What is three day capacity? Aug 31, 2014 20:21:01 GMT -4 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by domg on Aug 31, 2014 20:21:01 GMT -4 The CCNS requires self-contained buggies to have a three day capacity. How many gallons of capacity is that? In gray n black water, how many gallons each?