Should constipated people drink 4,6,8, or 10 litres of water per day?

Fluid intake: "The Institute of Medicine sets general guidelines for total water intake. It recommends that women consume a total of 91 ounces (that’s about 2.7 liters) per day – from all food and beverages combined. For men, it’s about 125 ounces a day (or 3.7 liters). Depending on your diet, about 25% of the water you consume comes from your food. " REF: http://www.doctoroz.com/blog/leigh-vinocur-md-facep/ho