If so, you better pick up some bottled water. The Washington Suburban Sanitary Commission is putting mandatory water restrictions in place after an inspection found a 96-inch water main — the biggest of WSSC’s underground pipes — to be failing in Potomac. Repairs to fix the main are already underway. So, what does this mean for MoCo residents over the holiday weekend? Well, it means you can forget about spending the Fourth watering your lawns and gardens, washing cars or topping off swimming pools. Washing machines and dishwashers should only be used for full loads for the next four days. Finally, WSSC is also recommending the old “don’t flush your toliet after every use” tip, if you’re feeling particularly helpful.