If lines cross but do not connect in a basic hydraulic schematic, how is it shown?

• A. A dot at the intersection
• B. One line is drawn with a U over the other line
• C. They connect with a cross
• D. The lines are simply overlapped

Answer: (B)

In schematic drawings, when two lines cross but don’t connect, one line is shown with a small U-shaped jump over the other. This little hump signals that the lines merely cross and do not join, keeping the flow paths separate and avoiding any mistaken tap or junction.

This works because a dot at the intersection would imply a connection, while simply letting the lines cross without any marker can be ambiguous. The U-over-curve is a clear, quick visual cue that the crossing is non-connecting, which is important for accurately tracing hydraulic routes during maintenance or troubleshooting.