High ppm all of sudden?

[Shirak]

If everything is working correctly you should have around 2-4ppm RO water. Unless your Tap water TDS is through the roof. Then the DI takes off the remaining TDS and drops it to 0.

Do you make small batches of RODI frequently?

 

[Notsolostfish]

If everything is working correctly you should have around 2-4ppm RO water. Unless your Tap water TDS is through the roof.

Do you make small batches of RODI frequently?

Yes to fill my other tank evaporation.

 

[Shirak]

Yes to fill my other tank evaporation.

That could do it.. It's called TDS Creep. When the system is off the TDS on the RO water side goes up. The first half gallon of water out of the RO is high in TDS, It will eat your DI resin up. Flushing the membrane does nothing as it is already on the RO water side. The way to solve this is to make large batches of water infrequently OR put a RO/DI Bypass valve in so you can collect the first 32-64oz of RO water before closing the valve and sending it to the DI canisters.

 

[Shirak]

I would also double check your Tap TDS and the TDS out of the RO section to make sure it's working properly.

 

[DaJMasta]

Yeah that color. How come my DI used up that fast?

It's likely that your RO membrane is bad, or is installed correctly (are you sure the water lines are connected correctly?) DI alone can do a pretty good job removing TDS, but it will not last long when the input water has a lot of crud in it, so it could be that your RODI system is effectively just a pair of DI canisters now, and they only lasted a week as a result.

I would check plumbing, check the internal seal on the RO membrane, and if both appear to be good, contact BRS about a potential faulty unit.

 

[homer1475]

I would aslo look into your source water for chlorine, or chloramines. These will absolutely destroy the RO membrane, which will push high TDS water through your DI depleting it prematurely.

 

[Spare time]

I HIGHLY recommendaking a bypass around the DI resin when flushing every time you turn the unit on. I was burning through DI resin like crazy until someone on here recommended this to me. Now I get months out of my resin

 

[Notsolostfish]

I HIGHLY recommendaking a bypass around the DI resin when flushing every time you turn the unit on. I was burning through DI resin like crazy until someone on here recommended this to me. Now I get months out of my resin

How do i bypass it

 

[homer1475]

How do i bypass it

A 3 way bypass valve put on the line right before the DI, but after the RO.

Something like this will work, and what I use on my system:

3-Way Ball Valve with 1/4" Push Connect

Control Your Water Flow with Ease Versatile 3-Way Design Effortless Flow Direction Control Ideal for Freshwater and Saltwater Systems The 3-way ball valve is a versatile and essential fitting for any saltwater mixing station. With a simple swing of the handle, you can easily turn the water...

www.bulkreefsupply.com

 

[Notsolostfish]

A 3 way bypass valve put on the line right before the DI, but after the RO.

Something like this will work, and what I use on my system:

3-Way Ball Valve with 1/4" Push Connect

Control Your Water Flow with Ease Versatile 3-Way Design Effortless Flow Direction Control Ideal for Freshwater and Saltwater Systems The 3-way ball valve is a versatile and essential fitting for any saltwater mixing station. With a simple swing of the handle, you can easily turn the water...

www.bulkreefsupply.com

Right here?

 

[homer1475]

I'm assuming(can't see the entire unit), that is the line going into the DI stage?

If yes, then yes. You plug the one end from the RO into the 3 way(bottom), one to waste(I use a Y adapter so I only have 1 waste line), and the other to your DI.

When you flush the unit, you send all the water to waste, when TDS comes down while flushing(ideally you want a TDS meter right after your RO membrane), you close the flush valve, then close the 3 way sending water to your DI.

 

[Chrisv.]

I’m all for forum based trouble shooting, but brs has excellent tech support for rodi systems in particular. Why not give them a call?

 

[Notsolostfish]

I'm assuming(can't see the entire unit), that is the line going into the DI stage?

If yes, then yes. You plug the one end from the RO into the 3 way(bottom), one to waste(I use a Y adapter so I only have 1 waste line), and the other to your DI.

When you flush the unit, you send all the water to waste, when TDS comes down while flushing(ideally you want a TDS meter right after your RO membrane), you close the flush valve, then close the 3 way sending water to your DI.

So instead of having 2 waste lines i can add a y adapter to keep it one?

 

[Dburr1014]

I'm assuming(can't see the entire unit), that is the line going into the DI stage?

If yes, then yes. You plug the one end from the RO into the 3 way(bottom), one to waste(I use a Y adapter so I only have 1 waste line), and the other to your DI.

When you flush the unit, you send all the water to waste, when TDS comes down while flushing(ideally you want a TDS meter right after your RO membrane), you close the flush valve, then close the 3 way sending water to your DI.

This is it right here^^

Have you checked your water before it goes into the unit? I bet it's really high.

 

[Notsolostfish]

This is it right here^^

Have you checked your water before it goes into the unit? I bet it's really high.

Im going to double check it today. So you are saying its high enough to burn my resin that fast? I use my RO unit frequently. So far i used it to make 1 44 gallon water change. And more frequent evaporation add up.

 

[homer1475]

The way the valve works.....

What you have labeled as to RO, I think you mean FROM RO? If yes, then YES that is how it works.

I have a Y adapter on my waste line, one from the RO waste, and the other from the "flush"(3 way) line, with just 1 line actually going to waste.

Mur-lok RO Tube Divider 1/4" x 1/4" x 1/4" Push Connect

Mur-lok RO fittings are the only RO fittings that feature dual EPDM O-rings to ensure a straight leak free fit. We believe GA Murdock Mur-lok fittings to be the best so strongly that we use them virtually exclusively on each of our BulkReefSupply.com reverse osmosis and BRS media reactors. These...

www.bulkreefsupply.com

 

[homer1475]

Im going to double check it today. So you are saying its high enough to burn my resin that fast? I use my RO unit frequently. So far i used it to make 1 44 gallon water change. And more frequent evaporation add up.

When I flush my system, I notice the high TDS creep is as high as 50 from water just sitting in the membrane. My source water is low at 21TDS

If you don't flush that down the drain, your pushing that into your DI.

Without knowing what the TDS creep is, hard to say how long it will deplete the DI.

Also have you checked your tap water for chlorine, or chloramines?

 

[Notsolostfish]

The way the valve works.....

What you have labeled as to RO, I think you mean FROM RO? If yes, then YES that is how it works.

I have a Y adapter on my waste line, one from the RO waste, and the other from the "flush"(3 way) line, with just 1 line actually going to waste.

Mur-lok RO Tube Divider 1/4" x 1/4" x 1/4" Push Connect

Mur-lok RO fittings are the only RO fittings that feature dual EPDM O-rings to ensure a straight leak free fit. We believe GA Murdock Mur-lok fittings to be the best so strongly that we use them virtually exclusively on each of our BulkReefSupply.com reverse osmosis and BRS media reactors. These...

www.bulkreefsupply.com

How hard is it to change DI resin? Never did it before. And i couldnt find a good youtube video to show me how they open the cartidges, and etc. Do u know any good video?

 

[Notsolostfish]

When I flush my system, I notice the high TDS creep is as high as 50 from water just sitting in the membrane. My source water is low at 21TDS

If you don't flush that down the drain, your pushing that into your DI.

Without knowing what the TDS creep is, hard to say how long it will deplete the DI.

Also have you checked your tap water for chlorine, or chloramines?

I have not. How do i check that? Any test kit? And even if there is thr 6 the stage wouldnt take care of it?

 

[homer1475]

How hard is it to change DI resin? Never did it before. And i couldnt find a good youtube video to show me how they open the cartidges, and etc. Do u know any good video?