GPD...What does it stand for? - Page 2

smokinreefer · #1 03-31-2003, 07:05 PM

yup, me too.

Son Of Skyline · #2 03-31-2003, 08:59 PM

Thanks for the replies everyone. I guess I should avoid that Kent 10gpd unit unless I feel like waiting 12 hours for 5 gallons.

Aquattro · #3 03-31-2003, 09:14 PM

Quote:

Originally Posted by Son Of Skyline

I guess I should avoid that Kent 10gpd unit unless I feel like waiting 12 hours for 5 gallons.

Exactly. My first unit was a 24 gpd and the waiting killed me. I can do a 5g jug now in about an hour and a bit.

ed99 · #4 03-31-2003, 09:32 PM

I get just over 25 gpd off the tap here in Calgary with my 25 gpd rated RO unit. As mentioned in earlier posts the pressure and temperature of the water will affect the throughput. Warmer temperatures will mean higher throughput but also more slippage of the impurities you're trying to get rid of. Higher pressure will also give higher throughputs without hurting performance too much, but the membrane may not last as long if the pressure gets too high.

Delphinus · #5 03-31-2003, 11:09 PM

I must have a 50gpd unit then. I repeat my earlier question, how do I tell what membrane I have? Is there some kind of rule of thumb I can use, i.e., length or width of the RO membrane? (It's just some Kent RO unit. Note it's not RO/DI, I don't know if that changes things. Paid maybe $75 for it. I didn't think I'd get such a good deal that it'd be a 50gpd unit for that kind of coin.)

zulu_principle · #6 03-31-2003, 11:30 PM

Why not just use DI water, RO seems like overkill especially if you are heating, and letting the saltwater mix properly.

golden69_ca · #7 04-01-2003, 03:22 AM

Delphinus if your it is truly a 24gpd ro you could have a rupured membrain our it could be in backwards . with filling a 30gal in 12 to 16 hours if everything was working tip top youd be at least a 60 gpd if not larger .

EmilyB · #8 04-01-2003, 03:25 AM

My in-line pressure gage here in Calgary has always read about 42psi.
Next time I am at Brad's I 'm going to have a shower.

Jack · #9 04-01-2003, 03:32 AM

I can get 82psi out my tap but I was told my membrane is rated for 80psi so I try to keep in a tad under.

MitchM · #10 04-01-2003, 01:23 PM

Tony, I've bought membranes before that said 25 gpd on the outside of the box, but the label that the bag that the actual membrane is in says 50 gpd.
I don't think that there is any indication what the rating is on the membrane cartridge itself.
Maybe you can tell a difference from the number of "wraps" of the membrane tissue or something....I dunno....

Mitch