RO/DI unit making 30 GPH at 2ppt?

[mbarber87]

So i recently purchased the 200gph upgrade kit for my RO/DI unit. I assembled it according to the videos, and am getting ~60ppt in and ~2ppt out.

The issue I am having is that with the upgrade kit, I'm not getting much waste water and the 2ppt out is outputting at around 30GPH. Something SEEMS wrong but the numbers are confusing me. Any thoughts?

 

[nereefpat]

Do you mean gallons per day? And parts per million (ppm)?

 

[mbarber87]

Yes, sorry lol

 

[Saltyreef]

Youll want to calculate your waste to product ratio and then adjust your flow restrictor accordingly.
4:1 is recommended for longevity of your membrane.

 

[nereefpat]

So, your feed water TDS is about 60. That's good, and pretty low compared to many places. TDS of 2 after the DI isn't terrible, but it should be about zero if the DI resin isn't exhausted. So I would replace the DI resin/cartridge.

For the production speed: I'm not familiar with upgrade kits. 30 gallons per day is pretty slow.
Do you know what the pressure is on the water feeding the unit? Rate of production, I believe, is mostly due to feed pressure and type of RO membrane.

Maybe Russ @Buckeye Hydro can walk you through it.

 

[Potatohead]

How much pressure going into the membranes?

 

[Saltyreef]

So, your feed water TDS is about 60. That's good, and pretty low compared to many places. TDS of 2 after the DI isn't terrible, but it should be about zero if the DI resin isn't exhausted. So I would replace the DI resin/cartridge.

For the production speed: I'm not familiar with upgrade kits. 30 gallons per day is pretty slow.
Do you know what the pressure is on the water feeding the unit? Rate of production, I believe, is mostly due to feed pressure and type of RO membrane.

Maybe Russ @Buckeye Hydro can walk you through it.

Sounds like hes mesuring before and after the membrane. I didnt see him mention final product water tds.

 

[nereefpat]

Sounds like hes mesuring before and after the membrane. I didnt see him mention final product water tds.

Could be. If that's the case, then the RO is filtering 97%, which is good.

The rate should be much faster though. It could have something to do with a flow restrictor, as you said.

 

[Buckeye Hydro Verified Sponsor]

Be happy to get things squared away with you. Give us a call when you are in front of the system!

Russ
513-312-2343