🔍 Key Concepts

• Basic pipe fittings and how they connect two sections of pipe • Difference between inside threads (female) and outside threads (male) • Which fitting is normally used to join two pieces of the same size pipe in a straight line

💭 Think About

• Ask yourself: When you want to connect two straight pipe ends together in line, what fitting do you usually use? • Think about whether the fitting needs male (outside) or female (inside) threads to receive the threaded pipe ends. • Look at each choice and picture how many pipes you could screw into that fitting and from which direction.

✅ Before You Answer

• Verify which option would allow two threaded pipe ends to screw into the same fitting from opposite sides. • Check whether a standard coupling is meant to join or adapt (change size/type) or simply connect like-to-like in a straight line. • Make sure the thread description (inside vs outside) matches how a pipe end normally connects into a fitting.