"The accused will be bound at the wrists with ropes and attached to two iron rings encased in the wall . These should have a distance of  6 inches from each other and should be 3 feet above the level of the ground . Two other iron rings fixed on the floor at a minimum distance of 12 feet from the wall should be available. Through these rings the ropes which retain the prisoner's feet will be drawn . The ropes should be fastened by humane strenght  one after the other so that the prisoner is bound in the most severe manner possible . He is then admonested again to tell the truth . To sustain the prisoner a bench 2 feet high may be placed underneath the middle of his body . A large recipient should be placed underneath the delinquent to receive the liquids he eliminates ..."

Thus bound the victim was forced to swallow 4 liters of water if it was an "ordinary questioning".
If it had to be an "extraordinary questioning " the water volume was 8 to 9 liters !