RO help for a newbie

[spruce]

Come to think of it @Paul Symonds, our 'mates' at Brodex do a 12v portable 4040 system.

https://brodexbms.co.uk/product/portapower-trolley-system-12v/

I don't know what pump they use, but again this isn't designed for continuous use a booster pump is designed for. When we clean windows we estimate that on a compact round our experience is that our pumps work for around 50% of our actual working day. The only time that changes is when we do a large commercial where we estimate that 70% of the day is actually cleaning windows.

Notice how Brodex don't include a carbon block filter with there systems.

 

[Pjj]

Your prefilters should last longer between changes as they aren't processing as much water. If your current ratio is 2 waste to 1 pure and you restrict the waste to 1 waste to 1 pure then then prefilters will have to process 1 litre of water less for each litre of pure you make.

I personally think that @Pjj is extremely fortunate as his supply water is soft and is probably very low in the dissolved solids that block up membrane pores, such as calcium. The very fact that his membrane has lasted as long as it has is testimony to his situation being one of uniqueness.

This subject was discussed in great detail on CIU quite a number of years ago. The general concensious back then was restricting the waste saved water costs, increased resin costs and reduced the membrane's longevity. Of course there was no scientific conclusions as it was each users opinion based on his 'experience'. Users reporting their findings were from all over the country with different compositions of water. 

The discussion also brought up the hot topic of replacing the carbon block filter to its manufacturers declared service life. Some were adamant that replacing the prefilters less often and ignoring service life figures saved money overall even if it meant replacing membranes prematurely.

Yes you you are right we have  virtually no calcium  in the water at all south west water sent me a break down of our water many years ago , it didn’t mean a lot to me then but all the things in the water were a very low reading , in fact I have to put oyster shell in my koi pond filters to make the ph  right for the fish