Float Valve pressure

[Brian W]

I hooked up my rodi unit to a 55 gallon barrel with a float valve.
When the water was full the float valve stopped the water from overfilling the container.
When I unhooked the rodi connection to put the hose away there was so much pressure.
My rodi unit has a auto stop brick on it (not sure what its called) and my waste water stopped as well.

Is this pressure in the good rodi water line normal.
Pressure was like a super soaker, lol

 

[EriksOasis]

Yeah it’s normal if you hold your float valve up while making water for a few seconds then release you you see a good amount of pressure. RODI units run properly based on pressure.

 

[Brian W]

Yeah it’s normal if you hold your float valve up while making water for a few seconds then release you you see a good amount of pressure. RODI units run properly based on pressure.

If it stays like this overnight or a few days will it explode or screw up my rodi unit?

 

[EriksOasis]

No from my experience I’ve left my water on to my RODI unit for a day or two without issue.

 

[miPapareef]

I’ve left the water on at 75 psi for 9 months now. I do have the auto shutoff valve but the whole system stays pressurized. It’s not a problem.

 

[Brian W]

No from my experience I’ve left my water on to my RODI unit for a day or two without issue.

thanks

 

[Brian W]

I’ve left the water on at 75 psi for 9 months now. I do have the auto shutoff valve but the whole system stays pressurized. It’s not a problem.

thanks

 

[Forsaken77]

I hooked up my rodi unit to a 55 gallon barrel with a float valve.
When the water was full the float valve stopped the water from overfilling the container.
When I unhooked the rodi connection to put the hose away there was so much pressure.
My rodi unit has a auto stop brick on it (not sure what its called) and my waste water stopped as well.

Is this pressure in the good rodi water line normal.
Pressure was like a super soaker, lol

It'll take a toll on the cheap auto shut-off kit over time because your pressure skyrockets well past normal operation for the unit (don't know if you have a pressure gauge). I have had water start to leak out of the top of the canisters after a whiile of leaving it pressurized. It could also leak from any of the 10 cent fittings. I also have good pressure to begin with and don't need a booster pump. It also depends on what the pressure is when it's built up. The parts wear down through usage. That's like running the system 24/7.

The comment above says that his pressure goes up to 75psi. Mine is 70 psi normally, so is in the 90's with the pressure built up.

But just to play it safe, don't leave it like that continuously. I mean a few hours or overnight once every so often is no big deal but the parts do wear down, especially the O-rings on the canisters. So when your unit shuts down, shut the water off, go to your barrell and press the float switch down into the water to release the pressure. Usually while holding the float down, and all the extra water comes out to make the pressure 0 again, I will close the valve leading to the can of water. So that when I release the float back up, it won't suck water back into the DI resin. That step isn't really necessary because you should have check valves installed, but I do it anyway.

Remember that they're all cheap parts and the O-rings will start to leak after a while regardless and need to be replaced. With the water source still on and all that pressure built up, it could be a flood. Btw... BRS sells a tube of DOW Filmtec O-ring lubricant that will make any O-rings last much, much longer. The O-rings get flattened out after a while and water leaks from the top of the canister. This stuff helps prevent that.