MOUNT RAINIER, Md. — When you think of a water main, you probably think of a long, hollow piece of metal.

But a century ago, pipes and mains were made of wood.

The Washington Suburban Sanitary Commission recently stumbled upon a 100-year-old main while digging in Mount Rainier.

WNEW’s Chuck Carroll reports that the antique plumbing looks like a hollowed out utility pole wrapped in wire.

It was taken out of service sometime in the 1940s, according to spokeswoman Lyn Riggins.

She says it was actually kind of a thrilling find for WSSC, since there aren’t many wooden pipes left.

“It’s just a really neat thing to think about how your water was delivered 100 years ago, wood,” she says. But really, “it’s the same technology, just a century apart.”

While the antique pipe is headed for a museum, new ductile iron pipes are being installed in its place.

WNEW’s Chuck Carroll contributed to this report. Follow him and WNEW on Twitter.