hook RO/DI to the sump

[wisesam]

Hi,
I am looking to add RO/DI filter and an auto top-off.
I kinda want to hook up the RO/DI directly to the sump with a float valve.
So when water drops, the float valve opens to allow filtered water into the sump.
But I have read some people advise against doing so because it may cause disaster if failed.
Has anyone done such similar setup?
Any advise is appreciated.

[mark]

I'm doing direct using a humidifier float valve from HD and been trouble free for coming up 3 years. Yes, there's a risk but I balance against all the people that have had their basements flooded because their furnace humidifier failed, (personally I never have). Never cleaned the valve either as figure it's always being flushed by ro/di water.

Will also hear of TDS creep but can't say I've noticed solely due to my setup. My TDS will eventually rise after 6 months or more but figure just time to change the DI anyways.

The only negative I have is the line from my ro/di Tees to the sump and also to a storage container. When filling up my container for making water, get a slight drop in the sump due evap (since the ATO is effectivly bypassed). Might drop a gallon in my 75g sump.

[Captainhemo]

You can also put a 2nd float above the 1st and have it as a backup/failsafe so should your 1st float stick or fails in some manner, your water will still shut down.

[wisesam]

Cool, I feel more assuring now.
The double float valve is a good idea.
Has anyone had any bad experience on direct hook up from RO/DI to sump?

[mark]

Originally Posted by Captainhemo

You can also put a 2nd float above the 1st and have it as a backup/failsafe so should your 1st float stick or fails in some manner, your water will still shut down.

Would need something different than a humidifier float valve as no way to connect something to the output.

If wanted something with more redundancy, could easily wire, in series, a whole bunch of float switches tied to solenoid valve.

[Captainhemo]

Someone posted this awhile back, lots of good stuff
http://autotopoff.com/

[new but handy]

hey I use a humidifier float valve with no problems