[redstarwindowcleaners]

Up to now never had a water meter
new place has one fitted it
 west sussex very hard area
traditionally use around 400 / 500 litres / day

what would be a good set up looking for something compact  and economical
Not to expensive either
Pressures seems a bit better here but would a booster benefit
maybe a merlin or would waste be a issue

[Matt.]

I use a Merlin and wouldn't dare fill up at home as am on a water meter. I fill up on the jobs but all my work is commercial so suits me.
There is a lot of waste with these.

[Perfect Windows]

Up to now never had a water meter
new place has one fitted it
 west sussex very hard area
traditionally use around 400 / 500 litres / day

what would be a good set up looking for something compact  and economical
Not to expensive either
Pressures seems a bit better here but would a booster benefit
maybe a merlin or would waste be a issue

With the hardness we suffer down here, resin is going to cost you a mint, so I suspect an RO is called for.

A booster will definitely improve your rejection rate but what you're looking for is to minimise the waste ratio.  That's purely a matter of how much waste you allow when you set your waste valve.

You can reduce the waste ratio as far as you like but it'll be at the cost of a shorter membrane life.  However, with water at the price it is, you'll almost certainly be better off minimising your waste even if you need to buy more membranes.

One thing you can do is to call your water supplier (which I guess would be Southern Water - 0845 278 0845) and get them to send you a non return to sewer form.  Fill it in in the day you receive it, as they won't backdate claims.  What it does is reflect the fact that you're not using the sewers to dispose of the waste from a RO unit.  That's as simple as making sure that the waste runs into your garden rather than down a drain (they may inspect to check).

Southern Water are astoundingly amateurish about this; they just seem to want to deal with your estimate, but the franchisees all have meters on their  pipes, so we're hoping to get an accurate number at the end of the year.

Is it worth getting a non return to sewer form?  Well, Southern Water's charges are currently £1.20 for water coming in and £2.27 for water going down the sewer, so you'll save around 2/3 of your water costs by getting one.  The hassle is definitely worth it.  Using your numbers and a 1:2 pure:waste ratio, you'll be running 1.5m³ every day that isn't ending up in the sewer, so at 230 working days a year, you'll save 230*1.5*£2.27 = £783.  Believe me, Southern Water make it difficult but nearly £800 a year has to be worth the hassle.

Vin

[redstarwindowcleaners]

 Thanks for the imfo
never knew you could do that
Cheers

[Window Lickers]

June at gapswater is of the opinion that a booster pump on a 4040 wont improve rejection rate, it just speeds the amount of pure made over any given period of time.

[robert mitchell]

Wether it improve rejection rate depends on the type of membrane and the water pressure you had without a pump .

I have 20 psi from my tap , with a booster it halves the tds of the pure output

[HampshireWindowCleaning]

Do they not make you go on a commercial tariff once you've told them you use the water for window cleaning? This is why i've never bothered as I wondered if i'd end up paying more for the water?

Up to now never had a water meter
new place has one fitted it
 west sussex very hard area
traditionally use around 400 / 500 litres / day

what would be a good set up looking for something compact  and economical
Not to expensive either
Pressures seems a bit better here but would a booster benefit
maybe a merlin or would waste be a issue

With the hardness we suffer down here, resin is going to cost you a mint, so I suspect an RO is called for.

A booster will definitely improve your rejection rate but what you're looking for is to minimise the waste ratio.  That's purely a matter of how much waste you allow when you set your waste valve.

You can reduce the waste ratio as far as you like but it'll be at the cost of a shorter membrane life.  However, with water at the price it is, you'll almost certainly be better off minimising your waste even if you need to buy more membranes.

One thing you can do is to call your water supplier (which I guess would be Southern Water - 0845 278 0845) and get them to send you a non return to sewer form.  Fill it in in the day you receive it, as they won't backdate claims.  What it does is reflect the fact that you're not using the sewers to dispose of the waste from a RO unit.  That's as simple as making sure that the waste runs into your garden rather than down a drain (they may inspect to check).

Southern Water are astoundingly amateurish about this; they just seem to want to deal with your estimate, but the franchisees all have meters on their  pipes, so we're hoping to get an accurate number at the end of the year.

Is it worth getting a non return to sewer form?  Well, Southern Water's charges are currently £1.20 for water coming in and £2.27 for water going down the sewer, so you'll save around 2/3 of your water costs by getting one.  The hassle is definitely worth it.  Using your numbers and a 1:2 pure:waste ratio, you'll be running 1.5m³ every day that isn't ending up in the sewer, so at 230 working days a year, you'll save 230*1.5*£2.27 = £783.  Believe me, Southern Water make it difficult but nearly £800 a year has to be worth the hassle.

Vin

[Perfect Windows]

Do they not make you go on a commercial tariff once you've told them you use the water for window cleaning? This is why i've never bothered as I wondered if i'd end up paying more for the water?

Not done it with the franchisees or me and anyway the price is the same:

http://www.southernwater.co.uk/for-business/your-bill-and-account/about-your-bill/our-charges/

Vin

[Perfect Windows]

Just been out to test on my 4040 as it happens to be filling at the mo.  Input TDS 282 today. HF4 membrane.

With booster pump, output TDS 006, Pressure at final filter = 70psi

Without booster pump, output TDS 011, pressure at final filter = 36psi  Waited five minutes after switching hte booster off but don't know if it was still increasing.

Vin

[Window Lickers]

I phoned Gapswater to see about a pressure pump. If I was told it'd improve the final TDS by 5 I think I'd still not consider that sufficient to invest in.  20 maybe but not 5. But with a PSI of 36 anything is going to improve the situation isnt it.

[redstarwindowcleaners]

What do you reckon is the best  pure water system to use  /  buy considering the following

poope pressure
hard  water area
water meter
500 litres needed / day system for 3  to 4 days max a week
Got a 100 ibc tank set in a insulated  and heated 10 x 8 shed from which I  can fill my vans tank
My current ro  and Di have served me well  (pre water meter )but  are in need of replacing
What would be a good set up to aquire considering the above
- don't want to break the bank !