Jones Stephens has built its reputation over the years as a leader in the plumbing industry, providing the market with thousands of products to complete any project. This plug is for use with service weight (caulk into hub) or no-hub ( use coupling). Designed for 4 in. pipe. ! WARNING: This product can expose you to chemicals including lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm.