Rodi question

[qchau]

Need help from the expert Rodi guys out there. I bought a used bulk reef 5 stage Rodi unit. The guy I bought it from said the ro filters are 6 months old and the di resin needs replacing. When I ran the unit the ro coming out was at 2 tds but it looked like a slow drip. The pressure gauge was at around 70 psi. Do you think I need to change the filters for the ro section since the water coming out seemed so slow?

I know the di section needs to be changed because the tds coming out is 15.

 

[qchau]

I just figured out the issue...the membrane flush was on thus causing the slow flow. Now I'm getting around 90 psi and 1 tds going through the ro......I guess I don't need to change that just yet. The di coming out is at 4 tds so I'm still going to need to change that resin.

 

[Buckeye Hydro]

Hmm. If your line pressure is 90 psi, it sure should have been lower than 70 psi with the flush valve open - assuming everything is plumbed correctly.

Russ

 

[xmas_one]

I'd go ahead and replace the sediment, carbon and DI and call it a day. Obviously your membrane is good if you're getting only 2 TDS off the RO.

 

[Buckeye Hydro]

If you're going to do that - it would be a great time to sanitize the unit - especially because you bought it used. That should be done once a year.

 

[Reefomeez]

I'd go ahead and replace the sediment, carbon and DI and call it a day. Obviously your membrane is good if you're getting only 2 TDS off the RO.

+1...great call