VYAIR compact 4 stage RO system with DI set up

[@musho0007]

How many litres do you get per cartridge(s) before having to change? and how many of the 4 cartridges do you have to change? Ta

[@ste5210]

Hi how fast should the water come through the blue pipe

[@johndavies4644]

Just checked my lfs ro tds. 71ppm