Label Fittings

Drawing > Label Fittings... writes manufactured-fitting-style Civil 3D part Descriptions — 24" X 18" 45° WYE, 18" 90° BEND, 24" X 18" PIPE SIZE CHANGE — onto the wyes, bends, and pipe-size changes HydraStorm finds in your network, from templates you control. It's suggest-and-confirm, the same shape as Rename Parts by Run: nothing reaches the drawing until you check a row and click Apply to C3D.

What Counts as a Fitting

A structure is eligible to be classified — and therefore labelled — when it's a null structure, a healed auto-joint, or a real Civil 3D part whose description or name matches a Fitting Keyword (Project Settings > Storm Drain > Fitting Keywords) as a whole word. A manhole is never eligible on its own: receiving a lateral doesn't make it a wye, and nothing here ever touches it.

Among eligible structures, HydraStorm classifies by pipe degree, plan geometry, and conduit size:

• Wye — two pipes in, one out. The inlet whose plan angle to the outlet is nearest straight-through is the trunk; the other is the lateral. Ties are broken first by which inlet shares the outlet's reference alignment, then by the higher flow (when flows are known), then by pipe id — whichever tie-break decided it is named in the row's Note.
• Bend — one pipe in, one out, deflected 10° or more.
• Pipe size change — one pipe in, one out, straight, but the inlet and outlet conduits differ in shape or dimensions.
• Not a fitting — a straight splice with identical conduit on both sides, or an eligible structure with three or more inlets. The latter is reported in Network Issues rather than treated as a wye: a manufactured fitting has exactly one lateral.

Auto-joints are eligible for classification (so they still participate in the Lateral Match at Wyes grading rule) but never appear as a row in this dialog — there's no drawing part to write a description onto, and the joint itself is re-detected from scratch on every network re-read.

Templates and Tokens

Six templates — one per fitting kind, times pipe vs. box — compose the description text. Which pair applies is decided by the outlet's conduit shape (falling back to the trunk, then any connected pipe, if the outlet can't be read):

Kind	Pipe (circular/elliptical/arch)	Box (RCB)
Wye	{MAX} X {MIN} {ANGLE}%%d WYE	{MAX} X {MIN} {ANGLE}%%d WYE
Size change	{MAX} X {MIN} PIPE SIZE CHANGE	{MAX} X {MIN} RCB SIZE CHANGE
Bend	{SIZE} {ANGLE}%%d BEND	{SIZE} {ANGLE}%%d BEND

These six are the defaults; edit them from the Templates button in the dialog. %%d is AutoCAD's degree control code — it's what the drawing text actually needs to display a ° symbol. You can type ° in a template instead and HydraStorm converts it for you.

Tokens

Token	Renders as
{MAX}	Largest connected pipe/box size at this fitting.
{MIN}	Smallest connected pipe/box size at this fitting.
{SIZE}	The outlet size (the single barrel size at a bend).
{ANGLE}	Deflection from straight, in degrees — the same convention as the Angle / Lateral Angle columns in the Structures dialog (0 = straight, 45 = a 45° bend).
{IN}	The inlet size (the trunk's size at a wye).
{OUT}	The outlet size.
{TRUNK}	The wye's trunk inlet size.
{LATERAL}	The wye's lateral inlet size.

Size Formatting

Each connected pipe renders in its own plan-set convention, whichever family's template is chosen: a circular pipe prints inches with the inch mark (24"), a box prints feet with the foot mark as W X H (6'X4'). This means a box trunk with a pipe lateral on a Pipe-family wye (chosen by the outlet's shape) reads something like 6'X4' X 24" 45%%d WYE — each size in its own units, not converted to match the other. Elliptical and arch conduit (unsupported for hydraulic sizing, but still connected pipe) print as W"XH" in inches, with a warning noting the shape so you know to check it.

Where the Angle Comes From

HydraStorm resolves {ANGLE} in this order:

1. The structure's assigned Angle (bend) or Lateral Angle (wye) from the Structures dialog — a confirmed value.
2. Plan geometry snapped to a manufactured class (22.5°, 30°, 45°, 60°, 90°) within 5° tolerance.
3. The measured plan-geometry angle, when nothing snaps — rounded to the whole degree, with a warning on the row asking you to confirm it in the Structures dialog.
4. Unresolved — no plan geometry and no assignment. A template that reads {ANGLE} can't compose for that row until one is provided; it's also flagged in Network Issues as a wye with no resolvable lateral angle.

The Dialog

Each row is one structure: Structure name, Alignment, Kind (Wye / Size change / Bend), the Current Description as read from the drawing, an editable Proposed Description, a Status, and a Note carrying any warnings (an unresolved angle, a size change on a bend or wye trunk, a tie-break explanation, and so on). Select all / Select none toggle every row's checkbox at once; you can also check or uncheck rows individually, and edit the Proposed Description text directly — editing a cell checks that row and marks it as your own text going forward, so future regenerations (for example, from the Templates dialog) leave your edit alone.

