[DaveG]

After using the Merlin for the last 6 months, weve got through 6 bags of resin and its time to get rid! Our tds from tap is around 220 and the Merlin gets it down to 44 , which is pumped at 75 psi..(even after changing membranes..another 150 quid).

How you guys get tds down to 7 is beyond me!

Any suggestions on a better ro unit guys?

[Frankybadboy]

quite simply a 40/40 is the next step

[DaveG]

Cheers Franky, do you use one? If so what one, do you have a linky?

Cheers

[CLEANCARE WC]

you need one of these 

http://www.vyair.com/scripts/prodView.asp?idproduct=129

[Frankybadboy]

yes i use a 40/40 from x-line,brought second hand from a bloke who didnt have a clue

tds in 390 down to 17 before di,at psi 55,doing a bout over 150ltrs ahour,ive brought a booster pump but not fitted it in yet as 40/40 is in downstair down for the winter and no room left,so waiting til it goes back out side

[Cliff perkins]

how long does the membrane last on a 4040 compared to a merlin and do u need any pre filters ?

[Nathanael Jones]

you need one of these 

http://www.vyair.com/scripts/prodView.asp?idproduct=129

Yep, the vyair ones are very good. I've got the 400gpd pumped one, MUCH better than my old merlin & produces water almost as fast:
http://www.vyair.com/scripts/prodView.asp?idproduct=96

[Mike_G]

A bag of resin every month, you must use an awful lot of water. I have a merlin which gets my tds down to about 35 most times and I guess I use one bag a year

[Ian Rochester]

40-40 RO is the way to go, I put a new membrane in mine 12 months ago (last one was in for 5 years) we check it every week, takes water from 280 to 007.  I've also fitted a 35" DI in line before it goes into 2 x 1000 ltr holding tanks which takes it down to 000.  The resin in there have been in for around 6 months and still gives 000.  Waste water ratio is around 1:1

All I have in the vans now is a tank, pumps and small DI's for piece of mind, the guys fill up at the end of each day and the 2 holding tanks are full again by the morning.

[SunShineCleaning]

After using the Merlin for the last 6 months, weve got through 6 bags of resin and its time to get rid! Our tds from tap is around 220 and the Merlin gets it down to 44 , which is pumped at 75 psi..(even after changing membranes..another 150 quid).

How you guys get tds down to 7 is beyond me!

Any suggestions on a better ro unit guys?

At 44ppm you will be getting through 13000 Litres per month 
Are you sure of your figures, thats an awful lot!

If so then you need an industrial unit.

[G & M]

How often do you change the filters Nathanael?

[Nathanael Jones]

How often do you change the filters Nathanael?

Ya,... I must remember to do that,... 

18 months & I've changed the pre-filters twice. I don't use a lot of water though.

[DaveG]

After using the Merlin for the last 6 months, weve got through 6 bags of resin and its time to get rid! Our tds from tap is around 220 and the Merlin gets it down to 44 , which is pumped at 75 psi..(even after changing membranes..another 150 quid).

How you guys get tds down to 7 is beyond me!

Any suggestions on a better ro unit guys?

At 44ppm you will be getting through 13000 Litres per month 
Are you sure of your figures, thats an awful lot!

If so then you need an industrial unit.

We use approx 4000 litres a week 

[Cliff perkins]

Looks like i will be getting a 40 40 when i need to replace my merlin filters then.ive had the filters in it a year now and there still ok.

[SPE]

try an ez pure commercial ro
http://www.cleanitup.co.uk/smf/index.php?topic=147725.0
and let clarkey know what you think of it 

[Cliff perkins]

Lol  :

[Xtremely Clean]