What kind of RO system do you run????

[Goldcoastreefs]

At what pressure do you run your system at?

 

[Capt_Cully]

Don't have a guage. Just household pressure. Never been an issue, but I see where you're going with it. Higher pressures would wreck it much sooner as would higher temps, correct?

 

[Goldcoastreefs]

Nope, Most ro membranes are most effecient from 65-75 psi. In my case I am getting 45 comming from the city so I run a booster pump boosting it up to 65. This will help the membrane get rid of more so the Di has less work to do. Plus you make more water with less waste. Should check the pressure. I run the Typhoon Extreem, with a 150 gpd membrane and booster pump with an inline sediment filter before the booster pump.

 

[Buckeye Hydro]

Don't have a guage. Just household pressure. Never been an issue, but I see where you're going with it. Higher pressures would wreck it much sooner as would higher temps, correct?

No sir. Filmtec residential-scale membranes can handle up to 300 psi.

Russ

 

[Buckeye Hydro]

Nope, Most ro membranes are most effecient from 65-75 psi. In my case I am getting 45 comming from the city so I run a booster pump boosting it up to 65. This will help the membrane get rid of more so the Di has less work to do. Plus you make more water with less waste. Should check the pressure. I run the Typhoon Extreem, with a 150 gpd membrane and booster pump with an inline sediment filter before the booster pump.

Hmm. Not to be picky, but there might be some misunderstanding here.

1. RO membranes don't run "most efficiently" between 65 and 75 psi. I think you are thinking about the conditions under which the membranes are tested at the factory. For instance, Filmtecs are tested at 50 psi. Most other brands are tested at 60 psi.

2. If you have a booster pump, by all means take full advantage of it and turn up the pressure. At 65 psi you are not using the pump to your best advantage.

3. While raising the pressure will change the waste water to purified water ratio - you still want to shoot for the proverbial 4 to 1 regardless of your pressure.

Russ

 

[SkiFletch]

At the risk of thread highjacking, a question . What is the effect of using a 75gpd restrictor valve wth a 100gpd membrane? Would you just not be the most efficient, or would it somehow damage the membrane? I ask cause while I have a 75gpd system with 75gpd membrane currently, I just acquired a 100gpd filmtec membrane for free and need to know if I nee to upgrade the restrictor too when my 75gpd finally poops out on me

 

[Buckeye Hydro]

You'd likely end up with less than a 4:1 ratio - how much less depends upon your water pressure and water temperature. You'll probably be fine. Just check the ratio.

Russ

 

[Buckeye Hydro]

Remember however that the 100 gpd membranes have a lower rejection rate than the 75 gpd membranes. Here are the spec's on the 1812 membranes we sell:

Russ

 

[Goldcoastreefs]

Hmm. Not to be picky, but there might be some misunderstanding here.

1. RO membranes don't run "most efficiently" between 65 and 75 psi. I think you are thinking about the conditions under which the membranes are tested at the factory. For instance, Filmtecs are tested at 50 psi. Most other brands are tested at 60 psi.

2. If you have a booster pump, by all means take full advantage of it and turn up the pressure. At 65 psi you are not using the pump to your best advantage.

3. While raising the pressure will change the waste water to purified water ratio - you still want to shoot for the proverbial 4 to 1 regardless of your pressure.

Russ

Yeah bad choice of words on the "most efficently" However taken from the air water ice website, which is the unit I have and sell to my clients "The ideal water pressure for an RO system is between 65 to 75 PSI and thus inceasing by increasing your psi up to this level the more efficient the RO system will be"

With that said, I am running at 65psi becuase that is all I can get out of the pump with the 150 gpd membrane without getting a different booster pump.

 

[Buckeye Hydro]

"The ideal water pressure for an RO system is between 65 to 75 PSI and thus by increasing your psi up to this level the more efficient the RO system will be"

I understand what they're getting at, but as written I'd not ageee with it.

With that said, I am running at 65psi becuase that is all I can get out of the pump with the 150 gpd membrane without getting a different booster pump.

65 psi with that membrane meets the manufacturer's feedwater spec's. Feel free to give us a call if you're interested in getting that pressure higher with your existing pump.

Russ

 

[cbbram]

Vertex 100gal per day... 0 tds

 

[SkiFletch]

So my tds might go up as a result huh? Well worth a try anyway you slice it since it was free

 

[Buckeye Hydro]

So my tds might go up as a result huh? Well worth a try anyway you slice it since it was free

The TDS of your RO water WILL go up, and the life span of your DI resin WILL be shorter - but you'll get water 33% faster.

Russ