| Skimmers/Equipment/Reactors Archive Threads about skimmers, auto top off, kalk and calcium reactors, etc. |
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03-19-2003, 11:05 AM
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#1
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
Posts: 20,561
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RO/DI output and brass question.
right now i have a regular water purifier on my system for the daily top off, not an RO/DI. i would like to get one. the problem comes in the fact that my kalk reactor can not handle anything over 8psi or its stirring pump leaks. right now i have a normal brass pressure regulator before the water purifier set to 8 psi.
ok question time: if i put an RO/DI before the pressure regulator, would the brass pressure regulator contaminate the water? does anybody know of an all plastic pressure regulator that can go down to 8psi?
sorry for the long post,
G~
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03-19-2003, 06:07 PM
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#2
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Shark
Join Date: Aug 2001
Location: Fl
Posts: 1,772
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Geoff, I would not put the brass regulator after the RO/DI, but thats just me.
I presume all that you need is a ball valve, am I correct?
Are you using thje typical hose that comes with an RO unit? If so then you can use a John Guest type ball valve fitting to dial back the pressure.
Steve |
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03-20-2003, 07:49 AM
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#3
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Reefless Reefer
Join Date: Jun 2002
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SPC-thanks for the suggestion, but a ball valve will only slow the flow of the water. it will not lower the end pressure of the system. i also feel that it is not a good idea to put brass after the RO unit, but i do not know why. i was also hoping that someone knew of a plastic pressure regulator.
G~
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03-20-2003, 08:12 AM
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#4
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Big Fishy
Join Date: Sep 2002
Location: Greenville, SC
Posts: 565
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I am curious why would a brass regulator be bad? You would be running fresh water through it so it would not corrode like say if salt water was flowing through it. Brass is used for outdoor water faucets and spigots so why would it be a problem. I am just curious as to what basis for not using brass.
Earl
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03-20-2003, 09:45 AM
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#5
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
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digital_dragon-i have no idea either, but it just sounds bad. i was really actually worried if after being DI'ed the water would try and grab ions out of anything metal in the are. that is the only thing i could think of as a potential problem.
G~
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03-20-2003, 12:23 PM
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#6
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Shark
Join Date: Aug 2001
Location: Fl
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Quote:
Originally posted by Geoff
SPC-thanks for the suggestion, but a ball valve will only slow the flow of the water. it will not lower the end pressure of the system. i also feel that it is not a good idea to put brass after the RO unit, but i do not know why. i was also hoping that someone knew of a plastic pressure regulator.
G~
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But it would lower the end pressure of the system if it were placed between the RO and the kalk reactor wouldn't it?
My thoughts about the brass is copper, but I could be wrong.
Steve
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03-20-2003, 12:44 PM
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#7
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Member
Join Date: Feb 2003
Location: Texas
Posts: 96
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The problem with using brass in conjuction with RO is this. When you make RO water you are stripping the metals out of the water, now you are going to run it thru brass. The water will try its best to replace the lost metals by leaching the noble metals out of the brass. Even worse with DI. While its trying to do this it will start to pit the brass fitting. Over time the fitting will fail. I hope this helps
Tpeck
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03-20-2003, 01:02 PM
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#8
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
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SPC-if water is constantly flowing then the ball valve would work. once the back pressure gets to the ball valve then the back pressure will just keep increasing until it reaches the pressure before the valve.
HTH,
G~
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08-09-2003, 06:41 PM
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#9
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Ghost of reefers past
Join Date: Jan 1999
Location: Southern Oregon, Way West of Dimples ;)
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Any updates on the search for a safe pressure valve? I want to archive it but I want more current info , plez, anyone?
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08-09-2003, 10:23 PM
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#10
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Stress Monger
Join Date: Jan 2002
Location: Las Vegas, NV
Posts: 3,186
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Quote:
Originally posted by digital_dragon
I am curious why would a brass regulator be bad? You would be running fresh water through it so it would not corrode like say if salt water was flowing through it. Brass is used for outdoor water faucets and spigots so why would it be a problem. I am just curious as to what basis for not using brass.
Earl
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Brass is a Copper alloy...
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08-09-2003, 11:07 PM
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#11
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
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i am still using my old purifier. i still can not find a plastic low pressure valve.
G~
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