[Steve Weatherley]

My tap water reads 379 on the TDS meter. Can anyone beat this? Does anyone have exeptionally good water readings ?

[Davew]

About the same for me in Wilts.

[Chris Cottrell]

mine is about 550 in South Norfolk

[Steve Weatherley]

I thought those of you in the West country get very low readings (around 70 ish)?

[Davew]

Only when you head towards Cornwall. Too much Limestone round here I suspect.

[Steve Weatherley]

Chris

How do you get the reading down to zero?
Just for the record here's what I do......

Water goes through a sediment filter (750 ml)
Then it goes through the Merlin
Then a 750ml D.I chamber (this I have to change every 600 litres!)
After water is pumped out of the tank it passes through 11 litre DI vessel

After this my reading usually comes out between zero and 2.

[Bazzy1999]

mine is about 550 in South Norfolk

Im in North Norfolk and mine is 275

[Davew]

Steve youv'e got problems there are you sure your membranes are operating correctly?

[Chris Cottrell]

Steve

pretty much same as you 200gpd RO Man brings it down to between 7&9 then a 750ml DI

Chris

[Steve Weatherley]

Dave
After changing the resin in the 750ml vessel the reading is usually zero or very low but after I have filled my 175litre tank about 3 times the reading goes up to about 15. This is why I have a 11 litre DI vessel inline between the tank and the microbore.
I was wondering if there was a problem with my RO membranes so have ordered new ones. I also plan to change the system to a static one as I have heard that the Merlin in a van bumping up and down can wear out the membranes quickly due to friction.

[Steve Weatherley]

I am pretty sure that my merlin only brings the reading down to about 50...

[Davew]

I have Ro-man 300 gpd with no di and this gets my tds to five. Small di in my van takes it to zero, havn't changed the resin yet since Feb.

[vwm]

my tap water is 248tds and the merlin brings it down to 11-16 any higher and i just change the filters. then i just di it in the van in a 11L vessel which is lasting me 6mths producing 400-500L a day.

membranes on the merlin should last about 3 years (static) dont like the idea of the ro unit in van

[Clear Vision]

Mine is 025ppm

(Highlands)

[geefree]

mine is 0075... down to zero .. 300 gpd ro man... apart from a freaky day when water shot up to 275....and the ro-man still brought it down to 0003...... i dont use the di unit.

[Russell Macdonald]

Mine is about 290 at the moment, 7 after ro & i only run at 000 after di.

Macc

[craig jwc]

I'm in Newton Abbot near Torquay and my TDS is between 36 - 38

Only have to use DI Bottle and bag of resin last's just under a year.

[D.Salkeld_Ltd]

East of Lincs Wolds and our water is about 300.
BUT it is ful of limescale

And a RO membrane only lasts 6MONTHS until it clogs up with lime

David

[macmac]

A customer of mine in a rural farm house has a natural water supply & the reading is 1500ppm on tds meter. yes 1500. un-known to me till this, as the meter only reads 3 digits it displays 150 then a little  x10 flashes. Fortunatley for them, they now have a mains supply for drinking water which reads 92ppm.

tony

[Davew]

David, how do you know when to change your membranes rather than the filters?