PURPOSE: A hard vinyl sump is provided to check/remove the accumulated sludge of an inlet pipe and an outlet pipe formed in a sump. CONSTITUTION: A hard vinyl sump is composed of a sump body(10), an inlet pipe(11), an outlet pipe(13), and a connection pipe(30). A prevention projection preventing the counter flow of the sewage is formed in the bottom surface of the sump body. The inlet pipe is formed in one side of the sump body. The outlet pipe is formed in the other side of the sump body. The sludge accumulated in the inlet pipe and the outlet pipe is checked through the connection pipe. The connection pipe is connected the inlet pipe and the outlet pipe. The sump body is integrally formed with the inlet pipe and the outlet pipe. A rib(40) is formed between the inlet pipe and the outlet pipe.
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