Monument Drain Testing Plugs are durable, quality flexible drain plug for the plugging of drains and pipes. This plug is easy to use and are available in various sizes. Fitted with removable top caps and rubber rings. These plugs are easy to use just place in the pipe end that is being repaired or replaced and simply turn the wing nut knob, this will depress the rubber cone, this will make it expand to seal pipe or tube end with a water tight seal.Monument Drain Test Plug is suitable for blocking off small pipes such as copper for dry testing prior to commissioning. It cannot be used for air testing purposes by itself. Diameter range: 37-45mm. Maximum allowable back pressure: 60psi (4bar).Additional Information:Tool Type: Drain Test Plug