RODI - DI bypass or Flush kit (or both?)

[Ky_acc]

Does anyone care to explain to me the difference between using a flush valve and DI bypass on an RODI unit?

I have heard mixed messages -some saying DI bypass is useful but flushing is a waste.

In general I think most agree that some method of flushing an RODI system is useful for extending the life of filters, but there seems to be a lack of consensus regarding whether using a DI bypass or flush valve is effective.

I am about to order a unit from @Buckeye Hydro and I just am wondering whether I should order both a DI bypass AND a flush kit, or just one or the other....

thanks!

 

[Silent]

Flushing helps your RO membrane last longer. DI bypass is used to help your DI resin last longer. Each has its purpose.

 

[Silent]

You should flush after each use or as often as possible. Bypass is used at the start of each use of RO/DI water than closed after a minute or two. When you first start your RO/DI unit the TDS will be a bit higher and will deplete your DI resin faster.

 

[Bryknicks]

If this is for a reef tank you will not need the DI bypass and would only want the flush valve. If you use the water for other purposes as well then you possibly would want to add a DI bypass depending on what your using it for.

 

[Water Dog]

If you’re going to choose one over the other, I’d choose the DI bypass as it will tremendously prolong the life of your DI resin. It’s good that you’re ordering from Buckeye Hydro. Shoot Russ a PM and he’ll point you in. The right direction.

 

[Water Dog]

If this is for a reef tank you will not need the DI bypass and would only want the flush valve. If you use the water for other purposes as well then you possibly would want to add a DI bypass depending on what your using it for.

DI bypass is essential to prevent high TDS creep water from depleting your DI resin upon system startup.

 

[Water Dog]

See my post HERE for an explanation of the difference between a RO membrane flush valve and a DI bypass valve.

 

[Opus]

I see the term flush valve used a lot for di bypass. Flushing the ro membrane in our little consumer units really does very little if anything. The di bypass will pro long the life of your di, hard to say how much since there are several factors involved.

 

[Buckeye Hydro Verified Sponsor]

If this is for a reef tank you will not need the DI bypass and would only want the flush valve. If you use the water for other purposes as well then you possibly would want to add a DI bypass depending on what your using it for.

We'll respectfully disagree with this. The DI Bypass is specifically intended for use on systems WITH A DI STAGE, like all the RODI's used in this hobby.

Russ