RODI help needed

[Logical_Plan]

It goes past what my meter can show. I thought the flush valve was to backflush to membrane?

There is a small set screw Allen head on top of the pump. Turn it counterclockwise to decrease the pressure. It comes set at max pressure, full clockwise.

 

[Rookums Reef]

If your off the chart with the valve closed, you don't need the booster. And quite possibly something is plumbed wrong. Or is it off the charts with the booster pump running?

The "flush" valve is to flush the membrane with low pressure high flow water. Basically flushing the membrane of permeate from sitting with water in the canisters.

When you close the valve, your supplying high pressure, low flow water to the membranes so they can push the water through the membrane instead of just flowing over the membranes.

It goes off the charts when booster is on. With that being said and the booster off, my noise is gone and pressure is @ 65psi when I close the valve.

 

[Rookums Reef]

Your not supplying proper pressure with the valve open. It should be shut when making water.

Whats off the charts pressure?

And I agree with the carbon block after the RO stage, it's useless. The main point of the carbon block is protect the membrane from harmful stuff like chlorine. Having it after the RO it's doing nothing.

How many psi is that?

as @homer1475 said the flush valve bypasses the flow restrictor to flush. It does not back flush the membrane
Over 100psi, with booster off and valve closed I'm at 65psi.
Russ does not seem to be on here much any more but this is a good information post in the sponsor forum

 

[Rookums Reef]

Do I even need the booster if I'm at 65psi with valve closed?
When I initially hooked this system up, it was just 75gpd. My pressure was 40psi. I thought the 150gpd upgrade kit would help and assumed that I needed the booster pump to increase the psi.

It's been a few years, this is an original
BRS 4 stage, 1 sediment and 1 carbon then to membrane. I did buy this used and maybe it wasn't plummed properly?
I'm assuming I need to switch the 3rd stage so that it's before the membranes?

 

[KStatefan]

80 psi will make the membranes work better (more flow and better rejection). I would use the pump since you have it.

Depending on what your source water is i would either replumb it so it was before the membrane or switch it to a DI and run indivual resin then a mixed bed.

 

[Adrift]

Check out this long video he explains everything about rodi. Melevsreef.com

 

[a.t.t.r]

Not reading the whole thread but your flush valve looks open

 

[Rookums Reef]

80 psi will make the membranes work better (more flow and better rejection). I would use the pump since you have it.

Depending on what your source water is i would either replumb it so it was before the membrane or switch it to a DI and run indivual resin then a mixed bed.

I've got no clue what the water is like here. I wanted to send off a sample of each, what the city has and what I'm making. Just haven't got there yet.

 

[Logical_Plan]

I've got no clue what the water is like here. I wanted to send off a sample of each, what the city has and what I'm making. Just haven't got there yet.

You can typically download a report from the city wastewater dept. They usually publish them annually.

 

[Rookums Reef]

Check out this long video he explains everything about rodi. Melevsreef.com

I've made it through 1:10, my booster isn't where it should be nor the solenoid. Appreciate the link!

 

[Rookums Reef]

You can typically download a report from the city wastewater dept. They usually publish them annually.

I was able to do that, but I've got no idea how to decipher the information provided?