The Rothenberger USA Canvas Drain Test Bag is designed for efficient drainage testing with a 4" diameter. Made from durable canvas material, this bag ensures reliability and longevity in various testing environments. Its robust construction allows for effective sealing and pressure retention during tests, making it ideal for plumbing and drainage applications. The bag is lightweight and easy to handle, facilitating quick setup and removal. Perfect for professionals in the plumbing industry, this test bag meets industry standards for quality and performance.