Question about ro/di and ATO

[gobytron]

I'm finally moving away from the aquarium pharmeceuticals tap waer ro/di filter and setting up an automated freshwater top off system.

I use a tunze osmolator but I am going to be setting up a kent float valve hooked up to a 3 or 4 stage ro/di filter.

My question is aside from the ato, the float valve and the filter itself, what other component do I need?

will any ro/di work or do I need to purchase one specifically set up for an automatic top off system?

Links and advice greatly appreciated.
Thank you.

[DiverDude]

You need to be careful as not all RO/DI systems can work with a float valve. The valve just builds back pressure which not all systems can handle.

Just be sure to tell anyone selling you a system that you want it to run unattended on a float valve.

[gobytron]

i was under the impression that a check valve of sorts was attainable to add on to counteract the back pressure?

was I misled?

Thank you very much for the advice.

[hillegom]

You should look into getting a solenoid to positively close the RO. It could use the information from your float valve when to I/O.

[wisesam]

I run my RO/DI directly to my tank with a float valve and auto shut off valve.
There is no problem so far.

[Milad]

i think you need the automatic shut off valve at least
http://www.aquasafecanada.com/aquasafes.html
scroll down half way

i just ordered one, the link above is local to you.