From Wiktionary, the free dictionary
From cross + pipe.
crosspipe (plural crosspipes)
- A cross-shaped segment used to connect the ends of four pipes.
2007 June 24, Michael Pollak, “Graffiti Secrets”, in New York Times[1]:The English sparrow, another abundant city species, also loves streetlights and lampposts, especially those with crosspipes open at the ends.