A siphon buried beneath the water line that enables fire crews to draw, or "draft" water from ponds or other bodies of water located nearby. Such devices are used in more remote locations and are typically used only for interim purposes until a more consistent supply may be obtained to fight a fire.
DRY HYDRANTS
Meaning of DRY HYDRANTS in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012