New ro unit and tds issues

fishkeeprian · 08/17/2018, 02:59 AM

Hello,

Is it possible for wound up extra water line for the in and out lines would affect the TDS of out coming water?

The unit I have is;

https://www.vyair.com/pumped-4-stage...EaArOqEALw_wcB

Thanks

mcgyvr · 08/17/2018, 04:35 AM

No...

fishkeeprian · 08/17/2018, 04:41 AM

Quote:

Originally Posted by mcgyvr

No...

Just don't understand why I can't get 0 TDS.

mcgyvr · 08/17/2018, 04:58 AM

Quote:

Originally Posted by fishkeeprian

Just don't understand why I can't get 0 TDS.

It seemed like you had enough comments in your other post so I didn't pile mine on too..
I can go back and read that again and make suggestions if you want but I thought you were waiting on new membrane/cartridge so I'll wait till after that and see if your results change..

Make sure you pack that DI stage TIGHT...You don't want water channeling past because it wasn't packed tight..

fishkeeprian · 08/17/2018, 05:30 AM

Quote:

Originally Posted by mcgyvr

It seemed like you had enough comments in your other post so I didn't pile mine on too..
I can go back and read that again and make suggestions if you want but I thought you were waiting on new membrane/cartridge so I'll wait till after that and see if your results change..

Make sure you pack that DI stage TIGHT...You don't want water channeling past because it wasn't packed tight..

Yeh, I'm waiting for replacements. The manufacturer pointed out once I've installed the new ro membrane I should flush the unit for 1 hour because it contains a chemical, not sure how true this is but it didn't say that in the instructions.

I might try packing in a bit more resin. but I'm getting a reading of 21ppm before the resin which I getting told is high.

I have used a handled TDS metre for a second opinion against the inline one. The TDS came out at 3ppm on the handheld so I am confident I am getting an accurate reading.

mcgyvr · 08/17/2018, 06:52 AM

Yes a 91% rejection rate is not good.
You should be getting 96% min typically..

But the DI stage (when new) should easily take that to zero if it was working properly..

Pack it TIGHT man.. Pack it up TIGHT..

billdogg · 08/17/2018, 07:50 AM

When I refill my DI cartridge, I spend at least 10 minutes just picking it straight up a few inches and then dropping straight back down on the table. Keep adding resin until it just won't compress any more. Then do it for a few more minutes.

hth

fishkeeprian · 08/17/2018, 10:12 AM

Quote:

Originally Posted by billdogg

When I refill my DI cartridge, I spend at least 10 minutes just picking it straight up a few inches and then dropping straight back down on the table. Keep adding resin until it just won't compress any more. Then do it for a few more minutes.

hth

I think I will get a small stick and jabb it down into the canister cartridge. I've added some Di resin and it got it down to it flickering between 1 and 2. I think the main problem is the ro membrane as the waters ppm is still 21 when passed through but said above the new resin should still be able to handle the remainder so there is a bit of work I need to do to pack it down and get it tight.

mcgyvr · 08/17/2018, 10:38 AM

IMO a good multiple up/down table smacking to settle it like billdog said is better than a stick as far as compressing it goes..

Fill it a few inches (8-10cm for you).. Then a few up/down smacks.. Fill a bit more.. up/down smacks.... repeat as needed till its good and solid.
They usually do a good job giving you the proper amount in the packs.. Use it all and get it all in there..

fishkeeprian · 08/18/2018, 06:27 AM

Quote:

Originally Posted by mcgyvr

IMO a good multiple up/down table smacking to settle it like billdog said is better than a stick as far as compressing it goes..

Fill it a few inches (8-10cm for you).. Then a few up/down smacks.. Fill a bit more.. up/down smacks.... repeat as needed till its good and solid.
They usually do a good job giving you the proper amount in the packs.. Use it all and get it all in there..

New membrane in and di in. Packed as much as I can in. Is it not normal for the tds to start higher and then gradually reduce? Mine started as 10ppm TDS and has now dropped to 5, I hoping for it to fall more but we will see. I thought you would get 0ppm straight away?

