RODI Shut Off Valve Question

[The Coug]

I’m working on adding a shut off valve to a used RODI system I bought. I’ve seen the plan to add the shut off valve after the last carbon before the RO inlet. I’ve searched but can’t seem to find a definitive answer if I can place the shut off valve on the initial water supply line (before filter and carbon stages) instead. Basically it’s a tight connection and I don’t want to cut out the old tubing it add the valve if I don’t have too. I’m using a garden hose adaptor with around 60 PSI if that makes a difference. Any advice is appreciated!

 

[Albertan22]

 

[Albertan22]

If you put the shutoff at the initial water supply line you will pressurize your carbon and sediment filter. I’m not sure if that’s a good idea or not. In the traditional installation your DI canister gets pressurized without issue though so maybe that’s ok? I can’t help but think they do it the regular way for a reason. An easy solution is to just add some tubing and move the valve wherever you want while keeping it inline between the carbon and RO membrane.

 

[mike550]

If you put the shutoff at the initial water supply line you will pressurize your carbon and sediment filter. I’m not sure if that’s a good idea or not. In the traditional installation your DI canister gets pressurized without issue though so maybe that’s ok? I can’t help but think they do it the regular way for a reason. An easy solution is to just add some tubing and move the valve wherever you want while keeping it inline between the carbon and RO membrane.

If OP puts the shut off ahead of the filters how does this pressurize them? When the shutoff blocks the water supply doesn’t the water downstream of the shutoff simply drain out the back end of the system?

 

[Albertan22]

If OP puts the shut off ahead of the filters how does this pressurize them? When the shutoff blocks the water supply doesn’t the water downstream of the shutoff simply drain out the back end of the system?

No, not unless they are using a solenoid. A standard RODI automatic shutoff operates with a float switch building back pressure in the system then a diaphragm valve triggering when the pressure gets high enough.

 

[SeaJay]

Are these preinstalled on the BRS premium plus 5-stage systems? I was going to install one, but it looks like it already has one. No mention of it in their description.

 

[mike550]

No, not unless they are using a solenoid. A standard RODI automatic shutoff operates with a float switch building back pressure in the system then a diaphragm valve triggering when the pressure gets high enough.

Ah I get what you’re saying. I wasn’t thinking float switch alone. I was thinking of solenoid based system. thanks

 

[The Coug]

I think I’ll just install some extensions for the lines then, I didn’t think about pressurizing the first stage issues. Thank you so much!

 

[Opus]

Ah I get what you’re saying. I wasn’t thinking float switch alone. I was thinking of solenoid based system. thanks

In your defense, the OP never said anything about auto shut off. I have a shut off valve before any of my filters so I can turn mine on and off without going to the main valve.

 

[rcpalmer1]

Are these preinstalled on the BRS premium plus 5-stage systems? I was going to install one, but it looks like it already has one. No mention of it in their description.

BRS has them pre installed on all of there systems I believe. I have one of their value systems and it even had one.