Nice way to save your DI

[sirrealism]

So I noticed that with as much water as I make I am going trough my DI pretty fast. I have A second RO membrane so I make water at about 8g per hour so I run 2 DI filters to make sure I get 0TDS. So I notice when I first start it I am getting anywhere from 40 to 45 tds out of my RO and after about 30 seconds it down to 4 tds before my DI. So my train of thought is my DI is being used up A lot when I first start the system. So I put a T with a small hose and a valve and another valve before my DI so when I start my system I am discharging the RO water before the DI untill my TDS gets down to 6. then I turn the 2 valves and send it through my DI. I believe i am getting about 50% or more life out of my DI because of this very simple set up. Thought I would share.

 

[aguila88psi]

Good idea, but you shouldn't be getting anything more than 0tds after the di resin stage

 

[CrazyEyes]

No what I think he is saying is this, when you first turn on the ro unit the tds coming from the ro membrane is always going to be higher, just from it sitting around, usually around 40-45 tds. So instead of letting the DI get rid of 40-45 ppm, he has a valve on there that stops it from going into the di. After the ro unit is running it will flush everything and then bring the tds back down to 6ppm,(after the ro unit). He then opens the valve up so the di resin only has to handle 6ppm instead of 40-45, therefore not burning through di resin as quickly.

 

[rogergolf66]

Yup they sell these flush kits. Not a new idea but good u posted for people that didn't know this already

 

[CrazyEyes]

That's the word I was looking for, thanks.

 

[aguila88psi]

Oh.... Guess my RO unit does the preflush and every 2hrs autoflush for 10-15s to clean membranes automatically

 

[rogergolf66]

Oh.... Guess my RO unit does the preflush and every 2hrs autoflush for 10-15s to clean membranes automatically

Nice. What unit is it?

 

[aguila88psi]

Vertex puratek 100 with extra membrane, scored a used system for super cheap

 

[Travis1787]

Yea rob at faois hooked me up with one of those flush kits roger is talking about, it was like a year or 2 ago. Deff saves the life span on the DI resin ... just let it run to drain for a few seconds after ya first kick it on and then flip it back to run through the system and your set

 

[spicytuna]

This is a really great idea! I have a 5 stage brs chloromines plus system with the flush kit. I always run the flush until my tds drops in the beginning of using my system. I do know the flush is meant to save the membrane, not so much the Di. Some of that high tds water still makes it's way to the resin, but your idea completely bypasses that. What a cheap fix, will def do this, this weekend.

Also, what's everyone's starting tds after the membrane? My tds climbs as high as 160ppm then drops down to 7-8ppm.

 

[sirrealism]

Thanks spictuna. I had no idea there was a flush kit so I just made something to do it. As far as your tds going as high as 160 I would think your filters are old?. Maybe. I noticed mine was going up "135 at start" and all I had was a new sediment filter. I took all filters out and gave them a good rinse. Put the new sediment filter in and I ma back down to 45 at start. I wonder what is your TDS before your system? I ask because I get mine down to 3 before DI after about 3-4 gal. My tap water is about 275 TDS but have heard about some with 350 tds tap water