As the title says my water pressure is a weedy 42psi.
Can anyone recommend an RO for me.
I have had a 450gpd from Pure freedom but its nearly dead and I plan to upgrade.
Years ago I used a merlin but the low pressure meant it made water at 66ppm!
Is the new version better? Don't want to use a booster pump really.
My tap water is a chalky 460ppm.
Any ideas? Cheers
You have two main options:
1. Switch to an Ultra Low Pressure membrane such as the HF5 membranes. These can produce water at down to 20psi input pressure. However on a TDS of 460ppm these membranes would need to be flushed very regularly perhaps 10 minutes for every hour of use. Alternatively fit a softener before the RO.
2. Fit a booster pump and use standard type membranes such as the HF4 type membranes. These can work well down to about 45-/50psi without a pump but under that they ideally need a pump. This set-up would not need flushing as often perhaps only 30 minutes per week with a 5 minutes flush before each production cycle.