Experiments were done to evaluate the effect of wet/dry feeder on the total manure volume produced by pigs. The results showed that for dry feeder and drinkers, the manure produce equals 7.34 L/pig per day and when the pigs are fed using dry/wet feeders, the volume of manure produced is 2,97 L/pig per day. When considering cleaning and extra water needed for manure removal when the wet/dry feeders are used, this lead to total manure volumes of 8,07 L/pig per day for dry feeder and drinker compared to 4,14 L/pig per day for wet/dry feeders. The reduction equals 48% and the results agree with the literature. This conclusion could lead to a change in the standard for the evaluation of the volume required for swine manure storage.

Means to reduce water wastage have to be considered as the excess manure produced has to be stored and subsequently spread. The extra water coming from spillage contribute only in more dilution of the nutrients in the manure.