Abstract: A compression plug system for plumbing, comprising a plumbing pipe, a slip nut, a seal ring, and a plug. The plug comprises a head having a closed end, and an external threaded portion having an edge. Extending from the head is the external threaded portion that extends to the edge. The external threaded portion has a cooperative dimension to engage with an internal threaded portion of the slip nut. The plug also has an internal wall that extends from the edge until an internal end. The plug further comprises an opening defining a cavity therein that reaches the internal end. The internal wall has substantially a same diameter as the internal wall of the seal ring. The compression plug system for plumbing creates an impermeable seal without the aid of a sealing compound or weld.