is ro/di slow to produce quality water?
- Thread starter reg828
- Start date
Unless you bought a Mega unit you probably only get 35-75 gallons every 24 hours. For more on this read [rodifaq].
bankspower
New member
I just got my compact reefkeeper 75 gpd from Air Water & Ice going the day before yesterday and the output is very slow imo, but as you can imagine the incoming water temp is very low up here in North Dakota in the winter. It's putting out less than 1gph.
keeperofthefish
New member
You may also have low water pressure coming in. Get in touch with AWI and maybe they have a suggestion. You could use a pressure pre-pump to help increase production.
bankspower
New member
I may give them a call to see what they have to say, but in the manual I got with the system it states that for every degree below 72 degrees F output will be decreased by approx 1.3%. So if my water is 40 degrees my output will be decreased by 41.6%. Take that from the max output of 3gph at proper input pressure and I can expect 1.75gph, and I'm only getting about half that much. Not much I can do about the temp I guess, but maybe a boost pump would help out.
Shawn
Shawn
its all a matter of prospective . . .
yes, it seems slow when you're trying to fill up a container for water changes, etc . . .
but as a victim of my own stupidity having flooded my apartment a couple times, i'd have to say that when the water's already overflowing, the RO/DI unit sure does work FAST
(or at least not slow enough)
But yeah, I usually can fill a 5 gal storage container in about 1.5 hours . . . a 16 g rubbermaid that i use for WC's takes about 3.5-4 hours to fill
yes, it seems slow when you're trying to fill up a container for water changes, etc . . .
but as a victim of my own stupidity having flooded my apartment a couple times, i'd have to say that when the water's already overflowing, the RO/DI unit sure does work FAST
(or at least not slow enough)But yeah, I usually can fill a 5 gal storage container in about 1.5 hours . . . a 16 g rubbermaid that i use for WC's takes about 3.5-4 hours to fill
What you can do for the input line is buy an extra 20+ feet from an improvement store and run it through a bucket of water that is heated to say 80 deg C with an aquarium heater. That will help production during the winter.(Courtesy of
Melev's Reef )
Melev's Reef )
bankspower
New member
I thought about that, but space is a little bit restricted under the kitchen sink for extra 5 gallon pails. Maybe I'll buy a pressure gauge and see if i need a booster pump.
Sorry about hijacking the thread, should've started my own.
Shawn
Sorry about hijacking the thread, should've started my own.
Shawn
atkinsg
Chemist/Software Dev
I think the original question had to do with the speed of producing ro/di compared to ro alone, and if it is OK to use ro without the di.
The ro production is the rate limiting step here. Removing the di from the process will not increase output.
Is it OK to use just ro? Sure.
The ro production is the rate limiting step here. Removing the di from the process will not increase output.
Is it OK to use just ro? Sure.
Shawn:
Tap into both your cold and hot water line. Then put a spigot on each line, then "Y" those 2 line together, into your RO/DI. That will allow you to control the temp as it enters your RO/DI. This way you can custom set your water temp right up to the recommended 76F. Once you have it set, leave it there. Before using again, turn your main faucet on to bring the hot water up the pipes. Once it's there, turn it off and turn on your RO/DI.
bankspower
New member
Jim,
That's not a bad idea at all. Is there any worry about getting nasties from the water heater, or will the ro/di take care of those too? Another potential problem would be temp regulation. The hot water starts out at about 180 degrees(dangerous, i know), and after everyone in the apartment building takes showers, does laundry, etc. it's down to 130 or so(guestimate). I guess if its mixed out for 75 with the hottest water, the worst that could happen is it get slightly colder at times throughout the day. Thanks for the advice. It's definitely slow, I had it going all day today, for 13 hours, It put out around 9 gallons.
Shawn
That's not a bad idea at all. Is there any worry about getting nasties from the water heater, or will the ro/di take care of those too? Another potential problem would be temp regulation. The hot water starts out at about 180 degrees(dangerous, i know), and after everyone in the apartment building takes showers, does laundry, etc. it's down to 130 or so(guestimate). I guess if its mixed out for 75 with the hottest water, the worst that could happen is it get slightly colder at times throughout the day. Thanks for the advice. It's definitely slow, I had it going all day today, for 13 hours, It put out around 9 gallons.
Shawn
purelyh2o
New member
JimR
JimR
BINGO!!
That is the correct way to handle a temp issue
A bucket with a heater would be a good idea given no source of hot water but with a hot water source available the absolute best option is to T a hot water line with a mixing valve to tune it to between 75 to 80 degrees. Be careful however that you use a hose that can handle the heat. Otherwise it will rupture and a hot water disaster is BAD!!
JimR
BINGO!!
That is the correct way to handle a temp issue
A bucket with a heater would be a good idea given no source of hot water but with a hot water source available the absolute best option is to T a hot water line with a mixing valve to tune it to between 75 to 80 degrees. Be careful however that you use a hose that can handle the heat. Otherwise it will rupture and a hot water disaster is BAD!!
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