Distribution lines in a sand filter should be spaced at what distance?

The recommended spacing for distribution lines in a sand filter is indeed 3 feet apart. This spacing is critical for ensuring even distribution of effluent across the surface of the sand filter media. Adequate spacing allows for proper infiltration and treatment of wastewater, which is essential for maintaining the effectiveness and longevity of the sand filter system. By having the lines spaced appropriately, the effluent can spread out evenly, thus preventing pooling or uneven saturation that could lead to system failure or reduced treatment efficiency. Properly spaced distribution lines also help in minimizing the risk of clogging and promote optimal performance of the sand filter.