Compare RO/DI Units

[intarsiabox]

Originally Posted by albert_dao

The booster pump is to achieve the 1:1 ratio, not to boost PSI...

The Vertex website seem to indicate that the pumps is used to boost low source water pressure. Here is the quote directly from Vertex's website.

"Each Deluxe Puratek RO/DI system is furnished with a Vertex™ HP-100 Booster Pump, enabling the setup to operate at the lowest source water pressures."

Maybe I'm interpreting it wrong?

Out of curiosity, do you still work for Proline (Vertex's distributor)? If so maybe you know the answer to this. I understand that some units use some of the DI water it creates to backflow the membrane and some (probably most) just use pure tap water through the membrane. What method does the Vertex unit use for flushing?

[albert_dao]

Originally Posted by intarsiabox

The Vertex website seem to indicate that the pumps is used to boost low source water pressure. Here is the quote directly from Vertex's website.

"Each Deluxe Puratek RO/DI system is furnished with a Vertex™ HP-100 Booster Pump, enabling the setup to operate at the lowest source water pressures."

Maybe I'm interpreting it wrong?

Out of curiosity, do you still work for Proline (Vertex's distributor)? If so maybe you know the answer to this. I understand that some units use some of the DI water it creates to backflow the membrane and some (probably most) just use pure tap water through the membrane. What method does the Vertex unit use for flushing?

I don't work for them anymore (over six months).

Ignore what the site says. It enables increases in PSI, but is mainly there to improve the water/waste water ratio.

I'm not sure what function is used for the backflush, unfortunately.

[gregzz4]

On the Vertex RODI, it looks like the flush valve bypasses the flow restrictor to flush the membrane, so I'd say it's still using waste water for the flush
The flush is just higher volume past the membrane, so it's not a 'back flush' per se

[intarsiabox]

Thank-you both for the replies!

[chromakey]

Thanks for the information.

I am planning to use for drinking/cooking as well.

Has anyone added a small reservoir tank like the Aquasafe models?

For drinking does everyone use a final polishing carbon filter?
The company mentioned this adds 50/75 ppms of carbon. He didn't recommend using this for the aquarium water.

How do most people tie into the water supply line?

Thanks,

Michael

[mike31154]

I simply installed a JG Y connector & 2 shut off valves downstream of the RO membrane. Close the valve on the line to the DI stage, open the other valve & fill a standard 5 gal water bottle with the line from the RO membrane. Use it for cooking, drinking, making beer/wine etc. I pretty much always wait until I've filled the 5 gal container with RO water before producing DI water. This ensures the TDS out of the membrane has plenty of time to get as low as possible & stabilize. During the summer I generally get 1 TDS out of the membrane, but during the winter with colder water I often get a 0 TDS reading out of the RO. I figure this routine has probably lengthened the life of my DI media.

As far as tying into the water supply, I added a copper tee & ball valve into the cold water line to my washing machine. Reduced & adapted to the RODI size tubing using some JG type parts from Can Tire. Here's a photo;

[Xadieu]

I've been using aquafx unit with no problems at all, it makes more water than I need. I just don't really see the point in spending more money than you need to just to have that brand name when both products achieve the same exact end product, in this case 0 TDS water. If you're buying leds I can see a big discussion on this.