[Clever Forum Name]

Does anybody do this at all?

I have noticed when i switch my RO on for around 4 minutes it will produce water from around 200 and steadily drops to normal low TDS production after 4 minutes.

It's quite simple to do, two taps a t piece.

Just wondered if anybody does this, or is it even worth it lol

[robert mitchell]

yes , i just disconnect the di for a few minutes.

[steven ainger]

Does anybody do this at all?

I have noticed when i switch my RO on for around 4 minutes it will produce water from around 200 and steadily drops to normal low TDS production after 4 minutes.

It's quite simple to do, two taps a t piece.

Just wondered if anybody does this, or is it even worth it lol

 +1 same here

[richard groves]

do you mean like a by pass ?
I have a 4040 , with a needle valve on the waste, just before it where it leaves the housing I have a t peice that by passes the needle valve with a ball lever valve on it, it then rejoins the waste pipe after the needle valve with another t peice.

When I turn on the water the tds is high so I open the ball lever valve on the by pass ( this diverts all water to waste )
Once the tds drops to normal levels after a few mins , I close it and start to produce pure. This also means that once the needle valve is set to the optimum waste/pure ratio there is never any need to adjust it when you need to flush the membrane.

[Clever Forum Name]

Bascially yes, thanks.

[dannymack]

Yes I did that as my Tds was quite high, but since I changed filters my Tds is low when i start using the ro so don't switch the tap over to waste anymore. 👍

[Paul Coleman]

Does anybody do this at all?

I have noticed when i switch my RO on for around 4 minutes it will produce water from around 200 and steadily drops to normal low TDS production after 4 minutes.

It's quite simple to do, two taps a t piece.

Just wondered if anybody does this, or is it even worth it lol

I don't run it through DI initially either.  I have a T piece with plastic taps.  For the first few minutes I run it into a container - then turn the taps the other way and run it into the holding tank.  It doesn't even cost me time because I do it while the van tank is filling.

[SeanK]

There is no reason to run your water through the R.O. and D.I. in one go and no advantage either.
I fill my tank with R.O. water which is around 10ppm I then put it through the D.I. as needed taking it to 000ppm.
The advantages of this are.
I don't need to worry about R.O. spikes shortening my Resin lifespan.
Can open up the tap and flush the R.O. without contaminating the resin.
Can bypass my D.I. when cleaning fascias and solar panels this saves on resin costs.
If the membrane fails then I can catch it on without ruining a batch of resin as well.
The only disadvantage I can think of is having to carry a D.I. vessel in my van.