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Do 4040 systems bring tds a lot compared to...

Jake

Well-known member
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3,438
.... A standard 450gpd system? (I ment 'down a lot' in the title)

Reason I ask is I have been buying my pure water since I went wfp and want to start producing my own,

My water is very hard (480ppm!)

What do you guys recommend? I was thinking of getting the 450gpd system from pure freedom? Or will this not be good enough?

 
.... A standard 450gpd system? (I ment 'down a lot' in the title)
Reason I ask is I have been buying my pure water since I went wfp and want to start producing my own,

My water is very hard (480ppm!)

What do you guys recommend? I was thinking of getting the 450gpd system from pure freedom? Or will this not be good enough?

Flip, that's not far off Hartlepoole's 550 ppm.

A 450 GPD provided enough water for 2 of us (both vans filled for Monday over the weekend and a full IBC tank on Monday evening just got us through the week), but we processed water (still do) into an IBC tank and transferred to the van when needed. The tank has a float switch which switches the water flow off to the r/o when the tank is full using a solenoid valve.

At 480ppm your membranes won't last that long and you will need to be fastidious with regard to flushing. You may even need to add a booster pump to ensure your membranes are working as efficiently as possible. I would also seriously consider a water softener to exchange those calcium and magnesium ions with sodium ions which are kinder to membranes.

I would rather recommend a 4021 or a 4040. You will produce water much faster and will always have enough water. Yes they are more expensive than a 450GPD but you can't grow much if you don't have enough water. Those 450 GPD are very slow at best. It took us 28 hours to completely fill and IBC tank, 34 hours in the winter.

 
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Ok sure,

Yeah it's majorly high, I'm thinking a booster pump is a must, how do you flush the system?

 
Ok sure,
Yeah it's majorly high, I'm thinking a booster pump is a must, how do you flush the system?
The waste is throttled back with a restrictor or tap to force water through the membranes under pressure. Flushing is achieved by opening the waste valve so water washes over the surface of the membrane flushing some of the deposits away.

 
We bought a kinetico mini softner about 8 years ago, cost around a grand but its had 8000L pure made a week from it all for a bag of salt every two weeks or so.

A solid investment

 
We bought a kinetico mini softner about 8 years ago, cost around a grand but its had 8000L pure made a week from it all for a bag of salt every two weeks or so.
A solid investment

So what's the advantages of a softener? Is it just good for really hard water?

 
So what's the advantages of a softener? Is it just good for really hard water?
It doesn't actually soften the water. The water coming out of the softner will still be the same (to a few points) of the water going in.

As the water goes though the softner it strips the magnesium and calcium deposits from the water and replaces them with sodium ions. Its the calcium that blocks up membranes and it the same stuff that firs the inside of your pipes and causes limescale deposits/staining everywhere water accumulates and left to dry ie toilet bowl, basin, sink, shower, bath, etc.

Sodium ions are much kinder to membranes so they will last longer and be more efficient. They still have to remove the high tds but they won't get clogged up as much.

For more info

http://www.popularmechanics.com/home/interior-projects/how-to/a150/1275126/

 
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As he said above. We have a tds of about 385 here just below the chalky south downs. Our membranes needed to be flushed every week with out failure before a softener.

Now we barely flush it ever and the current 4040 system brings it down to about 008 before polishing, and had done for the last year consistently!

Buy an auto regeneration softener with a double chamber. This is so even when it regenerates there is a second cylinder to work with and soften water

 
the current 4040 system brings it down to about 008 before polishing, and had done for the last year consistently!
I have an auto-regen double chambered softener too. Amazing difference. I have the whole house running through it, so taps and shower stay much cleaner.

Anyway, I have a 450 but am tempted by a 4040. Also have high TDs, 330. Are you boosting your pressure to get 008?

If so what booster?

Not sure if the aquatech 24v one I'm using now is up to the job of a 4040?

 
Thats in our unit at work and is off the mains! So good pressure there. But a booster would really help if on low pressure

 
I have an auto-regen double chambered softener too. Amazing difference. I have the whole house running through it, so taps and shower stay much cleaner.
Anyway, I have a 450 but am tempted by a 4040. Also have high TDs, 330. Are you boosting your pressure to get 008?

If so what booster?

Not sure if the aquatech 24v one I'm using now is up to the job of a 4040?

Its not big enough. You need a proper booster pump. Do a search for what people use. Gaps Water suggest this,

https://www.machinemart.co.uk/shop/product/details/cbm240e-1in-multi-stage-230v-booster-pum

but others use cheaper pumps effectively such as this

https://www.machinemart.co.uk/shop/product/details/051011800

I have no experience with a booster pump. Our water pressure is 50 psi and we use an HF5 membrane and that produces 2 LPM of pure which is more than enough for us.

 

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