From Longman Dictionary of Contemporary Englishwater pipeˈwater ˌpipe noun [countable] 1 an underground pipe used to carry the public water supply2 
DFTa pipe used for smoking, consisting of a long tube and a container of water SYN hookah
DFTa pipe used for smoking, consisting of a long tube and a container of water SYN hookahExamples from the Corpus
water pipe• A water pipe jutted from the sandy village main street another half mile to the east.• We used kerosene lamps and stood in line for hours with buckets to draw water from a public water pipe.• Yes, this location of the water pipe is correct. 