RODI help needed!

[TheXpander]

Hi,
Have had my RODI water running now for around 30 minutes (I flushed the canisters first). I have a few issues though;
1 - there is a flow restrictor from the waste water already however far more water is exiting than waste, I thought this should be the other way round?

2 - Initially the waste water was reading 66ppm and the RODI was reading 12ppm, I was expecting it to come down but the RODI is now reading 88ppm and rising?!
The waste is measuring a steady 66.

Really not sure where I’ve gone wrong here? Does it have to run for hours before the level will come down?

thanks!!!!

 

[Saltyreef]

Hi,
Have had my RODI water running now for around 30 minutes (I flushed the canisters first). I have a few issues though;
1 - there is a flow restrictor from the waste water already however far more water is exiting than waste, I thought this should be the other way round?

2 - Initially the waste water was reading 66ppm and the RODI was reading 12ppm, I was expecting it to come down but the RODI is now reading 88ppm and rising?!
The waste is measuring a steady 66.

Really not sure where I’ve gone wrong here? Does it have to run for hours before the level will come down?

thanks!!!!

Youll want to figure out waste to product ratio first then modify your flow restrictor accordingly.

 

[TheXpander]

Thanks, how do I modify the flow restrictor?

 

[Saltyreef]

Follow these steps to ensure your system is set up right.

http://www.3reef.com/threads/did-you-adjust-your-new-ro-filter-flow-restrictor.82812/#ath

 

[TheXpander]

Thank you!!

 

[TheXpander]

Hi,
So I don’t have the adjustable set up as in the link, I’ve attached pictures of what I have set up, the system is 75g/hour, the flow restrictor has 450 written on it, I’m worried now I have damaged the RO membrane (initial collection readings were 12, they shot up to 122 and are now down at 67). Is it possible I have damaged this as the collection is flowing much faster than the waste?

 

[TheXpander]

Ok......just figured this out.....I opened up the RO membrane housing just to check, and there is no membrane in there!!! They must have forgotten to put it in!!!

thanks for all your helP!!

 

[Saltyreef]

Wow!
Nice catch!
Id opt for something with clear housings if youre going to swap out systems.
Have a look at the spectrapure maxcap standard system.
It arrived at a perfect 4 to 1 ratio

 

[TheXpander]

Makes sense why the collect was gushing out now

 

[TheXpander]

Wow!
Nice catch!
Id opt for something with clear housings if youre going to swap out systems.
Have a look at the spectrapure maxcap standard system.
It arrived at a perfect 4 to 1 ratio

Do you think the DI will need replacing now it’s been run without the membrane?

 

[Saltyreef]

Do you think the DI will need replacing now it’s been run without the membrane?

Most likely. What tds were you getting out of
the DI?
Ive had 1ppm final stage DI go back to zero after removing the excess c02 from my RO so id run water through it at a 4:1 ratio for maybe 10 gallons and then collect the DI and test. If its still high just replace.