Question about RO unit

rjbesch · 03/01/2009, 09:04 AM

I recently purchased a used RO unit and it was in need of all new filters/membrane. I was told by several people i need to run water through the system with the new membrane. No problem, but my question is i have been told different amounts of time to let the water run. I have been told 4-5 hours before i start collecting water and i have also been told that an hour would be plenty of time, so I am looking for some advice as to what will work, if an hour is good i would rather do that, any help is great, Thanks

drparker · 03/01/2009, 09:13 AM

Mine has instructions to waste the first 3 to 5 gallons after a filter change. So that's an 1 hour to 1.5 with my 75 GPD system.

bsbarton · 03/01/2009, 09:31 AM

Agreed with the 3-5 gallons. That is what mine said also.

dwd5813 · 03/01/2009, 09:43 AM

install the prefilter and carbon and then flush for about 15-20 minutes then install the membrane and di resin and throw away the first 5 gallons it makes. the 5 gallons could take about an hour depending upon the pressure you're running at.

mmedeiros2 · 03/01/2009, 02:01 PM

The Specture manual states to let 2 gal. of product water flow before collecting water. Also let the unit run for at least 10 min. if it has not been used for more than a few days. (Stale water)

ehutchby · 03/01/2009, 02:46 PM

I agree...

03/01/2009, 09:04 AM	#1
rjbesch Registered Member Join Date: May 2008 Location: Hartsville, SC Posts: 96	Question about RO unit I recently purchased a used RO unit and it was in need of all new filters/membrane. I was told by several people i need to run water through the system with the new membrane. No problem, but my question is i have been told different amounts of time to let the water run. I have been told 4-5 hours before i start collecting water and i have also been told that an hour would be plenty of time, so I am looking for some advice as to what will work, if an hour is good i would rather do that, any help is great, Thanks

03/01/2009, 09:43 AM	#4
dwd5813 Registered Member Join Date: Oct 2005 Location: 813 Posts: 2,827	install the prefilter and carbon and then flush for about 15-20 minutes then install the membrane and di resin and throw away the first 5 gallons it makes. the 5 gallons could take about an hour depending upon the pressure you're running at. __________________ order some golf shoes, otherwise we'll never get out of this place alive. what can i say? in dog beers, i have only had one. - dublo8 Current Tank Info: 40B aiptasia farm

03/01/2009, 02:01 PM	#5
mmedeiros2 Registered Member Join Date: Apr 2008 Location: Dartmouth, Ma. Posts: 452	The Specture manual states to let 2 gal. of product water flow before collecting water. Also let the unit run for at least 10 min. if it has not been used for more than a few days. (Stale water) __________________ One must always be aware for the unexpected. Mike Current Tank Info: 75 gal. / Sump / Skimmer / 65 Lbs. LR / 2 Cleaner Shrimp / Firefish / Bangi Cardinal / Pearly Jawfish / 3 - Yellow Clown Gobies / Yellow Wrasse / Hermits

03/01/2009, 09:13 AM	#2
drparker Registered Member Join Date: Feb 2006 Location: Palatine, IL Posts: 2,652	Mine has instructions to waste the first 3 to 5 gallons after a filter change. So that's an 1 hour to 1.5 with my 75 GPD system.

03/01/2009, 09:31 AM	#3
bsbarton Registered Member Join Date: Oct 2007 Location: Harrison Township Posts: 33	Agreed with the 3-5 gallons. That is what mine said also.

03/01/2009, 02:46 PM	#6
ehutchby Registered Member Join Date: Nov 2008 Location: Mooresville, NC Posts: 133	I agree...