RODI Setup

Daza · Sep 12, 2017

Hi All,

I have been given a 4 stage RODI unit but it has no pipework between each filter and was wondering if anyone can help me with a diagram.

It is similar to this

one.

.

It has 2 filters, stage 1 & 2 then a 3rd for DI resin then the membrane, it also has a booster pump and a pressure gauge.

I am not sure what order all these parts should go in, i've looked on google but the pipework just seems to go everywhere.

Any help would be much appreciated.

Thanks.

clippo · Sep 12, 2017

with the unit pictured, water from your mains supply goes into where the red stopper is inserted - that is the sediment prefilter. Water then goes into the middle pod which is the carbon filter (make sure you take the plastic wrapping off the filters). It then goes into the booster pump. When it leaves the booster pump water travels to the inlet of the RO membrane (the intake on the right hand side in the pic). There are two lines coming out of the membrane - 1 goes to waste (attach your waste water pipe to the port that has the black plug in it in the pic). The 'product' water goes through a high pressure switch then loops back along the rear of the unit and goes into the clear pod which is the DI stage. Pure water from the DI stage then goes to your reservoir coming out of the port plugged with the blue plug.

I believe the pressure gauge should go between the carbon filter and the pump as this allows you to detect when they are getting blocked.

moseley75 · Sep 12, 2017

+1 on What clippo said except the pressure gauge. If you only use one gauge, imho, you should use it to set the inlet pressure for the RO membrane. RO membranes have an optimum working pressure of 55 to 65 psi. For them to to work at peak efficiency you want to set the water pressure entering the membrane for that range. Also if you use the booster you should install a pressure switch so it only runs when your supply pressure is below 55 psi.