1374n drain test plug 38mm 1.1 2in monument 1374n, monument drain testing plugs are durable, quality flexible drain plug for the plugging of drains and pipes'. '.strtoupper('t')his plug is easy to use and are available in various sizes'. '.strtoupper('f')itted with removable top caps and rubber rings'. '.strtoupper('t')hese 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'. '.strtoupper('i')t cannot be used for air testing purposes by itself'. '.strtoupper('d')iameter range 37 45mm'. '.strtoupper('m')aximum allowable back pressure 60psi 4bar'. '.strtoupper('m')onument 1374n drain test plug 38mm 1.1 2in