RO setup question

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Hi, so I have one of those white RO systems with the two filters hanging below, and the two horizontal canisters above.

My question is regarding the bigger horizontal canister, it has a connector on one end for the incoming feed, and then 2 outgoing connections on the other end.
One of these 2 connectors looks like it has some sort of valve in it.
is this the drain connection, or the good water connection?

Thanks
 
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Drain. Valve is to flush membrane to keep clean
Thanks, but just to clarify, I am not talking about the on/off valve, which is for the drain.
But which outlet on the membrane does that connect to?
 

viper357

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One of these 2 connectors looks like it has some sort of valve in it.
is this the drain connection, or the good water connection?
Easiest way to tell is to plumb the unit in and run it, the pipe where the water comes gushing out is the drain and the one where the water dribbles out is the RO water.
 

viper357

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Maybe this pic will help

 
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Yep, that's it, the check valve in the elbow.

Gee, is that the RO outlet, how long does it take to fill an 800 litre tank?
 
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And the drain water is just waste?
Or should it be re-routed again?
 
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Oh wait, must the drain tap be closed while filling up the tank?
Possibly a stupid question!
 
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yes...but its not a top if a flow restriction flush valve, so even when "closed" water will come out
 

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