03-08-2008, 11:39 AM
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#1
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BIG SMELLY MOD
Join Date: Dec 2004
Location: Livingston Parish, Denham Springs, Louisiana
Posts: 16,860
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Have you ever replaced the RO Membrane?
I was wondering how many of You have replaced the RO membrane in your RO units in the past. Not the other Cartridges just the Ro membrane
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Vince aka VINNIE
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03-08-2008, 11:47 AM
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#2
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spaceman spiff
Join Date: Feb 2006
Location: south of Dimples
Posts: 7,103
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It took about 4 years, but my RO membrane finally stopped rejecting what it was rated at (96%), so I swapped it out.
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03-08-2008, 12:16 PM
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#3
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Big Fishy
Join Date: Apr 2006
Location: Lakeland, FL
Posts: 947
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I do it like 1 time a year for the heck of it, usually though everytime I see TDS I just swap out the filters and not the membrame and it is good.
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03-08-2008, 12:23 PM
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#4
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BIG SMELLY MOD
Join Date: Dec 2004
Location: Livingston Parish, Denham Springs, Louisiana
Posts: 16,860
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I have changed mine in the past, about every 2 years when I was making up lots of water, I was just thinking that we talk about the DI, sediment filter, carbon filters all the time and changing them but never the Membrane,
I have been thinking about dropping the Ro and going to just DI unit, I have used water from a commercial DI before at Kristine's work and like the idea of water on demand. Full pressure and flow
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Vince aka VINNIE
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03-08-2008, 12:41 PM
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#5
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Super Moderator
Join Date: Jan 1999
Location: Southern Oregon, Way West of Dimples ;)
Posts: 21,741
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I changed mine once, Before deciding to go straight DI you want to see what your source waters like, it may load up DI quickly 
__________________
When considering courage in battle, one should remember that there are 2 sides to every conflict.
The heroism of the losing side rarely gets remembered
but we were all husbands and fathers, sons and bros
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03-08-2008, 12:48 PM
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#6
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Big Fishy
Join Date: Feb 2008
Location: Greer, SC
Posts: 568
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My TDS has never been anything but 0, so I've never seen any need to change any of the cartridges in the 2 years I've had it. I don't have a big tank now, so it's probably just not been used enough.
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03-08-2008, 04:37 PM
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#7
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Little Fishy
Join Date: Feb 2006
Location: OHIO
Posts: 473
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I just buy the set for my RO/DI and it has the RO with it so I change it with the rest
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Dave
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03-08-2008, 08:07 PM
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#8
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Big Fishy
Join Date: May 2007
Location: nashville
Posts: 948
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It is usually recomended that you change out your flow regulator when you change your membrane. this is really advisble if you buy a different brand membrane.
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03-08-2008, 09:57 PM
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#9
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Look deeply into my eyes
Join Date: Aug 2001
Location: NW Indiana
Posts: 11,054
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Yup.
Membrane about every 3-4 yrs, regardless of TDS readings,and pre and carbon every 6 months.
DI changed when TDS goes up from regular RO readings.
I'm on a well, and use RO for drinking/cooking(people and all the critters here, canine and avian) so i might be going thru a bit more than most others.
Top off(FO tank)/non tank use RO=5-6 gallons a day
DI topoff for the reef tank=3 gallons daily
Plus W/C made @ 34(DI) + 55(RO) gallons at a time(prob every 3 weeks)
FYI/FWIW
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Jeff
ieSpell-Use it/learn it/live it.If you think you don't need it, you do!
http://www.iespell.com/
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03-09-2008, 12:08 PM
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#10
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Super Moderator
Join Date: Jan 1999
Location: Southern Oregon, Way West of Dimples ;)
Posts: 21,741
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Quote:
Originally Posted by tlgreve
My TDS has never been anything but 0, so I've never seen any need to change any of the cartridges in the 2 years I've had it. I don't have a big tank now, so it's probably just not been used enough.
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You might want to sneak a peek at your sediment prefilter, it might scare you
__________________
When considering courage in battle, one should remember that there are 2 sides to every conflict.
The heroism of the losing side rarely gets remembered
but we were all husbands and fathers, sons and bros
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03-09-2008, 01:41 PM
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#11
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Look deeply into my eyes
Join Date: Aug 2001
Location: NW Indiana
Posts: 11,054
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Quote:
Originally Posted by Doug1
You might want to sneak a peek at your sediment prefilter, it might scare you
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I did that once,(and for chuckles , tried to flush it out to see what it grabbed)
 That was enuf for me 
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Jeff
ieSpell-Use it/learn it/live it.If you think you don't need it, you do!
http://www.iespell.com/
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03-09-2008, 02:37 PM
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#12
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Just some guy, you know?
Join Date: Sep 2005
Location: West of Dimples
Posts: 18,185
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Yep,.. I replaced it, but mainly to get a higher rejection rate one,.. my TDS coming in can top 2,000 in the summer, and the new membrane made a big difference in how long my DI Lasts.
I figure on replacing it about every 2 years.
Whiskey
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Mr. Jive/Dr. Heckyll
And you run and you run to catch up with the sun, but its sinking
racing around to come up behind you again
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03-10-2008, 07:33 AM
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#13
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spaceman spiff
Join Date: Feb 2006
Location: south of Dimples
Posts: 7,103
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2000 whiskey, that's incredible. do you have to chew the water?
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03-10-2008, 08:22 AM
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#14
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Stinky Slimey FEESH
Join Date: Apr 2006
Location: San Antonio
Posts: 1,867
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I change my membrane out every year at least, we live in a very hard water area, and even the flushing membrane kit doesn't help much. When the TDS starts going up to 5 and 8, that's my warning to get it changed! Expensive little things though.
HHC
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You can't kill a fish born to hang.....
135-gal Oceanic reef, MH, PC, Lunar
12-gal Nanocube
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03-10-2008, 09:35 AM
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#15
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Rockin-Roll Mod
Join Date: Sep 2005
Location: Coal Valley Illinois
Posts: 5,381
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Once in 2 years... they will last longer now since we installed a chlorinator on are well.
B~
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Last edited by Brent Cone; 03-10-2008 at 12:24 PM.
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меня зовут Chris 
