Would you drink from this rusty old jam tin? The strange thing is that most of us drink from badly corroded water pipes in worse condition than what you relaise, that have been lying underground for years. Check with your local plumber about the conditions the water pipes in your area. I'm sure that you would be hesitant to drink water from a tap that looks old shabby. Yet you would drink from a new shiny chrome tap without hesitation even though they are connected to the same old rusty water supply pipe.