Replacement cooling pipes

[darrsi]

You can use water it won't boil because the cooling system is pressurised so the boiling point is raised but water corrodes metal and freezes at too high a temperature so you shouldn't use it on a road bike

So his issue stems from an incorrect/weak mix over time then?
Can't say i've ever used water on its own because it makes zero sense when coolant/antifreeze does what it says on the bottle.