ROB2005 · 08/18/2018, 07:09 AM

Are you measuring after the di? Or after the membrane? Just want to clarify?

fishkeeprian · 08/18/2018, 07:39 AM

Quote:

Originally Posted by ROB2005

Are you measuring after the di? Or after the membrane? Just want to clarify?

After the di I'm getting 3ppm just can't get it down to 0

scottwhitson · 08/18/2018, 08:18 AM

It is normal for TDS to start high then come down pretty quick everytime you start the system. I have my apex setup to send the first five minutes of water down the drain then switch to filling my reservoirs just to help with this.

scottwhitson · 08/18/2018, 08:27 AM

Quote:

Originally Posted by fishkeeprian

After the di I'm getting 3ppm just can't get it down to 0

Does your flow restrictor size match your RO membrane size in GPD?

mcgyvr · 08/18/2018, 09:17 AM

Run the new filters for an hour or so...at the end of that you should have zero tds
If not something is wrong..
Report back with incoming tds...post ro tds and post di tds

fishkeeprian · 08/18/2018, 09:32 AM

Quote:

Originally Posted by scottwhitson

Does your flow restrictor size match your RO membrane size in GPD?

Flow restrictor?

fishkeeprian · 08/18/2018, 09:37 AM

Quote:

Originally Posted by mcgyvr

Run the new filters for an hour or so...at the end of that you should have zero tds
If not something is wrong..
Report back with incoming tds...post ro tds and post di tds

Ok will do. I just had the unit apart, checked all seals and vaselined them. Checked filters cartridges to make sure all was correct. Tightened canisters up. Now will run for an hour or so. It has dropped to 3ppm product out out so must of done something right when I stripped it down.

scottwhitson · 08/18/2018, 09:39 AM

There is a flow restrictor that should have came with your RO setup and it has to be matched to the size flow rate of RO membrane you have.
https://www.bulkreefsupply.com/rever...SAAEgJfQfD_BwE
If you bought the same GPD RO membrane that the u it came with you should be OK but maybe it was shipped with the wrong one from the factory.

scottwhitson · 08/18/2018, 09:42 AM

Quote:

Originally Posted by fishkeeprian

Ok will do. I just had the unit apart, checked all seals and vaselined them. Checked filters cartridges to make sure all was correct. Tightened canisters up. Now will run for an hour or so. It has dropped to 3ppm product out out so must of done something right when I stripped it down.

Is the 3 TDS after the DI or RO?

fishkeeprian · 08/18/2018, 10:01 AM

Quote:

Originally Posted by scottwhitson

Is the 3 TDS after the DI or RO?

3ppm after Di

fishkeeprian · 08/18/2018, 10:06 AM

Quote:

Originally Posted by scottwhitson

There is a flow restrictor that should have came with your RO setup and it has to be matched to the size flow rate of RO membrane you have.
https://www.bulkreefsupply.com/rever...SAAEgJfQfD_BwE
If you bought the same GPD RO membrane that the u it came with you should be OK but maybe it was shipped with the wrong one from the factory.

It came with a check valve is that it?

scottwhitson · 08/18/2018, 10:14 AM

https://www.bulkreefsupply.com/instr...-your-membrane

Check this link out it shows where it should be installed. It can be inside of the fitting/hose or it can be an online type but either type will be in the waste output line of the RO membrane. Its purpose is to keep the flow rate through the membrane correct so it can do its job.

fishkeeprian · 08/18/2018, 10:23 AM

Quote:

Originally Posted by scottwhitson

https://www.bulkreefsupply.com/instr...-your-membrane

Check this link out it shows where it should be installed. It can be inside of the fitting/hose or it can be an online type but either type will be in the waste output line of the RO membrane. Its purpose is to keep the flow rate through the membrane correct so it can do its job.

I see it didn't come with one of those.

scottwhitson · 08/18/2018, 10:27 AM

Did you look inside the waste line?

fishkeeprian · 08/18/2018, 10:49 AM

Quote:

Originally Posted by scottwhitson

Did you look inside the waste line?

