[Ajpick]

Hi everyone,

I set up my ro system yesterday, up till now been using a trolley and di.
I was shocked at how much water comes out of the drain pipe. For one litre of pure there must of been 10's of litres of waste. Is this correct or have I done something wrong?

My pressure reading is about 40psi when flowing round the ro, does this make any difference?

Thanks

[johnny bravo]

i use my ro in my litchen via sink,    using a diaphram pump i recycle my waste water so it goes back through ro  to become pure , i dont waste it, i then fill 25 litre drums up. to store.  so my waste comes out and goes back in again continuously

[Paul Coleman]

Hi everyone,

I set up my ro system yesterday, up till now been using a trolley and di.
I was shocked at how much water comes out of the drain pipe. For one litre of pure there must of been 10's of litres of waste. Is this correct or have I done something wrong?

My pressure reading is about 40psi when flowing round the ro, does this make any difference?

Thanks

Too much waste.  Waste will normally be 1:1 or, at most, maybe 4 or 5 waste to 1 pure - depending on the type of RO.
Hard to say what is wrong - especially without knowing RO type.  Is there an adjuster valve that you've left fully open instead of slightly open?  Have you got it in "flush" mode?

[Window Washers]

What RO is it ?

[Ajpick]

http://www.thecleaningwarehouse.co.uk/new-300-gpd-ro-system-1863-p.asp

This is the link for the RO I purchased.

Thanks everyone for your help so far.

[gto]

i use my ro in my litchen via sink,    using a diaphram pump i recycle my waste water so it goes back through ro  to become pure , i dont waste it, i then fill 25 litre drums up. to store.  so my waste comes out and goes back in again continuously

i don't understand, this.
the waste  has to be removed, all your doing is recirculating the waste and forcing it into the mebranes.
you may be saving some water but killing your RO.

[Window Washers]

i use my ro in my litchen via sink,    using a diaphram pump i recycle my waste water so it goes back through ro  to become pure , i dont waste it, i then fill 25 litre drums up. to store.  so my waste comes out and goes back in again continuously

i don't understand, this.
the waste  has to be removed, all your doing is recirculating the waste and forcing it into the mebranes.
you may be saving some water but killing your RO.

thats exactly what I was thinking, so long term costing himself money

[Paul Coleman]

http://www.thecleaningwarehouse.co.uk/new-300-gpd-ro-system-1863-p.asp

This is the link for the RO I purchased.

Thanks everyone for your help so far.

If there is no adjuster valve (I wouldn't expect one on this unit), I wondering if you've connected it up properly.  Maybe phone the company you bought it from?

[Ian Lancaster]

Have you actually measured the flow ratio?  Run the pure and the waste into a couple of containers, the waste into one several times larger than the pure.  When the container with the pure is full (it only need to be a couple of lts big) stop the unit.  Chuck the pure away, then start pouring the collected waste into the pure container.  Count how many times you can fill the pure container with the water from the waste container.  That will give you the ratio.  If it's not more than about 3:1 it's probably about right.  If it's more you've either made a mistake in setting it up, you've got your flush valve open or the restrictor is faulty.

[Window Washers]

Have you actually measured the flow ratio?  Run the pure and the waste into a couple of containers, the waste into one several times larger than the pure.  When the container with the pure is full (it only need to be a couple of lts big) stop the unit.  Chuck the pure away, then start pouring the collected waste into the pure container.  Count how many times you can fill the pure container with the water from the waste container.  That will give you the ratio.  If it's not more than about 3:1 it's probably about right.  If it's more you've either made a mistake in setting it up, you've got your flush valve open or the restrictor is faulty.

or you could just get a measuring jug and time it, thats what I do a lot simpler

[Ian Lancaster]

Have you actually measured the flow ratio?  Run the pure and the waste into a couple of containers, the waste into one several times larger than the pure.  When the container with the pure is full (it only need to be a couple of lts big) stop the unit.  Chuck the pure away, then start pouring the collected waste into the pure container.  Count how many times you can fill the pure container with the water from the waste container.  That will give you the ratio.  If it's not more than about 3:1 it's probably about right.  If it's more you've either made a mistake in setting it up, you've got your flush valve open or the restrictor is faulty.

or you could just get a measuring jug and time it, thats what I do a lot simpler

Can't quite grasp how that gives you the pure/waste ratio?

[Window Washers]

Have you actually measured the flow ratio?  Run the pure and the waste into a couple of containers, the waste into one several times larger than the pure.  When the container with the pure is full (it only need to be a couple of lts big) stop the unit.  Chuck the pure away, then start pouring the collected waste into the pure container.  Count how many times you can fill the pure container with the water from the waste container.  That will give you the ratio.  If it's not more than about 3:1 it's probably about right.  If it's more you've either made a mistake in setting it up, you've got your flush valve open or the restrictor is faulty.

or you could just get a measuring jug and time it, thats what I do a lot simpler

Can't quite grasp how that gives you the pure/waste ratio? i time the fill to a litre mark on each pure and waste

I time the fill time for a litre waste and pure seperatly then do the maths

[johnny bravo]

the waste water recirculating cant do any damage to membranes , its going back through the membranes as water but not as high tds, it mixes with the tap water recirculating through  the   ro,     i cant see how this could damage membranes.  these are my thoughts unless anyone can prove otherwise.

[Window Washers]

the waste water recirculating cant do any damage to membranes , its going back through the membranes as water but not as high tds, it mixes with the tap water recirculating through  the   ro,     i cant see how this could damage membranes.  these are my thoughts unless anyone can prove otherwise.

next ti me you make some water test the tds of the waste, doing this will clog up the membrane as the particals need to go somewhere hence the need for waste.

No need to prove it mate think about it logicaly

[Total shine cleaning services]

You should have an adjuster screw on your ro for turning the waste up and down, if u can't find it give streamline a call, mine is located on the small black housing unit that sits independently on top

Graham