RI/DI problem

[KrazyKuch]

Originally Posted by Coleus

I also sense the water flowing into my membrane is on short continuously pulse if i touch it

whats the water pressure like before your RO/DI?

[mark]

pulsing might be due to the check valve and ASOV

[Coleus]

Originally Posted by KrazyKuch

whats the water pressure like before your RO/DI?

it has been always 70 psi

[Myka]

0.01 ppm? You're worried about that? I wouldn't be. However, I would be checking TDS after RO membrane before DI resin. When is the last time you changed the DI resin? Did you have the system apart at all or did this problem start on its own? Does it normally drain down in the DI chamber when you shut it off and refill when you initially turn it on or does it always remain full?

[Coleus]

I just changed the DI resin like 1 week ago, The problem just start yesterday, before it was find and I flush the membrane for 10 minutes the last time i used which was a week ago

It does normally drain down in the DI chamber half way and then refill when turn it on again.

[Myka]

Hmmm...mine does that too (draining DI chamber down partially) ever since I changed the DI resin. Before I changed the DI resin it didn't drain down. I refilled the DI cartridge that came with the system (AquaFX). I never did figure out what the problem was, and it has continued to happen ever since. I didn't pay attention very closely when I removed the cartridge since I didn't realize it is refillable I was going to toss it and use a different refillable cartridge. When I noticed the AquaFX one is refillable I refilled it, and put it back in. I thought that maybe I didn't put it back right or I dropped an o-ring or something, but I have no idea. It is almost like some of the water is somehow bypassing the filter. I really just don't get how it does it...I think it is sucking air in from the RO waste line when the system is shut off, but I haven't actually tested that theory. I can't think of any other way for air to get in there, and the water to get out. I also don't get any TDS so that doesn't make sense either. I sent photos and the same question to AquaFX and although they tried to help neither of us could figure out the problem. Since I get 0 TDS from it, I just ignore it.

[mike31154]

The DI chamber in my BWI 75gpd 5 stage system has never filled up since day 1. I get 0 TDS out so I don't sweat it. Sometimes it gets about half full after I've opened one of the pre filter housings or if I've run just RO for drinking water for a while. Doesn't take long to almost empty out once I start running the DI again though. I've read a few posts here and elsewhere with similar info, some saying it's normal. No clue how it works, but like I said, TDS 0, why worry?

[hillegom]

Maybe you could put a towel under it, slowly unscrew the cannister, until it fills and then retighten.