Hi Steve,
Didnt have time to watch the gardiner video, 30 minutes of my life that i will never get back, although i have a 4040 twin setup that i bought from June at gapswater and set it up how she told me to, it has been running very efficiently for a couple of years without a problem and regarding resin usage i dont even bother to buy it nowadays the maximum tds after ro is about 4 but mostly around 2 or 3. June is a filtration specialist , i would and have followed her setup advice.
Hi Rogue
Just wondering what your tap tds comes out at to gets these results? Mines high 450-600
Need to get a good twin 4040 set up soon
cheers
TLC