I worked in water filtration for 18 years, r/o systems are good but the ones I installed (point of use, not whole house) needed 3 gallons of water to make 1 good gallon of water. I went with a Big Berkey. https://waterfilterguru.com/berkey-vs-reverse-osmosis/ Leaks may happen with the supply lines, the drain line can get clogged causing a leak at the air gap and if shtf you just need to find a water source for the Berkey and not rely on municipal supply.