RODI Question / Auto Water change

Aquadicted · 02/09/2012, 11:00 PM

Hello,

My question is, Where does the drain go? If the RODI is shut off via a float valve does that stop the drain also? Does it matter if it has pressure pump?

I'm trying to set up a auto top off/ auto water change system.

This is how I'm planning to run the system:

RODI split and connected to both sump (auto top off) and reserve tank (for water changes)

ATO's will control 2 pumps. 1 - to pump water out and another to pump water in from reserve.

Also do you guys see any issues in my system?

Thank you so much,

username in use · 02/10/2012, 06:33 AM

Its not a great idea to run an RO directly to your sump. If something happens to the float valve, you can dump a whole lot of fresh water into your tank. Better off having a 5-10g container of RO with a little pump connected to the float valve, that way worst case scenario you only drop your SG a little bit and everything survives.

As far as the RO unit shutting off, you need a solenoid valve in front of the RO unit, it will sense the back pressure of the float valve closing and automatically shut off the water supply.

Buckeye Hydro · 02/10/2012, 07:19 AM

I think it was your question I just answered on the other bulletin board!

02/09/2012, 11:00 PM	#1
Aquadicted Registered Member Join Date: Jan 2011 Posts: 14	RODI Question / Auto Water change Hello, My question is, Where does the drain go? If the RODI is shut off via a float valve does that stop the drain also? Does it matter if it has pressure pump? I'm trying to set up a auto top off/ auto water change system. This is how I'm planning to run the system: RODI split and connected to both sump (auto top off) and reserve tank (for water changes) ATO's will control 2 pumps. 1 - to pump water out and another to pump water in from reserve. Also do you guys see any issues in my system? Thank you so much,

02/10/2012, 06:33 AM	#2
username in use Sciencing Daily Join Date: Mar 2009 Posts: 6,560	Its not a great idea to run an RO directly to your sump. If something happens to the float valve, you can dump a whole lot of fresh water into your tank. Better off having a 5-10g container of RO with a little pump connected to the float valve, that way worst case scenario you only drop your SG a little bit and everything survives. As far as the RO unit shutting off, you need a solenoid valve in front of the RO unit, it will sense the back pressure of the float valve closing and automatically shut off the water supply. __________________ Joshua "With fronds like these, who needs anemones?" - Albert Einstein Current Tank Info: multiple nano's sprinkled around the house

02/10/2012, 07:19 AM	#3
Buckeye Hydro .Registered Member Join Date: Sep 2006 Location: Cincinnati, Ohio Posts: 4,857	I think it was your question I just answered on the other bulletin board!