GraffitiSpotCorals June 24, 2011 June 24, 2011 So I ordered a 100 membrane instead of a 150 which is what I needed. I am guessing if I use it with the wrong flow restrictor its just not going to work as effective and it won't last as long? If anyone has a an extra 100gpd flow restrictor let me know. Also I think I remember hearing something about the 100 gal per day being better to use than the 150, I think it was something like it won't waste as much water or something I dunno maybe I am thinking about something different... I am not worried about how fast the water is made, so if I can just get a new restrictor rather than paying for another ro membrane and get more benifits from the 100 I would rather do that. Someone let me know if it would be better to stick with the 150 though.
FearTheTerps June 24, 2011 June 24, 2011 I know that some of 100 gpd membranes have a worse rejection rate then the 75 or 150. The rejection rate is closer to 90% then the "normal" rate of 98-99%. As far as the flow restrictor, someone else on here was having a problem with them before, can't remember who it was tho. Maybe they will chime in or someone else will remember.
GraffitiSpotCorals June 24, 2011 Author June 24, 2011 Right on seems I have some studyin to do then...
DaveS June 25, 2011 June 25, 2011 Yea, bad news. You'll need the correct flow restrictor for the membrane to achieve its state specs but even the optimum output for the 100GPD membrane is kinda crappy. I know you don't want to lose the money spend on the membrane but in the end you'll spend many times more on the DI that gets consumed to support this membrane. Membranes aren't too expensive and they last for years. DI is cheaper but you'll blow through it quickly. Sorry...
GraffitiSpotCorals June 25, 2011 Author June 25, 2011 Right on I will just grab a new membrane from BRK or something, thanks for the help guys!
F&Fmgr June 25, 2011 June 25, 2011 (edited) fwiw i use 100 gpd mems and go from 100+ppm to 2-4 ppm before the DI. I have four of them in parallel, as compared to my old 650 which only does get 80-90% justto mske sure they sre working, each 100 gpd membrane has its own di chamber with colorr cchange resin. I know theyre working because i check the water before and after the membrane. Whats your line pressure? o and BTW, in a pinch i have used a speed fitting ballvalve on the waste line to pressure the membrane to 60, but you need to have a pressure gauge b/c you be manually tuning the back pressure. Edited June 25, 2011 by F&Fmgr
GraffitiSpotCorals June 25, 2011 Author June 25, 2011 Right on, yea I just picked up a 100gpd flow restrictor from BRK. The pressure is at 55. So if I put the guage before the flow restrictor and turn the valve shut a little bit I can raise it up to 60? If that is right, is that the best number to run the psi at?
F&Fmgr June 25, 2011 June 25, 2011 if its thin film comp(TFC) it works best at 55-65 PSI most max at 125 psi. Sean
GraffitiSpotCorals June 26, 2011 Author June 26, 2011 Ahhh figured it out, the new inline tds meter craped out... Thank god that was a mess, thanks for the help guys. What a day I had the NEW tds meter go bad and a month old avast stirer motor stop turning. Now just to figure that one out.
GraffitiSpotCorals June 26, 2011 Author June 26, 2011 Man avast rocks, they got back to me within a few hours and told me what might be wrong and I got it back running! Yea hopefully bulk reef supply will refund the money or tell me whats wrong with the TDS meter I will call them tomorow.
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now