How do I know if my level is accurate?

Place your level on a flat surface. Notice the location of the bubble. Flip your level over and check the bubble. It should be in the exact same place.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.