GPD...What does it stand for?

Son Of Skyline · #1 03-31-2003, 02:45 PM

When looking at RO units, what does GPD stand for? Gallons per day?What does it mean to a buyer? How fast is 1 GPD?

For example, how many gallons of RO water per hour will a 10GPD RO unit fill vs a 50GPD unit?

Thanks in advance..

Delphinus · #2 03-31-2003, 03:35 PM

You got it ... gallons per day.

Although the actual flowrate depends on different variables, but basically when you're talking about a 24 gpd unit or a 50gpd unit you're talking about the size of the membrane. But whether you buy a 24gpd and actually GET 24 gpd when it's on, is going to depend on how old your filters are, and what pressure you run it at, and so on.

My "24 gpd" unit fills a 30g rubbermaid garbage can in about 12-16 hours.

Seriak · #3 03-31-2003, 03:36 PM

I believe, that given the correct pressure and temperature according to the suppliers specifications. A 24 GPD system will produce 24 gallons of water with continual operation every day. Therefore, it will produce 1 gallon every hour. So a 1 gallon would produce 1/24 gallons every hour and a 50 GPD would produce just over 2 gallon per hour. That you are more likely to achieve lower than this as optimal condition never occur in our homes. Who wants to run warm water through their RO and watch there energy bill go thrugh the roof.

Delphinus · #4 03-31-2003, 03:43 PM

Maybe I have a 50gpd unit and didn't even know it. LOL ...

Seriak · #5 03-31-2003, 03:46 PM

Quote:

Originally Posted by Delphinus

Maybe I have a 50gpd unit and didn't even know it. LOL ...

Or I could be completely wrong. And Tony, how dare you beet me to this post by only 1 minute.

Chris

smokinreefer · #6 03-31-2003, 05:37 PM

hey tony, whats your pressure at?
thats an awfully fast output for your 24gpd unit.

my 100gpd unit operates at 60psi and i fill my 30gallon garbage can in ~8hrs.

Aquattro · #7 03-31-2003, 05:42 PM

My 100GPD, when new, filled a 100g vat in almost exactly 24 hours. Pressure was 95PSI, temp was ~ 68F

Delphinus · #8 03-31-2003, 05:45 PM

I don't know ... ????

Just regular household cold water pressure ... ?????

How do I tell if I have a 50gpd unit then? Alls I know is, I bought my RO unit used, I put new filters and whatnot on it, and I thought it was a 24gpd unit but it takes way less than 24 hours to put out 24 gallons.

Delphinus · #9 03-31-2003, 05:46 PM

How are you guys measuring your water pressure?

Aquattro · #10 03-31-2003, 06:47 PM

Quote:

Originally Posted by Delphinus

How are you guys measuring your water pressure?

My unit has a pressure gauge inline.