Distribution System Specifications: Elevated Sand Mound

Distribution System Specifications: Elevated Sand Mound. The distribution system in an elevated sand mound shall consist of three components: a. A pressurized distribution manifold, which shall consist of a small diameter (1”–1.5”) Schedule 40 pipe to receive the effluent from the pump. This pipe shall be connected so as not to create any dead ends, and shall have 3/8” holes drilled in it every 36” pointing up. [See Figures 17 and 18.] The effluent from the pump must come to the center of this distribution manifold and absorption area. b. A field drain pipe to house the pressurized distribution manifold – A 4” field line pipe with the holes pointing down is acceptable. Other field drain pipe designs may be acceptable, but must first go through the experimental protocol. c. Distribution media – ½” to 2.5” gravel to a depth of 1’ is acceptable. The design of the absorption area must comply with design guidelines for gravel underground absorption. If other distribution media is approved, they must comply with the appropriate regulations and guidelines.