Mud & silt and rust is in almost all of Aucklands reticulation. Removing this debri then taking out the chlorine ... easy. Take out the debri with a 1 micron melt blown cartridge. Then take all the chlorine out with two carbon cartridges. Then finally polish the water before sending into your house. Using 10" or 20" Jumbo Filters with 1" piping, you deliver great flow rates to the shower and taps. No more twindling thumbs waiting for the underbench filter tap to fill the jug or spud pot.