Drum Trap
A drum trap is a plumbing fixture, which is cylindrical in shape, which retains water as a seal, with an outlet at its top and an inlet at its base. Used in plumbing fixtures that are too low to the floor for installation of a P-trap.
Drain Rod
A set of drain rods is plumbing equipment used to attempt to unblock drains and sewers. The set normally consists of several stiff, but flexible, rods, each approximately one metre long, which may be screwed together end-to-end. In addition the set usually has one or two unblocking tools, which may be a flat plate or an auger, which can be screwed onto one end.
The screwed together rods and tool are inserted into a drain or sewer from an access point, sometimes referred to as a rodding point or cleanout, and used to attempt to dislodge a blockage. Rodding is the act of using a drain rod.
