Cellarers ' & Plumbers ' Guild The Cellarers ' and Plumbers ' Guild was a guild in Waterdeep that dug building foundations and maintained Waterdeep ' s sewer system . Base of operations . The Old Guildhall was located on Gaustus Street in the Trades Ward . Activities . The guild was employed to dig foundations and maintain the city ' s sewer system . They kept the sewers well - maintained . They used secret recipes to perform their maintenance duties and ordered their materials from others rather than making them themselves . Although they didn ' t always do so , the Cellarers and Plumbers had to call the Loyal Order of Street Laborers to fill in any holes that they had dug . Tactics . Frequently , the guild would dig up valuables and corpses during their excavations . They were required to inform the owner of the property beneath which the objects were found but commonly , they did not bother to do so unless being directly observed by said owner . Rumors were rife that the guild created nonfunctional pipelines in the sewers in which they could hide these things . Relationships . Members of the Carpenters ' , Roofers ' , and Plasterers ' Guild were seen as " thick - fingered clods " by the Cellarers and Plumbers but they reserved the majority of their derision for the Loyal Order of Street Laborers , whose formation took profitable work away from the Cellarers and Plumbers . History . In 1356 DR , Orlar Sarluk published a book titled " " . During the Time of Troubles , a large group of Cellarers were lost in the city ' s sewers . Unbeknownst to all , they had been transformed into curst s . In 1367 DR , many Cellarers , including the guildmaster , began to be enslaved by the Savants of the Dark Tide . The Cellarers were the only organized group within the sewers , and the aboleth s of the Dark Tide wanted to keep them under their control so that their presence in the sewers wouldn ' t be detected . In 1479 DR , Laraelra Harsard , daughter of the guildmaster , hired Meloon Wardragon to investigate a problem ( namely a collapsed wall ) for the guild . That event led Laraelra and Meloon to discovering that Vajra Safahr , the Blackstaff ' s Heir , was being tortured in a cellar . The two and their allies eventually rescued Vajra . Members . Most members of the guild were human s , gnome s , or halfling s . However , there were no halfling members in 1479 DR . In spite of their superior skill working with rock , there were relatively few dwarven members of the guild as a result of discrimination by the other races in the guild . Members had to pay five gold piece s to join and guild dues of seven silver piece s per month . In exchange , they were paid two gold pieces per job per day , all of their materials were also paid for and teams were given a ten - gold - piece stipend for food and drink per day , making them the best - paying service guild in the city . The uniform of a Cellarer and Plumber was a deep orange cap and cloak with a red border . They typically wore leather armor and remained armed , to deal with the dangers of the sewers . Leadership . In 1374 DR , the guildmaster had been Master Plumber Hilithiimm Turnstone for many years and he planned to turn leadership over to his son Jhalossan when he retired . As of 1479 DR , the guild was headed by Malaerigo Harsard , the father of the Blackstaff ' s Heir Laraelra Harsard .