The Zoeller Pump Square Head Plug is crafted from high-quality black iron, designed for 3" NPT connections. This robust plug is ideal for sealing pipe ends in various plumbing and pumping applications, ensuring a leak-proof fit. Its durable construction provides excellent resistance to corrosion and wear, making it suitable for both indoor and outdoor use. The square head design allows for easy installation and removal with standard tools, ensuring convenience during maintenance. This plug meets industry standards for safety and reliability, making it a trusted choice for professionals.