Our airline reducers are used to connect two dissimilar sized airlines. The main airline out to all props should be 3/8 or 1/2 and then reduced to 1/4 at most of the prop locations.
Plug-In Reducers
One end has a shaft that pushes into another push-on fitting, the other has a push-on connector for tubing.
Reducer Unions
Both sides have push-on connectors for tubing. Use these to splice same sized tubing together or to join two different sized tubing.