The amount of water wasted by pigs from drinking utensils is difficult to measure directly. Bekaert et al.,(1970) claim that directly activated bite drinkers spill 66% of the water they dispense. However Olsson, (1983) estimated that water spillage accounts for 20% of the total volume of water used by pigs. If it were possible to determine indirectly the water intake of pigs, this value subtracted from the gross consumption value (metered) would give the amount of wastage. The aim of this experiment was to evaluate the use of urine relative density and creatinine concentration as indirect determinants of water intake.