[JackieW]

From the ''Pure Freedom'' site,

'As a rough guide, for average water preussre and quality in the UK, the 300 GPD unit will typically produce 250 to 350 litres of pure water per day per day. The addition of the booster pump will normally double this amount.''

Where does the 300 gallons come from, when it equals about 1300 litres?

[Blue Frog Systems]

It's US gallons which is less than UK gallons.  They have been tested in labs where they have the time to tweak settings and the temperature of the water to get the best out of them.  It's a con  really.  when I first started I had a 100gpd which worked out to produce what i needed. That's when I found out about pressure and temp effecting the output

[[GQC] Tim]

From the ''Pure Freedom'' site,

'As a rough guide, for average water preussre and quality in the UK, the 300 GPD unit will typically produce 250 to 350 litres of pure water per day per day. The addition of the booster pump will normally double this amount.''

Where does the 300 gallons come from, when it equals about 1300 litres?

With perfect pressure and temps you get 300 US gallons per day.

[Alex Gardiner]

As has been said these are US gallons which equals about 249 UK gallons which equals 1135 litres.

The problem is that these membranes are rated in the laboratory usually based on the following typical set-up.

Input water pressure = 100psi (6.5 BAR)
Input water temperature = 25°C

If the input water drops below these 'ideal' settings the production is rapidly affected. For every 1°C of water temperature drop the production rate will drop by about 5%. Most household supply's input water temperature in the UK is about 8-10°C this in itself will account for a drop of 52% (% has to be taken off accumulatively) in production bringing it down to an output of about 550 litres per day.

Then factor in a pressure drop from the ideal input pressure and this will account for an average production of between 300-600 litres per day from a 300GPD system.

I ran one of these 300gpd systems from many years and because of very high input water pressure where I live (105psi) I was able to get about 900 litres per 24 hour day in the summer dropping to about 600 litres per day in the winter.

[Frankybadboy]

As has been said these are US gallons which equals about 249 UK gallons which equals 1135 litres.

The problem is that these membranes are rated in the laboratory usually based on the following typical set-up.

Input water pressure = 100psi (6.5 BAR)
Input water temperature = 25°C

If the input water drops below these 'ideal' settings the production is rapidly affected. For every 1°C of water temperature drop the production rate will drop by about 5%. Most household supply's input water temperature in the UK is about 8-10°C this in itself will account for a drop of 52% (% has to be taken off accumulatively) in production bringing it down to an output of about 550 litres per day.

Then factor in a pressure drop from the ideal input pressure and this will account for an average production of between 300-600 litres per day from a 300GPD system.

I ran one of these 300gpd systems from many years and because of very high input water pressure where I live (105psi) I was able to get about 900 litres per 24 hour day in the summer dropping to about 600 litres per day in the winter.

your getting good at this alex,

ps thanks for the hat

[Dave Willis]

You can't have a hat - we'll look like twins!


Actually, mine's rather faded now.

[Frankybadboy]

You can't have a hat - we'll look like twins!


Actually, mine's rather faded now.

should we get a picture done and send to are mate hydro