3-inch (about 7.6 cm) sewer water pipe plug: Includes 1 piece of pre-assembled 3-inch sewer cleaning cover for daily use. The threaded pipe water stopper helps prevent pipe damage and protects sinks and plumbing. Stable performance: Made of high-quality rubber and metal with maximum expandability for a tight seal. Features a stainless steel wing nut for enhanced reliability, stability, and strength compared to plastic alternatives. Designed for long-term use. Easy to use: This threaded rubber plug prevents water from entering the pipe. Simply screw it into return and drain inlets after cleaning—no wrench required. Compact size ensures easy handling and operation. Wide usage: Suitable for winterizing pipes to prevent freezing. Also used for pressure testing swimming pools during equipment maintenance and preventing water outflow. Practical application: Functions as a mechanical test plug for various plumbing applications. Compatible with standard pipes. Ideal for outdoor swimming pools, kitchen sinks, bathroom sinks, and small indoor pools. Includes: 1 x Sewer Water Pipe Plug