[S.A.J]

I’ve been using 2 Dis for 6 weeks now and have not changed the resin yet.

I have 2 20L vessels side by side.

My tap tds at present moment is 096 ppm

Tds coming out of the first di vessel after 6 weeks is 060 ppm and then we have pure water coming out of the 2nd one at 000 ppm.

This is the first time I have run a di system so can’t really comment on what savings we are going to make.

We are hoping to change the resin in the first di every 3 months.

Stuart 

[JSMC]

plan on having 2 di tanks and my tds is 28ppm from the tap

[darragh windows]

what you find though is that the tds of the second has gone up before the first one is completely depleted, eg

ro - 015ppm
di 1 - 010pp,
di 2 - 004ppm

this happens with us every time - thats why we have the extra di in each van.

thanks

I'll second that, i'm di only with tap tds 90ppm, using dowex resin my first vessel usually only reaches between 005-010 ppm before thesecond one starts to hit 001.

I've more than doubled my resin life since switching to 2 vessels 3.5 years ago. 2 x 11Ltr ones mine.

Tony
[/quote




my tap tds is 50 ,only tested this once before as i previously used ro. second resin tank  tds35 first tds2    both 11 litre tanks filled with 8 litres of dowex resin each

Bet your resin vessels are not on your van are they?

Tony

my resin vessols are in my van why do you ask

[macmac]

What is the flow going through the vessels, is it from the mains to fill tank or from your pump?

Tony

[S.A.J]

What is the flow going through the vessels, is it from the mains to fill tank or from your pump?

Tony

Mine is from ma pump.

[darragh windows]

What is the flow going through the vessels, is it from the mains to fill tank or from your pump?

Tony

mine is from my pump too

[Nathanael Jones]

Keeping the flow rate low defo helps the resin last longer. I've got 2 vessels in the van, an the RO/static tank in the garden. I purposely bought a low flow submersible pump for filling the van. It takes about 90 minutes to fill 400 litres in the evening,... but even with a bad RO and low pressure giving me 40ppm before DI, I haven't changed the resin in over 6 months,...