plumbing — a small mass of lead or other heavy material, as that suspended by a line and used to measure the depth of water or to ascertain a vertical line. Compare plumb line.
water main — a main pipe or conduit in a system for conveying water.
conduit — A conduit is a small tunnel, pipe, or channel through which water or electrical wires go.
hookah — a tobacco pipe of Near Eastern origin with a long, flexible tube by which the smoke is drawn through a jar of water and thus cooled.
hubble-bubble — a simple form of the hookah, in which the smoke passes through water, causing a bubbling sound.
kalian — a Persian tobacco pipe in which the smoke is drawn through water; hookah.
main — chief in size, extent, or importance; principal; leading: the company's main office; the main features of a plan.
sluice — an artificial channel for conducting water, often fitted with a gate (sluice gate) at the upper end for regulating the flow.
