[Alex Wingrove]

OK

might need to get a new RO, enough to make 1500-2500l a day, well i say a day, as fast as possible (no merlin)

it has to a shut off valve when the tank is full,
has to have DI
has to have auto flush,

what could i buy?

Thanks

Alex

[SherwoodCleaningSe]

Go 4040, then just get a di vessel.  If you can put a booster on it even better.

Heres a 4040 well under a grand

http://cleaningspot.co.uk/acatalog/RO_system_spare_parts.html

Simon.

[Alex Wingrove]

ok so how much for the booster pump, these things can take upto 150psi right?

auto flush and auto shut off

[alanwilson]

http://www.gapswater.co.uk/acatalog/copy_of_Reverse_osmosis_kits.html

go for the basic twin RO - and ring June, tell her you want the stainless steel housing for the same money!

for a booster pump this will do fine

http://www.machinemart.co.uk/shop/product/details/cpe120-1in-self-priming-water-pump

or

http://www.machinemart.co.uk/shop/product/details/tam120-11-2in-230v-centrifugal-water-pum this is probably a better pump for the job.

All in you'll still have change from a grand and will make around 300ltrs/hr easily = 7200ltrs a day.

Alternatively you could just go for a single 4040.

Before you buy a pump though, check your water pressure at home, if its over 60psi you don't need a pump.

[alanwilson]

sorry just reread the post - you need a di - look on ebay (guy there sells them for £35) search under DI filter.

Auto shut off - 12v solenoid kit

http://www.stcvalve.com/Process%20Valve.htm?gclid=CNq7jP-huJICFQN0sgod1W0FQQ

you want to order one that is normally closed and a vertical/horizontal level switch - they're easy to install.

[Alex Wingrove]

that is loverly thanks for the info,

i heard that i could get 4l a minute from a single, didn't know if this was accurate as my tap is about 215ppm and it comes out through my normal 300gpd ro at 1 or 2

the solenoid wont effect my ibc will it? i will definitely be able to fill it up to 1000l?

i heard ro man do a auto flush for £20, any good?

[Alex Wingrove]

are 20 inch pre filters better than 10?

[alanwilson]

the 20inch prefilters last roughly twice as long - they're twice the price too - however I would recommend them as the more contact area for water/carbon the less likely you'll get chlorine in the membrane.

the IBC will still fill to 1000ltrs - actually a bit over it and you need to make sure you position the level switch at the lowest point of the top of the IBC so that it can't overflow.

so what do you think - twin RO?

Our twin RO (we have a merlin as well - very good) is twin stainless steel with desal membranes, a grundfos pump (expensive) and 10inch prefilters, we run it at 85psi - 95psi and it makes around the 300ltr/hr mark.  If i turn the pressure up to 100psi it makes about 450ltrs/hr but I prefer more waste water.

[Alex Wingrove]

I like the idea of twin RO, the more pressure i put through i get more water, but does this also take away some life from the membrane?

Also if i have an auto flush and the larger membranes, will i be able to make a membrane last 2 years?

[neil100]

I have a 4040 Ro. I can fill my 1000ltr tank in 4 hours.

My water pressure is low so I use a Booster pump. The Booster pump lets you produce more water per minute as it pumps more water into the Ro memmbrane. The memmbrane works more efficently the higher the pressure. So your memmbrane will last longer if you use a booster pump.

I have this pump,http://www.machinemart.co.uk/shop/product/details/cbm240e-1in-multi-stage-230v-booster-pum/path/booster-centrifugal-pumps

It comes highly recommended. I have my valve set on permenant flush when filling my Ibc tank and I can still produce 240 ltrs an hour. The reason its set to flush all the time is to preserve my memmbrane, my first memmbrane only lasted 18 months. Some expensive lessons learned.

My current memmbrane is 11 months old. I dont have a Di tank attached to it as It produces 0 tds from an average of 100tds, though I have di tanks in the van as I still want the water to go through resin.

A quality pump is a must and reguler changes to your pre filters will preserve your investment.

Regards Neil.

[Alex Wingrove]

20" prefilters, how long can i expect them to last making 6500l a week,

how does constant flush work?

[Alex Wingrove]

i guess you all hate me dont you

i expected more from you NWH,

oh well

[NWH]

 

[Alex Wingrove]

dont act all sheepish now, you had your chance

[SherwoodCleaningSe]

20" prefilters, how long can i expect them to last making 6500l a week,

how does constant flush work?

i guess you all hate me dont you

?


If your making that much water I'd change the prefilters every 3 months.  I'd also seriously consider investing in a water softener depending on what you tap tds is of course.

Simon.

[Alex Wingrove]

tap tds is 215,

every 3 months!!!!


even 20inch ones?

[NWH]

dont act all sheepish now, you had your chance

Sorry Alex,i would go to Gaps water and speak to June.They have a really good after sales rep,and will talk you through any problems over the phone.If you`d had said a month ago you could have had my 40x40 with pre filters off of me.

[NWH]

Make a point of changing the pre filters regardless of quality at a set time that way your saving the membrane.

[Alex Wingrove]

dont act all sheepish now, you had your chance

Sorry Alex,i would go to Gaps water and speak to June.They have a really good after sales rep,and will talk you through any problems over the phone.If you`d had said a month ago you could have had my 40x40 with pre filters off of me.

yeah gaps water was where i was going to buy, but i like to be armed first.

why would you sell a 4040 ro?

unless you bought a systems that does it all for you?

even so, why sell?

[NWH]

It was all on the van mount set up.