RODI

[anthonygf]

I have had my system running for around 5 years with a dual membrane setup. My output has been 0tds until recently has gone up to 2tds. I changed both membranes to 100 gallons per day and now my TDS is 14. Why would this happen? Do I need to flush the system first? I also have the three canister DI resin in proper order. Any thoughts or suggestions to help me with this is greatly appreciated. Thanks.

 

[KStatefan]

Where are you measuring the TDS?

 

[Snoopy 67]

Did you get the right flow restrictor for the new membranes?

 

[anthonygf]

Where are you measuring the TDS?

At the output of last DI canister. But my TDS has been 0 for several years. Thanks for your quick reply.

 

[anthonygf]

Did you get the right flow restrictor for the new membranes?

Not sure. But I did use the same 100 gallon per day membrane.

 

[anthonygf]

Not sure. But I did use the same 100 gallon per day membrane.

Did you get the right flow restrictor for the new membranes?

I have the BRS 550 flow restrictor and flush valve recommended for 75 GPD membrane. Looks like I will have to get the 800 model. Thanks for that, I forgot about it.

 

[KStatefan]

At the output of last DI canister. But my TDS has been 0 for several years. Thanks for your quick reply.

Then your DI resin is spent.

 

[anthonygf]

Then your DI resin is spent.

You would think but it is all pretty fresh. I change the resin before it all changes color.

 

[KStatefan]

You would think but it is all pretty fresh. I change the resin before it all changes color.

What is the TDS going into the DI?

 

[anthonygf]

What is the TDS going into the DI?

63. Have a water softener and the TDS to the RO is 479. Without softener TDS is around 750.