Auxiliary Plumbing Guild

The Auxiliary Plumbing Guild is a chartered body of the Tower responsible for the installation, survey, and periodic condemnation of plumbing networks held to be separate from the Vascular Canons. Its charter, granted under the Twelfth Concordance, Annex 9, describes its remit as "the carriage of permitted fluids in vessels the Canons have declined to recognize." It has 1,340 registered members, a figure last revised in the winter of floor 618 and disputed ever since.

The Guild occupies floors 611 through 619 and maintains a permanent workshop on 611-F, known as the Damp Registry. Its seal shows a vertical pipe crossed by a ledger. The pipes do not presently meet the ledger, a matter taken up at length in the section below.

Origins and the separation from the Vascular Canons

The Auxiliary Plumbing Guild was constituted in the year following the Vascular Reclassification, when the Vascular Canons determined that certain low-pressure networks — cistern overflow, condensate return, and the thin grey lines running beneath the Major Stairs — fell outside canonical jurisdiction. Rather than lose the work, the surveyors who maintained those lines petitioned for a guild of their own. The petition succeeded on the third attempt; the first two were rejected on the grounds that a plumbing guild without canon authority was "a bucket with opinions" (Librarian Calder Indress, marginal note, floor 611 survey file).

The separation was intended to be administrative and quickly became otherwise. The Canons hold that all fluid in the Tower ultimately descends from the Canonical Head, a position the Auxiliary Plumbing Guild has never formally denied and has never acted upon. Auxiliary crews route pipe around Canonical risers rather than join them, a practice the Canons describe as evasion and the Auxiliary describes as deference.

Integration attempts

The Guild has attempted reconciliation with the Vascular Canons four times in its recorded history, in cycles 402, 447, 509, and 601. Each attempt proceeded by joint survey, joint report, and eventual joint silence. The 447 attempt produced a shared schematic, Schematic 447-B, which remained on display in the Damp Registry for eleven years before being quietly rolled and shelved. The 601 attempt convened a Standing Commission on Reunification which met twice, took minutes at the second meeting, and never convened again.

The failure is usually attributed to a difference of method rather than of doctrine. Canonical surveyors measure flow by its destination; auxiliary surveyors measure it by its sound. A pipe that sounds correct but arrives nowhere is, to the Auxiliary, a functioning pipe; to the Canons, it is a fault in the ground. The 509 joint report contains the only recorded instance of both parties signing the same sentence, which reads: "The discrepancy is not resolvable at this level."

"The Auxiliary will not concede the destination, and the Canons will not concede the sound. There is no third thing to concede, and so we adjourn."

— Standing Commission on Reunification, Minutes of the Second Meeting, floor 612

The Ouroboros Motif in Guild schematics

The Guild's drafting conventions are governed by Concordance 31, which requires that every schematic include a diagnostic path by which a fault may be traced from symptom to source. In two documented instances, this requirement has produced what the Bureau of Motifs classifies as a Simple Ouroboros: a diagnostic path that returns to its own origin, so that the schematic describes a pipe that is its own cause.

The first instance was recorded on floor 44 in the Gol77 Alpha cisterns, whose plumbing schematics contained a diagnostic flowchart that inadvertently created a Simple Ouroboros. The second occurred eleven years later in the same cisterns and is catalogued as the second documented instance of the Ouroboros Motif. The Guild has since required that diagnostic paths be walked by a second draughtsman before filing, though the Damp Registry notes that "the second draughtsman is often the first draughtsman, in a hat."

Scholarly opinion divides on whether the Motif is a drafting error or a genuine property of the systems surveyed. The Bureau of Motifs holds the former; the Guild's own historian, Draughtsman Ovell Trant, argued in a paper read to the Guild but not printed that the cisterns "were already circular, and we merely drew them honestly."

Relation to the auxiliary guilds

The Auxiliary Plumbing Guild is a primary guild in its own right and is accordingly entitled to engage the Guild of Factotums for temporary administrative cover during survey seasons. It has done so without interruption since 584, and its Factotum requisitions are among the largest on file.

It is not, despite frequent confusion, a member of the Scrivener's Auxiliary, nor does it have any standing with the Cartographers' Auxiliary, which has twice proposed a joint survey of the flooded understairs and twice been declined. The Auxiliary Indexing Office maintains a partial concordance of Guild pipe designations against the 44-7.B auxiliary filing system, but the concordance is incomplete and the Indexing Guild has declined to certify it.

Records, disputes, and the matter of the unmet ledger

The Guild keeps its own register, the Damp Roll, in which every pipe is entered with its floor, its sound, and a numeral between I and IX denoting condition. The Roll has been kept continuously since the Guild's founding and is the only complete record of the Tower's non-canonical plumbing.

Its authority is contested. The Third Concordance, Annex 4, assigns all fluid records to the Vascular Canons, while Concordance 12, Annex 9, assigns them to the Guild. Both annexes are in force. The Office of Contradictory Instruments has ruled twice that the annexes are to be read together, and has declined to say what reading together would look like. The Guild's position, stated in its standing preface, is that it maintains the Damp Roll "in the confident expectation that one of the two annexes will eventually be withdrawn, and in the meantime because someone must."

Visitors to the Damp Registry are asked not to touch the vertical pipe on the seal, which is loose. The Guild does not lend its pipe wrenches. Inquiries regarding the 1,340 membership figure should be addressed to the Damp Registry in writing, on floor 611, during survey season, when the Registry is closed.