High TDS new system

[Mattygno1]

Hi just looking for some help please. I have just bought a Rear Osmosis 40/40 van system and the readings are high for the TDS. The guy who built it has ran water through it and I am testing the system today but the TDS is currently 11 and rising. I started using the water in there from the weekend (first chance to give it a whirl today). I have started filling it up now but readings are still high. Should I have drained the tank first?

Any advice would be appreciated.

Matt

 

[Nudel]

What is the input tds?

 

[doug atkinson]

Is this ppm after DI or ppm after R/O. If after R/O then that seems okay to start off.

 

[Mattygno1]

The start off TDS was 11 then when I started putiting water in it was 12. It’s the first time it has been used after being installed so could this be the issue?

using the R/O

 

[doug atkinson]

I presume you are talking about a van mount system with R/O and was installed by a company. Any system installed should be tested and reading 000 ppm before handing over to the customer. This is how we work.

I would go back to your supplier and ask for them to rectify it as may be a small problem to fix.

There are loads of scenarios that will cause this to happen.

 

[Mattygno1]

Hi thank you all for your help. The company have asked me to change the resin first and see how it goes. Will give it a whirl and see what happens. 

 

[spruce]

Hi thank you all for your help. The company have asked me to change the resin first and see how it goes. Will give it a whirl and see what happens. 

That's a sticking plaster solution. If you replace the resin it will bring the water tds down to zero, but it will mask the issue for a while - long enough to stop you moaning at them.

You need to tell us;

Water pressure at the r/o,

Water flow available in lpm to the r/o,

The tds of your tap water,

The tds of your pure after the r/o membrane but before di,

The tds of your water after di.

When running the r/o, what is your pure to waste ratio?

There is a supplier who is selling cheap r/o membranes but they only have an efficiency of 80 to 85%. In other words they are only removing 80 to 85 ppm for each 100ppm of dissolved solids. A good quality membrane will remove 97 to 98% of the dissolved solids in the water. 

 

[Tuffers]

Did OP flush the system to start with?