[darren clarke]

yes this will be fine

[Sunshine/Cleaning]

Thanks for the reply Soapsuds.

[Craig Trevain]

There's hard i.e 180 and hard i.e 450 like here in north Essex so how can one put a per house price on  this.

[paul rulton]

There's hard i.e 180 and hard i.e 450 like here in north Essex so how can one put a per house price on  this.

cause they aint gotta clue...  & just wanna sale. sounds good... not!   :

[Paul Coleman]

Well the maths would go something like:-

500,000/300(TDS) = 1,667 (litres of pure water per 25kg bag).

So roughly speaking, that's £75 to make 1,667 litres.

That is about 22 litres per £1.

If you take 15 litres as being a standard 3 bed semi, that would be about  66p per house.
Even allowing for cheaper resin and a bit lower water usage, it isn't easy to see where the 16p figure comes from.
I suppose if the cost of membranes/prefilters/small amount of post RO resin were factored in and subtracted from the resin only cost it could come down further.
However, to factor in the initial cost of the RO would be wrong IMO as housings and tubing last for years (freeze-ups excepted).

[Michael Smallwood]

I do a small amount of window cleaning along with other cleaning. My tap water is around TDS 275 and I use DI only. I keep my costs down by using rainwater with a TDS of 20 for as much as possible. (about 40%)

The DI units are 8l plus 2x 1l

So far I have produced 500l on the same resin.

If work volumes pick up I would get a RO system

Cheers

Mike

[Martin ccs]

at the mo i manage on di only.

tds is about 230 - 300.

i use around 600 litres a week - tops only tho!

a 25ltr tulsion resin bag a lasting me around 2 months with using a 11ltr vessell.

if use two vessells it will last even longer - but bare in mind i wfp tops only!

[Scrimble]

I use a 300gpd RO from pure freedom with a booster pump, makes 200 litres in 5 hours, goes in at 280tds comes out as between 1-5

i bought a 25kg bag of resin 6 months ago and have hardly used any of it,

sod DI only lol waste of money.

[Michael Smallwood]

Above certain volumes RO makes sense.

I have been told that the membranes need to have water passed through them frequently or they will dry out and they are expensive to replace. Since I only use wfp occasionally I have stuck to DI.

Cheers

Mike