RO/DI ?

[Reef-junky]

one of the members here recommended the Aquatic life buddy from Amazon, it says ro system, it that the same as ro/di or do you have to get another cartridge, and will just ro water be good enough, for reef tanks.

They make an RO/Di filter. In fact you can see the DI in the picture. Just the RO is 3 stages it’s 4 with the DI.

 

[White Hair]

Get this, it's only $10 more and works great.

ordered it last night

 

[stacksoner]

You will most likely need a pressure booster pump to have your new setup function properly. I have yet to meet someone whose water pressure is strong enough to not require one.

 

[Reef-junky]

You will most likely need a pressure booster pump to have your new setup function properly. I have yet to meet someone whose water pressure is strong enough to not require one.

Not sure what your talking about tap water from the city is between 45 to 80 psi. Most RO’s only need 50 to 80 psi. I’ve never had to use a booster pump.



BRS

Spectrapure

 

[Reef-junky]

And as far as using bottled water. When I lived in Napa valley the city water plant bottled their own water. They don’t have to do much at all to water to bottle it. You better know what your adding or it will come back and bite you. There is no way if you are running an RO/Di filter properly that bottled water is cleaner. Even a crappy RO/Di filter is going to have a 95% rejection rate compare that to an ion or cross flow filter.

 

[W1ngz]

You will most likely need a pressure booster pump to have your new setup function properly. I have yet to meet someone whose water pressure is strong enough to not require one.

Hi, nice to meet you.
There. Now you've met someone who doesn't need a pressure booster.

 

[stacksoner]

Not sure what your talking about tap water from the city is between 45 to 80 psi. Most RO’s only need 50 to 80 psi. I’ve never had to use a booster pump.



BRS

Spectrapure

"The typical inlet water pressure to a home is about 40 to 45 psi"
Source: Popular Mechanics, https://www.popularmechanics.com/home/how-to/a1053/4202333/

“When asked directly most of these manufacturers admit that it's just a 75 gallon per day membrane that if you're running at 60 psi with 77 degree water you'll achieve 90 gallons a day. But because most people don't have 77 degree water in their cold water line, you'll probably need 65 or even 70 psi to achieve the claim. More or less this is just a shell game and I think it’s kind of deceptive because I'm pretty certain less than 10% of the reefers out there have 70 psi at home and they won't be able to achieve the marketed flow rates”

Source: BRS Investigates RODI Pressure:

Good day, sir.

 

[SDK]

A membrane exactly equaling its GPD rating is meaningless to me vs. having the purest source water I can get, verified by an inline TDS meter.

Many things in this hobby are "rated" with specific unrealistic/optimistic conditions applied.

A short list would include return pump GPH ratings, tank size recommendations for heaters, coverage areas for lights, etc...

It is not really a deal breaker or big revelation that you may not get exactly what a membrane is rated for based on your individual circumstances...

 

[JoshH]

You will most likely need a pressure booster pump to have your new setup function properly. I have yet to meet someone whose water pressure is strong enough to not require one.

While we haven't met in person there are a bunch of people who's incoming pressure is more than adequate for water production. Mine is 85-90 PSI into the unit, but low pressure is definitely a common problem for people.

 

[homer1475]

You will most likely need a pressure booster pump to have your new setup function properly. I have yet to meet someone whose water pressure is strong enough to not require one.

Hi!
Thats 2 people now you have met that don't need a booster pump. My incoming pressure is 74PSI. When I drop to 60PSI, I change out my first 2 stages. I certainly do not get anywhere near the "rated" GPD out of my system, but thats only because my water is super cold up here in the NE.

 

[Salty Lemon]

Get this, it's only $10 more and works great.

I used the RO Buddie for years before I installed my big RODI unit. It worked great.

 

[Reef-junky]

"The typical inlet water pressure to a home is about 40 to 45 psi"
Source: Popular Mechanics, https://www.popularmechanics.com/home/how-to/a1053/4202333/

“When asked directly most of these manufacturers admit that it's just a 75 gallon per day membrane that if you're running at 60 psi with 77 degree water you'll achieve 90 gallons a day. But because most people don't have 77

degree water in their cold water line, you'll probably need 65 or even 70 psi to achieve the claim. More or less this is just a shell game and I think it’s kind of deceptive because I'm pretty certain less than 10% of the reefers out there have 70 psi at home and they won't be able to achieve the marketed flow rates”

Source: BRS Investigates RODI Pressure:

Good day, sir.

Funny the pressure at the last two places I ran RO/DI was 65 and 70 psi.

Residential Water Pressure Explained

Learn how residential water pressure is generated, what the pressure should be for most homes, and what you can do to fix water pressure problems.

www.plumbingsupply.com

How to Boost or Improve Poor City Water Pressure

Improve bad city water pressure: How to increase municipal water pressure & flow at a building How to boost water pressure by adjusting the pressure regulator How to boost water pressure by installing larger diameter piping How to boost water pressure by installing a water pressure booster pump...

inspectapedia.com

What you quoting even says 50psi and even tells you how to turn it up. Where they are wrong is saying it shouldn’t be over 60psi. The max pressure you can safely go depends on your house set up and pipes. I suspect they don’t want to get sued for some turning the pressure up to high and causing damage. They also assume the pressure is set low to begin with which is also wrong.

I

 

[ScottB]

I am on a well. With the "old" well pump I needed an enormous pressure tank and still needed a booster as I was only about 40PSI.

When it failed, I replaced it with a constant pressure pump that keeps a steady 71 PSI going in.

 

[Reef-junky]

[QUOTE="slewrock1Source: BRS Investigates RODI Pressure:

[/QUOTE]

Did you even watch the video? They explain the temperature and pressure. You do know you can calculate the rejection rate your self right? He ran the filter at 30psi and 71F water and got a rejection rate of 96% he even talks about the fact that the water temperature is not 77F. You also threw out the manufacture using a 7:1 waste ratio which he also mentions in the video. When he’s talking about a shell game he’s talking about membranes with high production rates like 90gpd. He said that a 90gpd membrane is a 75 at a higher pressure which is stated in the specs.