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Module 7: Plumbing Drawings

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Types of Drawings
Plumbers work with many different types of drawings. The ability to read and create simple sketches as well as complex isometric drawings is, therefore, vital.

Even though each type of drawing may use a different technique to convey information, drawings have many similarities.

The next slide presents some of the common types of drawings that are used in the trade.

Click on each type of construction drawing to know more:
Sketches
Plumbers often make sketches on any convenient surface: a scrap of paper, wood, floor, or wall. These simple sketches can communicate very effectively.

Sketches, like all construction drawings, should include a title block.

Pictorial Drawings
Pictorial drawings show a three-dimensional view of an object. Much like a photograph, pictorial drawings present a picture of an object that is very similar to the actual object.

Plumbers use two types of pictorials drawings: isometric and oblique.

Isometric drawings
In these drawings, all vertical lines are shown vertically but all horizontal lines are projected at 30-degree angles and appear to go back into horizon.

Isometric drawings create an illusion of three dimensions.
Oblique Drawings
These drawings create the illusion of depth by using lines that are drawn at 45 or 60 degrees to the horizontal. The corners are not drawn at 90-degree angles even though the object itself has 90-degree corners.


Schematic Drawings
Most plumbing drawings are schematic drawings. These drawings are also called single line drawings.

Orthographic Drawings
To communicate information about the exact size and shape of an object, designers often use orthographic drawings, which show dimensions that are proportional to the actual dimension of the object.

Most plumbing drawings include riser diagrams, floor plans, isometric views, and details.

Plumbers have to work with many different types of drawings. For this purpose, they must be able to find the size and dimensions of fittings from manufacturers’ catalogs, and must also be able to interpret details about assemblies.

The next slide presents the basic drawings that are used by plumbers.

Click on each type of drawing used by plumbers to find out more about it:
Approved Submittal Data
Plumbers use submittal data, also called catalog drawings, to determine factors such as the overall dimension, actual inside dimension, fitting depth, and laying length of the fittings.

When the architect or engineer approves the fixtures or fittings in catalog drawings, it becomes approved submittal data.

Exploded Drawings
Exploded drawings, also called assembly drawings, illustrate how to assemble complex objects. They show the relationship of the individual parts to the whole object.

Fixture drawings
Plumbers often use fixture drawings to determine whether a certain fixture will fit in the available space.

Cutaway Drawings
A cutaway drawing provides enough details to show how the product is constructed. Each part in a drawing is numbered, and this number corresponds to the parts' list.