The 1.5" MPT Black Plug with O-Ring is a reliable and durable pool accessory designed to seal wall inlets and outlets during the off-season, helping to protect your pool from freezing damage. Made from high-quality black plastic, this plug comes with a built-in O-ring gasket that ensures a tight seal to prevent leaks. The male pipe thread (MPT) connection makes installation quick and easy, requiring no extra tools. Perfect for both above-ground and in-ground pools, this plug helps maintain the integrity of your pool’s plumbing during winterization.