Sioux Chief Mechanical Drain Test Plug is designed for reliable and efficient head tests, featuring a polypro wingnut, nylon top plate, soft PVC gasket, and nylon base/stem that combine simplicity with strength. This test plug provides a leak- seal capable of withstanding over eight times the PSI of other mechanical test plugs. Its innovative back-to-front wedge design prevents blowouts under both high and low temperature conditions, ensuring safety and durability. The nonslip shoulder allows for fast and easy installation, making it a practical choice for professionals. Available in multiple sizes—1-1/2", 2", 3", and 4"—each plug includes a nylon flange and a soft PVC gasket for optimal performance. Model Number: