[Blue Giraffe]

Can someone please help me decide which would better suit me?

I've done quite a lot of reading up, but there is so many variables I'm just not sure what I need and keep going round in circles.

At the moment I'm making pure into 25l barrels via twin 11ltr DI's but that is proving expensive (seem to be spending out on resin every 2-3 weeks). 

Water is 190-200 ppm, I vary from being single operator to sometimes working with someone else - max I would use at the moment would be around 400l (once everyone's had their first clean with WFP!).  I've got a garage built in (town house), so can have an IBC etc - but I may be moving over the next few months, so not sure if I'll have a garage but would plan to build a shed for the tank and all my wfp bits.  I'm on a meter, had planned on a 40/40 but now not sure if it's overkill at the moment..

[8weekly]

You should definitely have an RO. Being on a meter would make me inclined to go for a 40/40 if funds allow.

[Smudger]

Where do you want your biz to go, a small, slow RO will be better on waste water, and get your ppm lower than a 4040.

RO 4040 is future proof, will give you water very quickly, and at a tap TDS of 200 easily get you 5 ppm pure, so again resin use would. Be minimal. If you go for 4040 get a decent booster pump as well.

If it were my choice I'd have the 4040

Darran

[Dave Willis]

Why is a small ro better on waste water?

I keep toying with the idea of a 4040 but the expense doesn't seem worth it for me especially if you need to fork out for a booster pump too. Probably because I don't fully understand the difference.


When I was a printer each machine was fitted with its own 4040 ro unit along with a water softener and booster pump.
The firm went bust and I tried to get hold of a couple but some bright spark bought the company and opened it up again. 

[8weekly]

Why is a small ro better on waste water?

I keep toying with the idea of a 4040 but the expense doesn't seem worth it for me especially if you need to fork out for a booster pump too. Probably because I don't fully understand the difference.


When I was a printer each machine was fitted with its own 4040 ro unit along with a water softener and booster pump.
The firm went bust and I tried to get hold of a couple but some bright spark bought the company and opened it up again. 

I thought 40/40s produced lass waste. Apologies for my bad advice.

[Dave Willis]

I keep getting drawn to one of these

  http://www.gardinerpolesystems.co.uk/acatalog/-EZ-Pure--Commercial-RO-HF5---Kit1-EZ_PURE_RO_KIT1_HF5.html


better get it in before the end of the tax year!

[Blue Giraffe]

I keep getting drawn to one of these

  http://www.gardinerpolesystems.co.uk/acatalog/-EZ-Pure--Commercial-RO-HF5---Kit1-EZ_PURE_RO_KIT1_HF5.html


better get it in before the end of the tax year!

Interesting... what's the difference between that an a 40/40?  Is it better?  Never seen one before.

[koopmaster]

my ppm is 250 and I went out and bought a 1000l tank (second hand) for about £30.  I then bought a john guest 100 GPD RO\DI but this has been upgraded to 200 GPD.

so my current setup is 200 GPD RO/DI system pumping into a 1000 L tank.  

System works perfectly and I buy 10L resin every 6 months.

[8weekly]

my ppm is 250 and I went out and bought a 1000l tank (second hand) for about £30.  I then bought a john guest 100 GPD RO\DI but this has been upgraded to 200 GPD.

so my current setup is 200 GPD RO/DI system pumping into a 1000 L tank.  

System works perfectly and I buy 10L resin every 6 months.

How long does it take to fill the tank?

[Smudger]

Dave, like most things it varies on circumstances, the smaller RO systems process slowly so get to process the water to a lower TDS ( although there's not much in it 3 or 4 in the range )

RO 4040's esp with booster pump produce water at great speed mines nearly 200 ltrs p/h - speed and time saving is the biggest plus for me as we use between 1000 to 1500 ltrs per day, so something that takes 24 hrs to produce 1000 ltrs is unviable.

But due to the speed TDS is a little higher, I get a TDS of 10 from 320 way, way back I used a 420 GDP RO this gave 3 TDS

Not measured my waste ratio, it's set by pure freedom, but looks around 50/50

Darran

[PoleKing]

I'd say go for the 450GPD.
1000l IBC running 24/7, once full you've got 2 &1/2 days work.
Even if you use more than you produce you'll catch up over the weekend.
It's all in the timing.
If you're insure of the immediate future-keep it simple & cheap.
Once things get a bit more settled you can invest more money, if you see the need.

[CLEANCARE WC]

I'd say go for the 450GPD.
1000l IBC running 24/7, once full you've got 2 &1/2 days work.
Even if you use more than you produce you'll catch up over the weekend.
It's all in the timing.
If you're insure of the immediate future-keep it simple & cheap.
Once things get a bit more settled you can invest more money, if you see the need.

I agree with the above start the week with a full van tank and full static (filled at wknd) then come home from work fill van, run r.o. to top up static you will always have more than you need.

[Blue Giraffe]

Thanks for all the replies people, very helpful.

Gonna start with a 450gpd and then just upgrade as and when I need a 40/40 I think, will save me a few hundred quid this month for other stuff I need for the business...

Are those 450's that people link to on Ebay any good? (£160) or should I buy one off someone like Daqua?

[andyM]

Dave, like most things it varies on circumstances, the smaller RO systems process slowly so get to process the water to a lower TDS ( although there's not much in it 3 or 4 in the range )

RO 4040's esp with booster pump produce water at great speed mines nearly 200 ltrs p/h - speed and time saving is the biggest plus for me as we use between 1000 to 1500 ltrs per day, so something that takes 24 hrs to produce 1000 ltrs is unviable.

But due to the speed TDS is a little higher, I get a TDS of 10 from 320 way, way back I used a 420 GDP RO this gave 3 TDS

Not measured my waste ratio, it's set by pure freedom, but looks around 50/50

Darran

That's an interesting theory Darran but im not quite sure it always works out like that.
I just believe some RO's are more efficient than others at lowering tds.
For example I previously had a Vyair 400 gpd RO with booster pump, and the lowest output tds I could ever achieve was 12ppm from a tap tds of 280ppm.
I now use a 4040 with a HF4 membrane and Clarke booster pump but achieve a tds of 6ppm.

[PoleKing]

Thanks for all the replies people, very helpful.

Gonna start with a 450gpd and then just upgrade as and when I need a 40/40 I think, will save me a few hundred quid this month for other stuff I need for the business...

Are those 450's that people link to on Ebay any good? (£160) or should I buy one off someone like Daqua?

The eBay ones are fine.
Probably the same ones that the big boys sell anyway.
But you don't get the aftercare.
But, again, you probably won't need it. They're not difficult.
The one I had was an eBay one.
Problem free for 18 months.

[Smudger]

Andy
Yes I agree quality of membranes will also effect the resulting TDS.

Darran

[Clever Forum Name]

Just purchased a 450 GPD from eBay.

380-420 tds down to 20 - 17 tds

Produces 1L pure every 1.45 secs

24hrs = 1000L

[Blue Giraffe]

Just purchased a 450 GPD from eBay.

380-420 tds down to 20 - 17 tds

Produces 1L pure every 1.45 secs

24hrs = 1000L

Cheers, if I get similar results will do me for the time being

[Clever Forum Name]

Just purchased a 450 GPD from eBay.

380-420 tds down to 20 - 17 tds

Produces 1L pure every 1.45 secs

24hrs = 1000L

Cheers, if I get similar results will do me for the time being

It's a new RO. producing at 13ppm now