Status

Status	Meaning	Checked by default?
New	HydraStorm has never authored a description here.	Yes, unless the template already happens to compose the drawing's current text.
Current	HydraStorm authored this description and it still matches what the templates compose today — nothing to update.	No (nothing to do).
Outdated	HydraStorm authored this description, but the sizes, the resolved angle, or a template changed since — the text on the drawing no longer matches what would compose now.	Yes.
Released	HydraStorm authored this description once, but the drawing's text no longer matches it — someone (or something) edited the Description directly in Civil 3D. See Hand Edits Release the Label.	No, with a note explaining why.
Orphaned	HydraStorm authored this description, but the structure no longer classifies as a wye, bend, or size change (a pipe was added, removed, or the geometry straightened out).	No, with a note; the drawing's text stands.

Templates…

Opens the template editor: a six-row grid (one per Kind × pipe/box family) with an editable Template column and a read-only Example column that renders the template live against sample sizes, so you can see what it produces before it touches a single structure. A token legend across the bottom lists what each token means. Reset to defaults restores all six templates to the built-in set shown under Templates and Tokens above.

Closing the Templates dialog with OK re-composes every row in the main grid that you haven't hand-edited, so you can see the effect of a template change across the whole network before committing to it. The template set itself is saved with the project (not applied to the drawing) when you click OK on the Label Fittings dialog — canceling the outer dialog discards template edits too.

Applying to Civil 3D

Clicking OK with one or more rows checked writes each accepted row's Proposed Description onto the working model as an undoable edit (Ctrl+Z reverts it like any other property change), and records what HydraStorm authored so it can recognize the label again later. Nothing reaches the drawing until you click Apply to C3D — see Applying Changes for the general Apply flow. Once applied, any Civil 3D label style you already have printing a structure's Description picks up the new text automatically; HydraStorm doesn't create or manage the label itself, only the text it displays — see Profiles & Labels.

OK is blocked (with the specific problems listed) when a checked row's Proposed Description is empty, or when a template itself is broken — an unknown token, or an empty template for a kind that's in use.

Two Things Worth Knowing

• A size change at a bend or a wye's trunk still gets labelled. Manufactured bends and wyes are cast for one barrel size, so a size change belonging there is a drafting fault — but the fitting still gets its bend/wye label, composed with the sizes as actually drawn, plus a warning on the row (and a matching Network Issues row) telling you to move the size change to a straight joint instead of silently refusing to label it.
• Null structures stay null structures. Labelling one doesn't change what Civil 3D thinks the part is — HydraStorm reads Civil 3D's own part type, and writing a Description is just text on the structure, exactly like it is on a manufactured fitting part.

Tracking and Staying Current

HydraStorm remembers what it wrote at each structure, separately from the text the template composed at the time — so a description you hand-tweak in the dialog doesn't perpetually read as outdated, while the fitting's real inputs (sizes, resolved angle, the template itself) are still watched. When one of those inputs moves out from under an authored description, Network Issues shows a Fitting label outdated row for that structure with an Update Fitting Labels… button that reopens this dialog pre-filtered to only the outdated rows.

Hand Edits Release the Label

If a structure's Description is edited directly in Civil 3D, HydraStorm doesn't fight it or overwrite it back. HydraStorm's own copy of that text doesn't change until the next Refresh from Civil 3D; once it re-reads the drawing, the row is marked Released — the drawing's text is what's kept, HydraStorm stops treating it as a description it manages, and the refresh review lists the change as informational (nothing to accept or reject — it already happened). From there, Label Fittings can re-adopt it: the row shows up Released, unchecked by default with a note explaining why, and checking it re-authors the description from the current template.

Drafted Outputs

Any drafted CAD table that prints a structure's part description will show as out-of-date once you relabel it — check Output > Drafted Outputs... after a labelling pass the same way you would after any other geometry change.

Related Network Issues Rows

Several rows in Drawing > Network Issues... come from the same fitting classification Label Fittings uses, whether or not you've ever run Label Fittings on the project:

Row	Meaning
Fitting with 3+ inlets	An eligible structure (null structure, auto-joint, or fitting-keyword part) has three or more pipes entering it. A manufactured wye has exactly one lateral, so this isn't classified as a wye at all — Auto Design and the Lateral Match at Wyes rule treat it as an ordinary structure, and it isn't offered a label.
Size change at a bend/wye	Conduit size changes across a bend, or across a wye's trunk-through. See above.
Wye angle unresolved	A wye's lateral angle couldn't be resolved from plan geometry and none is assigned in the Structures dialog — both the junction-loss angle and the fitting label need one.
Pipe shrinks downstream	A classified size change has an outlet smaller than its inlet — pipe size should never decrease going downstream; Auto Design's no-shrink sweep will upsize it.
Fitting label outdated	See Tracking and Staying Current above.