When a hidden pipe turns up in a wall you want to knock down, it's going to cost you.

The sign about the cable crossing was a device to keep boats from dropping anchor too near the warehouse and discovering the presence of the hidden pipe.

When deciding on the location for the wall inlets, keep in mind the ease with which you will be able to connect the hidden pipes.

High-powered spray hissed out from hidden pipes lining the sides of the corridor, battling the flames and quickly extinguishing them.

It's a device for locating hidden pipes, live cables, metal framework around windows, etc.

The detective had left Clussig's apartment with thoughts of hidden pipes and mechanical artifices.

The pumping station that had been blinking and humming when Miles had first passed that way was now at work, lifting Thames water to high-tide sea level through hidden pipes.

Refusing, as the days slipped past, to dance to what might be someone else's tune, however seductively the hidden pipes might play.

Creep had tapped some hidden pipe, for The Shadow could scent the odor of ordinary illuminating gas.

In Budapest, the eye is drawn to seven magnificent bridges over the Danube, but hidden pipes are spitting the raw sewage of two million inhabitants into the water.