The Monument MON1377 is a 75mm Drain Testing Plug, making it ideal for smaller to medium-sized drainage pipes commonly found in domestic and light commercial installations. This compact size is perfect for standard household drain connections and waste pipe testing applications where a reliable seal is essential. Constructed from durable, quality flexible materials, this 75mm plug features removable top caps and rubber rings for easy maintenance. The simple wing nut operation allows you to quickly achieve a watertight seal by depressing the rubber cone, which expands to fill the pipe diameter securely. Features and Benefits:75mm size perfectly suited for standard domestic drainage applicationsDurable flexible construction withstands repeated use in testing scenariosWing nut knob provides easy, tool-free installation and adjustmentExpanding rubber cone creates secure watertight sealRemovable components allow for cleaning and maintenanceSuitable for pipe repair, replace