3 Simple Ways to
Share What You Make

With Instructables you can share what you make with the world — and tap into an ever-growing community of creative experts.

PhotosPhotos

Share one or more photos of a project, recipe, or whatever you've made, quickly and easily.

Learn more & Get Tips

Step by StepStep-By-Step

Share your step-by-step photos with text instructions of what you made so others can do it too!

Learn more & Get Tips

VideoVideo

Share your how-to video. You'll need your embed code from a video site such as YouTube.

Learn more & Get Tips

Improvised Gas Mask

Step 16Exhale Valve

Exhale Valve

This snorkel has an exhale valve so air doesn't have to get forced back out the filter. The air flow is one direction, which means there's no dead air going back and forth in the tube for CO2 to build up in. Because of this exhale valve, I could use a longer more flexible tube. That would probably make it more comfortable to wear.

« Previous Step

Download PDFView All Steps

1250
Followers

Author:TimAnderson

Tim Anderson is the author of the "Heirloom Technology" column in Make Magazine. He is co-founder of www.zcorp.com, manufacturers of "3D Printer" output devices. His detailed drawings of traditional ...