RO/DI just installed

[Lunker]

I have finally got my RO/DI system installed this evening. Please let me know if what I discribe is normal. I have an Ocean Reef +1, 5 stage at 75 GPD from the Filter Guys.

Here is what I've observed thus far:

The pressure gauge reads 40 psi after the third stage

the TDS meter IN reads 14 - TDS OUT reads 0 at the DI unit.

It would appear that the current rate of about 1 gal of RO/DI to maybe about 4 gal of waste water.

 

Does this all sound normal for just installed and should I expect a better ratio of RO/DI to waste as time goes on?

 

Thanks

[Coral Hind]

Everything sounds normal to me.

 

Do not expect a better ratio as time goes on. You can add a booster pump which will raise the PSI and push more water through the membrane to help your ratio but it is not required. Make sure you flush the membrane periodically.

[YBeNormal]

Yep, sounds about right and 4 to 1 waste to product is correct. I'm guessing that the 14 TDS reading is just after the RO membrane, right?

[Lunker]

Everything sounds normal to me.

 

Do not expect a better ratio as time goes on. You can add a booster pump which will raise the PSI and push more water through the membrane to help your ratio but it is not required. Make sure you flush the membrane periodically.

 

Not sure how to flush the membrane yet. So I will have to look into this.

 

Thanks/Ron

 

Yep, sounds about right and 4 to 1 waste to product is correct. I'm guessing that the 14 TDS reading is just after the RO membrane, right?

 

Yes Bob, the TDS - IN reading is taken right after the RO membrane.

 

Thanks/Ron

[jnguyen4007]

Sounds like your RODI is in full operation.

[astroboy]

Not sure how to flush the membrane yet. So I will have to look into this.

 

I've never heard of flushing a membrane, let alone how to do it. Can someone provide some insights?

 

Thanx mucho.

 

Mark

[Integral9]

Not sure how to flush the membrane yet. So I will have to look into this.

 

Simply put, you release the pressure inside the RO unit to allow the water to flow past the membrane rinsing it, instead of through it. If you don't have a by-pass for the flow restrictor plumbed in, you'll have to remove the flow restrictor to release the pressure. It should be on your RO waste line. I'm using a ball valve to restrict my flow (not recommended), so I just open the ball valve all the way to flush the membrane.

 

It's not something that you "have" to do, but it will increase the life of the membrane saving you money in the long run.