[Clear Vision]

I tried out my new back pack first thing this morning with tap water. (it was quicker)

Anyway, the glass is now completely dry and there is not 1 spot!!! Honestly!

I couldn't believe it. Why is this? Will I throw all my di bottles away and my ro unit?

My tap tds is usually anywhere between 026ppm & 036ppm

Any ideas?

[Moderator David@stives]

26 is extermely low and you could probably get by with it, but you have to be 100% sure.

Not all glass will dry perfect with tds of 30.

Dave

[Jeff Brimble]

You have softy water with very little calcium and yes it looks like you dont need all the filtering- lucky person you.

[Clear Vision]

So would I be safe to use my tap water or just to be on the safe side di it down to 000ppm?

[macmac]

I would certainley stop using RO & use 2 x 11Ltr DI & have all the bennefits of pure water on demand. that is seriousley soft tap water!
I would estimate with a DI only set up you would only use at most 2 bags of resin per year.

tony

[Clear Vision]

Not all glass will dry perfect with tds of 30.

Dave

You have a point there dave!!!

[jouk45]

bring it down mat to 000ppm, it basicly costs you nothing,
my water was 26 now suddenly gone up to 46 very strange,
so it can fluctuate up or down,

[Clear Vision]

I would certainley stop using RO & use 2 x 11Ltr DI & have all the bennefits of pure water on demand. that is seriousley soft tap water!
I would estimate with a DI only set up you would only use at most 2 bags of resin per year.

tony

I bought a ro over a year ago now fo £70 off ebay. I only had to replace one of the filters and that was only £6.

So thats even cheaper than the 2 bags of resin you estimate I would go through in a year

My 1000L tank takes ages to fill up through my ro. 4 days!!!!!

[Clear Vision]

bring it down mat to 000ppm, it basically costs you nothing,

I suppose it's better safe than sorry

[Londoner]

Where are you ?

[Clear Vision]

You should know!!!

You sent me a flyer. Remember?


Inverness in the highlands

[macmac]

I would certainley stop using RO & use 2 x 11Ltr DI & have all the bennefits of pure water on demand. that is seriousley soft tap water!
I would estimate with a DI only set up you would only use at most 2 bags of resin per year.

tony

I bought a ro over a year ago now fo £70 off ebay. I only had to replace one of the filters and that was only £6.

So thats even cheaper than the 2 bags of resin you estimate I would go through in a year

My 1000L tank takes ages to fill up through my ro. 4 days!!!!!

But just think, no 1000ltr tank & all gubbins that go with it. never run out of water, just top up from customers outside tap, just fill your tank in minutes from your own outside tap etc. All for about 150 quid per year! 
You would probably only use 1 bag, my tds is 105ppm & i use 2 bags per year, so that would put it down to 70 quid + vat.


tony

[Clear Vision]

I agree.

I used to use a small di vessel from cleantech. I cant remember what size it was. (must be at least 11-15 inches tall)

Although my tds is low I still used to go through a fair bit of resin??? And I was always worried about the tds rising!

Any tips?

[macmac]

I agree.

I used to use a small di vessel from cleantech. I cant remember what size it was. (must be at least 11-15 inches tall)

Although my tds is low I still used to go through a fair bit of resin??? And I was always worried about the tds rising!

Any tips?

Yes
use 2 vessels in sequense, use dowex resin not purolite that cleantech sell (its cheaper & lasts far longer).
Also there is a way of making resin last far longer nowadays, just giving the vessel a realy good shake up (mixing all the resin up inside) brings the tds back to 000 once it has risen to an unacceptable level, then repeat over time untill it has totaly spent.

I can guarantee you, doing the above that you'll be amazed at how long the resin lasts. you worried about the tds rising? thats a problem with purolite resin. once the tds hits 001 in no time it just shoots up 005, 010, 020 etc. where as dowex, once it hits 001 it stays there for ages, days, & then gently rises giving you plenty of time & notice to shake the vessels.

tony

[Clear Vision]

Thanks tony.

I still have the 2 di vessels but I will need to get a sack of resin.

Why do I need 2? is 1 not enough. Where would I place the 2?

Do you use the hozelock fittings on the di bessel? I used to find they would leak ar would you just put the hose straight onto in and use a o ring or a jubilee clip?

Matthew

[Dean Aspects]

My tds is 0nly 35ppm and i use an ro that i got when i got my first trolley system 18 months and never had to change the filters if i run out of water i can fill up at a customers tap and have only once had to change the resin in the vessel once and its a small one

i think i must have the purolite resin because when the ppm went up it shot up very quickly

so macmac you say the dowex resin lasts much better?
where would i get it then? as i always just use cleantech for my w/c stuff

[macmac]

By using two vessels you can use every last drop of resin up. e.g.

The first vessel takes all the crap out so the second vessel is getting fed with 000tds water, so eventualy, when the shaking of the vessel no longer works (resin is totaly spent) the second vessel will start to rise. this is when you put the second vessel first (swap them round) & put new resin in the old first vessel & put that second. So now your new resin (second vessel) is getting fed with 001/002 tds water instead of direct tap water & you continue this process.
Where as before (with one vessel) when tds hit 001/002 etc you would have had to throw it away but now, it is pre-filtering your new resin vessel.
This process has at least halved my resin consumption.

my vessels are in van, sequense= tank - pump - vessel 1 - vessel - 2 (connected together with 2 inch of standard hose) - hosereel - pole.

Hozelok connectors on pump box & both vessels.

Dowex resin can be bought from other suppliers but i know streamsupplies sell it for 67 quid + vat.

[L.Doubtfire - The Blade Runner]

Fella`s,why when after youv`e used resin to bring the water down to zero reading,
It will start climbing up again after a period of time? I make my water thru` R.O.
And after I`ve made any quantity,once the water is made its 000ppm.I keep some
Of it for quite awhile but it still stays put at zero reading.Thanks

Lewis Doubtfire

[Paul Coleman]

I would certainley stop using RO & use 2 x 11Ltr DI & have all the bennefits of pure water on demand. that is seriousley soft tap water!
I would estimate with a DI only set up you would only use at most 2 bags of resin per year.

tony

I bought a ro over a year ago now fo £70 off ebay. I only had to replace one of the filters and that was only £6.

So thats even cheaper than the 2 bags of resin you estimate I would go through in a year

My 1000L tank takes ages to fill up through my ro. 4 days!!!!!

I'm surprised you've bothered with RO but at least you know you can produce water pretty cheaply if RO is ever out of action.

[macmac]

The problem is, is that there is a school of thought, brought on mainley by suppliers, that an RO is nessesary.
Just two examples above show that it is absolutley not.
RO systems bring far more troubles than DI only, for 1 they are more complex, hours to fill tank, waste water, more freezing components in winter, no pure water on demand etc. etc.
Now for some, with hard water, an RO IS nessesary, but for people with soft water, things have changed over the last couple of years & resin cost is not such an issue any more as explained above & there are far more bennefits to a DI only set-up. - Fill your tank in minutes, no waste water, top tank up from customers tap (no running out of water mid-day), no leaving a mains water supply on 24/7, no storage tanks, no booster pumps, no transfere hose etc.etc.

Yes, at the end of the day, to actually purify water an RO may work out cheaper in money terms, but come on, all the above bennefits for the grande sum of 150 quid per year It's a no brainer to me & my TDS tap water is 105ppm, i wouldn't dream of installing an RO.

tony