water was 482 tds the last time I tested it, considering adding another carbon block before the membrane and dual DI cartidges after in hopes of extending resin life.
5. Maybe I seated the membranes wrong, I honestly don't think I did, I checked today they are in there pretty firm.
Any solutions suggestions, would be appreciated.
|
|
|
|
Post by ryansweatt2004 on Sept 29, 2017 6:44:05 GMT -5
Checking the membrane is the first suggestion. That said if they’re doing work on a water main nearby then I’d gues that’s most likely the culprit. A booster pump still doesn’t hurt to have though and possibly an auto flush kit for the RO to reduce tds creep.
|
|
|
|
Post by Vijay Glenburn on Sept 29, 2017 7:29:08 GMT -5
I assume the DI resin is packed real tight. Is it possible to get tds values for tap, before RO membrane, after RO membrane and after DI resin? That way you can narrow down where the buildup is happening. I have a half used membrane waiting to set up for drinking water you can borrow to trouble shoot.
|
|
|
|
Post by Vijay Glenburn on Sept 29, 2017 7:35:23 GMT -5
And if it's a new membrane it could be shot. I use a 3 way valve between ro and DI to bleed out for the first 5 mins and then feed to DI. This has helped a lot with resin life and my tds is always 0.
|
|
|
|
Post by scoobnoob on Sept 29, 2017 11:28:49 GMT -5
It has a flush kit. Vijay I ordered one of those valves to setup like yours.
Tds coming in is 387 so if its 97% reduction rate I should have the 8 to 11 tds going into the resin so my guess is the membranes are fine. Its when things get shut off due to auto shut off that it goes to 170 and kills my resin thats my guess
|
|
|
|
Post by nickidml on Sept 29, 2017 16:45:08 GMT -5
Could air be getting in? Maybe via the auto shut off somehow? Carbon dioxide can quickly deplete DI resin.
|
|
