Create a rectangle from two four-foot sections and two eighteen-inch sections. Connect each section with a three-way corner connector. The third (empty) opening of each connector should face upward.
Insert a six-inch piece of pipe into each empty opening. Place a four-way connector on each six-inch pipe. Create an identical rectangle using these four-way connectors as corner pieces.
Insert a 12-inch piece of pipe into the top, empty opening of each four-way connector. Place another four-way connector on top of each 12-inch pipe segment.
Create the bench seat by connecting the appropriate sides with an 18-inch segment. Alternate 12-inch segments of pipe with T connectors to create the remaining four foot sides. Place 18-inch segments of pipe between the opposing T connectors. This will reinforce the bench seat.
Angle the bench so that a long (four-foot) side faces you.
Create arm and back rests by inserting a nine-inch pipe into the top segment of each four-piece connector in the corners. Place an elbow connector over the front two pipe sections. Place a three-way corner connector on the back two sections. Connect the front and back sections with 18-inch segments of pipe. Connect the back two corners together with a four-foot section.
Set a piece of plywood over the bench seat. Add a cushion for comfort.
Place a piece of plywood over the second rectangle for a storage bench. Create storage cubby holes by gluing 18-inch segments of pipe underneath the board. Place a piece of cardboard backing on each pipe before gluing it in place. These tubes can be used to store tools, gardening equipment, or other small objects.