RO Flush Valve added - How long to flush?

[Reef.]

He thought you were talking about flushing the membrane, which means sending all the water down the waste line.

I did thanks.

 

[Opus]

??? I'm not drinking my waste water?

My RODI system has a separate line built in that continually sends the waste water into my drain piping. Until my reservoir is full.

Does every RODI unit not have that?

I've got a black line taking the water in, yellow line sending it to the reservoir, and a red line sending the waste water to my drain pipes.

Why would I drink the waste water from an RODI unit XD?

Im saying when I run my unit, I'll turn it on, fill up 3-4 gallons of my drinking water, then once it's been running for awhile and the reservoir's almost empty I'll then check the TDS (which is always 0 by then) and then use it for my fish water.

When I first turn it on, even if it's coming from the reservoir i always get 3-4 TDS. Doesn't bother my stomach....

My tap is 450tds, l love it. Lots of minerals to build a healthy body. Wife hates the taste and smell.

 

[joe-ejs]

He thought you were talking about flushing the membrane, which means sending all the water down the waste line.

So with the talk about rejection rate on a membrane...what do you folks have for your TDS input out of the membrane, thus into the DI?

 

[WVNed]

2-3

 

[Biglew11]

145 coming in 2-3 coming out with 2 membranes in watersaver setup so that's 2-3 tds after its combined going into the di.

 

[KStatefan]

Mine runs about 7 tds out of the membrane with about 450 in.

 

[Opus]

So with the talk about rejection rate on a membrane...what do you folks have for your TDS input out of the membrane, thus into the DI?

Mine runs between 3 and 4 out with around 450 in. I'm running a 99%+ Spectrapure membrane. I've talked to people that are still getting 99% rejection from their Spectrapure membrane after 5 years of use. Mine is going on 3 years of use. I also run a .2 micron sediment filter and 2 .5 micron carbon filters before the membrane. The 2 carbon filters are overkill but I know I'm lazy and will not change the filters on time so this helps protect the membrane a lot longer from chlorine.

 

[Tastee]

For me 2 mins is enough but I only have 70-90 TDS coming in. I have a TDS meter after the RO and before the DI and it usually starts around 35 TDS and then drops close to 1 after about 90 secs.

How long you need probably depends on your water conditions. A TDS meter after the RO will help you figure out how long is enough.