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#1
04-07-2008, 02:57 AM
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Your pressure loss using a 1/4 inch line versus 1/2 should be almost the same. Being that friction loss is directly tied to flow rate it seems to me that the flow rate for an RO unit is very small. A 50 gallon per day RO unit delivers about .03472 gallons a minute. This translates to a very small pressure loss regardless of the size of your line.
__________________
250 gal display tank plumbed directly to my wallet 
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#2
04-09-2008, 01:57 PM
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Was running the 1/4" supply line through my sump for a while but abandon because of the pressure drop.
There is merit though in warming the RO. Cutting from here (Aqua-safe) "membranes are flow rated at 77F, 65 PSI and 200 TDS and for every 1F water temperature, the production rate will drop 1.6%"
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#3
01-05-2009, 03:10 PM
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Has anyone come up with more options for heating their supply water since this thread last posted? I just installed my new RO/DI and I was thinking of coiling about 10 feet of 1/4" supply line and attaching an 8W repti-therm heater to it.
Not sure if that will give me enough time to heat the water much...any thoughts?
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Mark...  290g Peninsula Display, 425g total volume. Setup Jan 2013.
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