Creating Geometry for Bathroom Sink: Faucet, Handles, and Drain

Adding Faucet, Handles, and Drain Geometry to the Bathroom Sink Drawing

Discover the intricacies of completing a bathroom sink drawing with symbolic and representative features including faucet, handles, and drain. The step-by-step guide covers from drawing geometric shapes, to copying them into the right locations, and adding the finishing details.

Key Insights

  • The drawing begins with creating geometric shapes to represent elements of the sink such as the faucet, handles, and the drain. The dimensions are not exact but symbolic, for example, two-inch circles represent the faucet and handles.
  • Tracking and copying techniques are employed to accurately represent the locations and distances of various sink elements. The handles, for instance, are shown to be 2.5 inches apart from each other.
  • The final stage of the drawing involves cleaning up the geometry and adding the final touches like fillets. The outer rectangle has a three-inch diameter fillet while the inner one has a one and one-half inch diameter fillet.

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In this video, we will finish the bathroom sink. Before we create the fillets for either the inner or the outer rectangle, I would like to create the other geometry for the drawing.

That includes the faucet and handles and the two-inch sink drain. Now, because this is a symbolic and representative drawing, we do not know the exact dimensions of the faucet and handles, so we will represent it with two-inch circles, and the faucet will also have a two-inch radius on the bottom. So, to start, we can draw one simple two-inch circle and copy it into the other locations of the drawing.

So let's get started. We can see that the faucet begins here and that the faucet and handles are a total of two and a half inches from the bottom of our sink. So, the first thing I need to do is to draw a circle using tracking two and one-half inches from the base midpoint here.

Let's go circle, T-R-A, enter, and our first tracking point will be this midpoint. I will track up a distance of 2.5, enter, and we have a two-inch diameter, so I will hit ENTER to say that I'm done tracking, D, enter, two, enter. That will be the base of our faucet, and now we can copy our two handle circles and the circle for the drain up here.

These will be three distance and direction copies, so we can use any base point. However, for this example, I'd like to show it using the base point at the center of this circle. So, let's go copy, choosing my circle, enter to lock it in.

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I will go to shift, right-click center of this circle, and with ortho on, I will show to the left a distance of 2.5. Now, how did I get 2.5? We can see that the handles are five inches apart from each other, and that means that each circle here is 2.5 inches from the center. So, 2.5, showing to the left, enter, and now I will show to the right, 2.5, enter. Finally, I can show up a distance of 7, enter, and then enter to say that I am done.

So, by using one circle, we've created multiple pieces of geometry for this drawing. To finish the faucet, we can see that the total length from the center of the circle is 4.5 inches. In order to draw this shape, we can start with some construction geometry.

So, let's go to line. Let's start at the shift, right-click center of the circle, and I'll choose the center here, and then again with ortho on, I will go up a distance of 4.5, enter, and enter to say that I am done. We can see a dimension running all the way up the center of the sink, saying one inch.

That dimension is actually the width of the top of the faucet. So, to get an endpoint here and an endpoint here, I could draw the horizontal line to begin with, but I would rather use the geometry we have, which is construction geometry. So, I will instead offset a distance of 0.5, enter, from here to the left and click, and here to the right and click, enter to say that I am done.

All three of these vertical lines are construction geometry, but it's a fast way to find the points we need. Now, to draw the diagonal line that starts here and then goes to this point, we want to use the tangent object snap. The tangent snap will allow us to click on the circle, and then AutoCAD will automatically figure out the angle of the line in order for that line to be tangent somewhere around here.

So, let's go to line, shift-right-click tangent, and I will choose the circle roughly in the position that I think the tangent area will be. And as I move the mouse, we can see that the line is moving with the circle. I can go up to the endpoint, across to this endpoint, and then again, shift-right-click tangent, and choose the other part of the circle.

This time, because it knew the endpoint at the top of the circle, it automatically shows me where the tangent point will be. When I click and hit ENTER, we can see that the lines are drawn tangent here and tangent here. To finish this geometry, we need to clean it up by first erasing our three vertical lines.

So, I can zoom way in with a small crossing window from here to here. I can pick the lines and hit the delete key, and then I'll zoom back out. And we can use trim to clean up not only the rectangle, but also the circle.

I will go to trim, and I can simply pick this line to get rid of I do not want, and the top of the circle. Enter to say that I'm done. Finally, we can add our fillets, which are both going to be polyline fillets.

The outer rectangle has a three-inch diameter fillet, and the inner rectangle has a one and one-half inch diameter fillet. I will go fillet, R for radius, and let's do the outer diameter fillet first, which is three, enter. I'm going to use P for polyline, enter, and I will choose my outer rectangle.

Enter to go back in. Do not use three inches for the inner rectangle, however. Go back to R for radius, 1.5, enter, and again I can do P for polyline, enter, and choose my inner polyline, click.

I can now zoom extents and control S to save. In the next video, we will begin working on the kitchen sink.

photo of David Sellers

David Sellers

David has a Bachelor of Architecture Degree from Penn State University and a MBA from Point Loma Nazarene University. He has been teaching Autodesk programs for over 10 years and enjoys working and teaching in the architectural industry. In addition to working with the Autodesk suite, he has significant experience in 3D modeling, the Adobe Creative Suite, Bluebeam Revu, and SketchUp. David enjoys spending his free time with his wife, biking, hanging out with his kids, and listening to audiobooks by the fire.

  • Licensed Architect
  • Autodesk Certified Instructor (ACI SILVER– Certified > 5 Years)
  • Autodesk Certified Professional: AutoCAD, Revit, Fusion 360
  • Adobe Visual Design Specialist
  • SketchUp Certified 3D Warehouse Content Developer
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