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It all depends on what RO you use really.As a guide a 100 GPD one will stick around 3000 litres down the drain for every 1000 litres you produce. A 200GPD around 1500 to drain. a 300 GPD around 1000 to drain.A merlin around 3000 litres to drain (Could be up to 5000)A decent 40 inch system around 1000 litres to drain.Now all you need to know is what your water company charges you for 1000 litres from the tap. How much pure you need a day and you can work it out.Ohh a DI only set up will have no waste but only really usable economically up to 100 PPM from the tap. Hope this helpsAndrew
Quote from: Andrew McCann on November 17, 2008, 08:15:43 pmIt all depends on what RO you use really.As a guide a 100 GPD one will stick around 3000 litres down the drain for every 1000 litres you produce. A 200GPD around 1500 to drain. a 300 GPD around 1000 to drain.A merlin around 3000 litres to drain (Could be up to 5000)A decent 40 inch system around 1000 litres to drain.Now all you need to know is what your water company charges you for 1000 litres from the tap. How much pure you need a day and you can work it out.Ohh a DI only set up will have no waste but only really usable economically up to 100 PPM from the tap. Hope this helpsAndrew Thanks AndrewReally useful info cheers!(I knew my merlin was rubbish!) so much waste!
bloody hell, cant believe the waste ammounts, im just going to wfp got a ro-mam 300 gallon, you mean for every 1 lit you get 3 lit waste??
i have a 300gpd and i have just moved, i had my first water bill.... : ::)400squid for 4 months oh well its another taxable expense
Quote from: p holley on November 17, 2008, 09:58:48 pmi have a 300gpd and i have just moved, i had my first water bill.... : ::)400squid for 4 months oh well its another taxable expense if the bill is that much, would it be cheaper just to run di only.
Is there a new ro unit , just been developed in america.. with zero waste Andrew.