The Monument Dry Testing Drain Plug in 37mm x 45mm size is perfect for blocking off small to medium pipes during repair or testing work. This compact size makes it particularly suitable for blocking off small pipes such as copper for dry testing prior to commissioning. This plug features a flexible rubber cone that expands when the wing nut knob is turned, creating a reliable watertight seal. Simply place the plug in the pipe end and turn the knob to depress the rubber conethe expansion securely seals the pipe or tube end. Fitted with removable top caps and rubber rings, this plug delivers dependable performance for professional tradespeople. Features and Benefits:37mm x 45mm size ideal for small pipes including copperWing nut knob operation for easy installationExpanding rubber cone creates watertight sealRemovable top caps and rubber rings includedSuitable for dry testing applicationsCannot be used for air testing purposes by itself Specifications: Tool Type: Drai