Just checked and there's not one in there.

08/17/2018, 02:59 AM	#1
fishkeeprian Registered Member Join Date: Feb 2016 Location: England, Earl Shilton Posts: 1,452	New ro unit and tds issues Hello, Is it possible for wound up extra water line for the in and out lines would affect the TDS of out coming water? The unit I have is; https://www.vyair.com/pumped-4-stage...EaArOqEALw_wcB Thanks __________________ If in doubt ask!

08/17/2018, 04:35 AM	#2
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	No... __________________ Who me?

08/17/2018, 06:52 AM	#6
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	Yes a 91% rejection rate is not good. You should be getting 96% min typically.. But the DI stage (when new) should easily take that to zero if it was working properly.. Pack it TIGHT man.. Pack it up TIGHT.. __________________ Who me?

08/17/2018, 07:50 AM	#7
billdogg Registered Member Join Date: Apr 2008 Location: Grove City, Ohio Posts: 10,806	When I refill my DI cartridge, I spend at least 10 minutes just picking it straight up a few inches and then dropping straight back down on the table. Keep adding resin until it just won't compress any more. Then do it for a few more minutes. hth __________________ I'll try to be nice if you try to be smarter! I can't help that I grow older, but you can't make me grow up! Current Tank Info: 120 mixed reef with 40b sump, RO 150 skimmer, AI Sol Blue x 2, and a 60g Frag Tank with 100g rubbermaid sump. 2 x Kessil A360w lights, BM curve 5 skimmer

08/17/2018, 10:38 AM	#9
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	IMO a good multiple up/down table smacking to settle it like billdog said is better than a stick as far as compressing it goes.. Fill it a few inches (8-10cm for you).. Then a few up/down smacks.. Fill a bit more.. up/down smacks.... repeat as needed till its good and solid. They usually do a good job giving you the proper amount in the packs.. Use it all and get it all in there.. __________________ Who me?

08/18/2018, 07:09 AM	#11
ROB2005 Reefing Is My Passion! Join Date: Dec 2004 Location: Miami, FL Posts: 719	Are you measuring after the di? Or after the membrane? Just want to clarify? __________________ If at first you don't succeed at reefing, break it down and set back up😁 Current Tank Info: 75 gallon corner overflow, 4-54W T-5 , dozen blue hermits, tiger pistol/yellow watchman goby, royal gramma, banghai and pajama cardinals

08/18/2018, 08:18 AM	#13
scottwhitson Registered Member Join Date: Feb 2005 Location: Lewiston, Idaho Posts: 1,395	It is normal for TDS to start high then come down pretty quick everytime you start the system. I have my apex setup to send the first five minutes of water down the drain then switch to filling my reservoirs just to help with this.

08/18/2018, 09:17 AM	#15
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	Run the new filters for an hour or so...at the end of that you should have zero tds If not something is wrong.. Report back with incoming tds...post ro tds and post di tds __________________ Who me?

08/18/2018, 09:39 AM	#18
scottwhitson Registered Member Join Date: Feb 2005 Location: Lewiston, Idaho Posts: 1,395	There is a flow restrictor that should have came with your RO setup and it has to be matched to the size flow rate of RO membrane you have. https://www.bulkreefsupply.com/rever...SAAEgJfQfD_BwE If you bought the same GPD RO membrane that the u it came with you should be OK but maybe it was shipped with the wrong one from the factory.

08/18/2018, 10:14 AM	#22
scottwhitson Registered Member Join Date: Feb 2005 Location: Lewiston, Idaho Posts: 1,395	https://www.bulkreefsupply.com/instr...-your-membrane Check this link out it shows where it should be installed. It can be inside of the fitting/hose or it can be an online type but either type will be in the waste output line of the RO membrane. Its purpose is to keep the flow rate through the membrane correct so it can do its job.

08/18/2018, 10:27 AM	#24
scottwhitson Registered Member Join Date: Feb 2005 Location: Lewiston, Idaho Posts: 1,395	Did you look inside the waste line?