Auto run RO container fill

Why would ro or di water have an impact? I would think it would react LESS than tap water, given the lack of ions present to react with the surface of the fitting.
 
You're on the right track...

It's because the ions have been stripped away that pure, or ultrapure water is aggressive. We call DI water "dissolve anything water."

RO water, and even more so DI water will corrode through a copper pipe for example.

Russ
 
Is there a source for this? I've been googling and haven't come up with anything. I've found a whole lot of posts on forums from people using various cheap ebay solenoids to control their rodi systems, but nothing about this.
 
The Buckeye Hydro website...

Now if you are using a solenoid valve to control the feedwater - that's just tap water - so none of these issues of compatibility apply.

Russ
 
No, all three will be controlling ro water before the di. Two will feed to waste, one will feed to di. The description of the ones I purchased to not specify the composition of the fittings in them, but in the pictures they're silver, so I'm assuming stainless steel or aluminum. Since my last post I have found more data on the corrosivity of ro and di. From what I've read so far, it's a product of the tds of the water, where less than a certain amount is corrosive, within a certain range is neutral, and greater than a certain amount will scale. I haven't been able to find those thresholds though, and I think it might matter because the ro water my system produces before the di is >0.
 
We're not just interested in the composition of the fittings - its ALL wetted components that is the issue here. Including the shading ring, etc.
 
So, except for the risk of future leaking from the solenoids, since the only product water solenoid valve I have is before the di, the di should remove any .05 tds or whatever caused by leaching from the ro wetted metal portions of the solenoid, correct?
 
I just looked again at the one I posted it specifically states that it is suitable for RO. But I have decided that I don't need one at the very start of the system I will see if I can take it apart and see what the valve is made of.
 
That was a lot of good reading in that post, thank you for the link. My ".05 tds" was a number fabricated out of my head, but I still feel like it might be accurate. The only true way to know, I guess, would be to discern the exact rate at which the metal ions leach in the ro water for the metal parts of the solenoid, and the overall effect it would have on tds. I feel like it would be an extremely small quantity at any given point though (with no evidence to support that feeling) and that a di stage would remove it.
 
Redman88 said:
I just looked again at the one I posted it specifically states that it is suitable for RO. But I have decided that I don't need one at the very start of the system I will see if I can take it apart and see what the valve is made of.
Click to expand...

let us know what you find out as i have the same ones
 
Standard plastic electromagnetic valves for RO system is very good selection. But need some electrical trick for low heating it in continues mode.
 
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