BRS RO/DI Priming Question

[Conor_K]

So i just got my shiny new RO/DI unit hooked up and am in the process of priming it, which is an hour long process per the manul.

I assume the the flush valve should be open for this process? This make sense to me, but the instructions are not clear on this.

Thanks,
C

 

[srope]

I don't have a BRS unit but I don't remember a priming step with mine. It's been a while thou.

 

[Conor_K]

Well this is my first one and I followed instructions, but it was not specific on whether or not the the flush valve should be open or not.

It seemed silly to run an hour's worth of water through the DI resin so I left it open.

Too late to do anything different now...

 

[Teecz]

I just got my brs unit as well I left the flush open like you did. It seemed like a waste for the DI part so kept it open.

 

[royvoss]

i would check brs, with seeing the way it is plumbed up , on my unit(spectrapure) the flush valve is used to flush the membrane after your are make water,

 

[tangified]

Never heard of priming a Ro system. But you do need to run water through it thoroughly prior to keeping clean water. So that might be what they are calling priming. That said you would still need to produce about 5 gals or so of RODI before you use it. So keeping the flush valve open will not work in this instance.

 

[Conor_K]

5 gallons? That's over an hour so maybe I do need to run it for that long.

Going to check with BRS now. I'll report back.

 

[Conor_K]

Alright so I spoke with chad via their online chat:

For the priming step, should i be doing that with the flush valve open or closed?
Chad: That's a great question. When you first turn it on, you'll want the flush valve open to flush the membrane for a few minutes, and you're good to start making water.
you: Per the instructions, you are supposed to "prime" it for an hour before the first use..
Chad: yeah, this is to play it safe, though in most cases, just a few minutes is fine.
you: OK, but for the first prime, for an hour, should the be run for an hour with the valve closed?
Chad: You're just flushing any dust out the waste line so it doesn't clog the membrane.
you: Alright. The instructions are confusing on this point.

Not the clearest answer ever, but I'll take it. I ran the unit in normal operation for the first 10 minutes after flushing for an hour. Outgoing TDS is zero, so I'm good with it.

 

[tangified]

Can't get better then 0 TDS.
Filter away

 

[Teecz]

Thanks for posting your find. Good info to know I was confused as well.

 

[Buckeye Hydro]

The membrane SHOULD NOT BE INSTALLED when you are first rinsing new prefilters. You don't want the carbon dust going into the membrane, regardless of the position of the flush valve.

Russ