[mark coates]

Iv noticed that just about all of the wfp van setups have the DI unit in the van. I was wondering would it not be easier to filter your water through your DI unit at home before you store it in your static tank therefore you would have pure water tds reading 000 straight in your tank to pump onto the windows.

This makes sense to me but if no-ones doing it im wondering if its possible. Im only askng because Iv just bought a van and Im busy trying to set up my own system. Any advice would be very much appreciated.

[paul mather]

Yes of course it's possible & in my view a lot less hassle & probably cheaper too,
It's how I run my system bought from Gardiner's

[DaveBrown]

The Di doesnt affect the flow so I think its better to have it as close to point of delivery as possible mate. Then you know its pure.

Dave

[AuRavelling79]

I produce at home and put in the tank at 000.

[freshwater]

M,

If your van tanks are clean and your tanks at home are clean then have the DI in between the RO and your tank. The slower you run water through the DI the longer it will last. When you run water quickly through any media you tend to get channelling where the water finds the shortest path from the inlet to the outlet which is a straight line and as such will not come into contact will all the available beads of resin. Running slowly tends to allow the water to pass over more beads of resin and use up more of the exchange capacity. If you are concerned about your final water quality the have one at home and one in your van.

steve@freswatersystems.co.uk

[Clear Vision]

I have a small 5 stage ro sytem and a 1000L tank out the back of the garage! After the water passes through my ro it's 100% pure! 000ppm. Then I transfer to the van where I have a small di vessel built Into my setup. So the water that pases through the vessel Is 000ppm meaning that I will (should) always have pure water reading 000ppm. And hopefully because the water reads 000 before passing through the vessel the ressin should last long! (I hope?)

Matthew
Clear Vision

[neil100]

I have a Di tank that works with my ro unit in the garage. So I was transferring pure water into my van tank for 6 months. The di vessels are in my van in case I ever need to top up at work. Though I have never topped up in 8 months.

I have stopped useing my Di vessell in the garage for the last two months as the resin went. I am now useing up the resin in the van, when that expires I will replace the resin in all three di vessels.

Mind you my tds reading just from my ro is between 7 and 9.

Nel.

[welmac]

i have the DI unit in my van to be 100% certain that my water is 000ppm when it leaves this. you could pick up unwanted rubbish from your static tank on the way to your van tank.

Just want to be on the safe side! 

Gary - WELMAC SYSTEMS

[JM123]

we run the water from the merlin through an 11ltr di then into storage tanks, from there into del tank and finally through a 4.6ltr di before pump.

[paul mather]

Why do you need 2 DI units? Seems a complete waiste of money if you ask me.
If you only ever put pure water into your tank in the van then what impurities can you possibly pick up & if you do pick up the odd thing then as long as your water is as near to zero as poss then I don't think you have too many worries.

All these extra things cost money which I personally would rather spend on something a lot more interesting!!

[JM123]

hi paul, in effect the extra di vessel is a one off payment, we check the tds in the holding tanks once a week - nearly always 0ppm, however, having the smaller 4.6ltr before the pump means that the possibility of any contaminated water reaching the glass is virtually removed, also as the water is generally 0ppm in the holding tanks the resin in the 4.6ltr vessel isn't being used very quickly and so will last much longer.  Over all the extra cost is negligeable.

[paul mather]

I still can't see the point though, you can't get any cleaner than a reading of 0ppm so why put it through another DI?

I think if we are not careful we can make this WFP lark more expensive & more complicated than it needs to be.


My WFP system is there to benefit me & my family not make suppliers richer!

[Clear Vision]

Paul go back to bed!

There IS a point of having an di vessel In the van just after the pump! It's only a one off payment for a reconditioned di vessel (£50) and If the water Is running through that at 000ppm or 001ppm the ressin will last for ages.

It's for peace of mind more than anything.

[paul mather]

If the water Is running through that at 000ppm or 001ppm the ressin will last for ages.

So why do you need it then, it makes no sense. You can happily clean windows with a TDS rating of up to 9 or 10.

I'm not having a go I just don't understand that's all.

[petski2]

I agree with you here Paul.
I run my water through the Merlin then through a DI vessel to bring it down to 000.
This goes straight into the tank all in one movement.
The water in the tank is now 000 so why bother putting it through another DI vessel.
It has no function whatsoever so it has to be as Clear said simply for peace of mind. :

[Clear Vision]

So why do you need it then, it makes no sense. You can happily clean windows with a TDS rating of up to 9 or 10.

I'm not having a go I just don't understand that's all.

Oh come on chief!

Please correct me If I'm wrong but the whole Idea of this purified water system Is that the water we use Is PURE

So If your using water that Is 009ppm or 010ppm that Is not pure Is It

If I tell my customers that I use a "pure" water fed pole system and use water above 000ppm I would be deceiving them?

I don't do a "heath roberts job" and I will allways use "PURE" water on my jobs!
0If you want to use water above 000ppm thats up to you.

All I am saying Is that I want 100% pure water on the windows and I will go to every extreme to get this! And for the cost of a reconditioned di vessel which should last a lifetime and maybe the odd ressin change over the year, (£50) that Is verry little to put out.

[JM123]

Its only for peace of mind, a one off cost.  It also means that should we run out of pure water at the end of the day we can run a small amount of tap water into the tank to finish off the job in hand instead of having to drive back to the yard to fill again, granted just using the single di vessel is enough but for the sake of one small one off payment I think the peace of mind more than makes up for the cost - plus it has already saved me once while out working, needed to finish a job, ran out of water, put a little tap water in, got the job finished - saved me about £45 in working time not having to go back to the yard to fill up again.