Jump to content

Don't want to see ads? Become a subscribed member.

New ro

little j

Recommended Posts

Your RO membrane will reject new up to 99% so 1% of 299 is 2.9ppm or at worst 95% so 5% of 299 is 14.95ppm


this will be at maximum pressure 80 or 100 psi depending on which membrane you bought.


any pressure drop under this will result in less rejection at optimal ratio for your water type (soft or hard)


opening and closing the valve on the rejected water will increase or decrease the pressure at the RO but will also change the ratio between production and waste.


if you fit a pump before the pre filters you can get your optimal pressure 80 to 100psi depending again which membrane you bought without changing your ratio of rejected to pure.


hope this makes sense.


simple answer is no 67pm would not be normal you are getting 77 -78% rejection ish

Link to comment

A new membrane needs to be back flushed first for at least an hour to get rid of traces of manufacturing chems inside it. Also best not to have the di connected whilst back flushing as will just kill the resin quicker.

Link to comment

should I flush my R O before I start producing pure water

just reading smurfs thread, or just once a week

i,ve been flushing mine on every use, just want to make sure i,m doing everything right

Link to comment

Don't want to see ads? Become a subscribed member.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.

Ad Blocker Detected

Please disable your ad blocker

Our forum relies on ads to pay for the servers and our time maintaining and running the forum.

Sadly running a forum like this is not free, and due to our popularity, we need servers that can handle the amount of traffic and resources our forum uses.


If you do not wish to see ads on our site, please consider supporting the forum with a membership subscription.