Pipefitting 90Deg Intersection is a free Android app developed by Waters Mechanical. It falls under the Utilities & Tools category and is designed to help pipefitters with the tedious task of calculating 90-degree pipe intersections. The app is specifically tailored to Standard Weight pipe sizes ranging from ½” to 24”.

Using the app is simple: just enter the branch line in the first box and the main line in the second box, and press calculate. The app then provides the ordinates for 16 points to lay out a 90-degree intersection. It is worth noting that the app assumes that the user is a journeyman pipefitter (steamfitter) and knows how to lay out the pipe when the calculated ordinates are given. For those who need more information, Waters Mechanical's webpage provides additional details. Additionally, the developer is set to release an upcoming version of the app that allows for more pipe sizes and varying lateral degrees.