2. WOOD PIPES
In the early days of New York Citys gas network, the mains
were made of wood. This practice continued into the 1950s. Rich
natural gas, first piped from the Gulf of Mexico in the 1950s, is
drier than its manufactured predecessor, and the leaking wood mains
were no longer suitable. Their replacement, brittle cast-iron pipes,
are now giving way to plastic and steel.
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