Leopold Universal Type S® Underdrain by Xylem
Leopold Type S technology underdrain is designed to provide uniform distribution of wash water and air to clean every corner of the filter without media upset.
The underdrain evacuates filtered water from the filter during the filter run and introduces water and air during backwashing and air scour. Leopold employs an underdrain system featuring advanced Leopold® Type S® technology. Leopold Type S technology underdrain is designed to provide uniform distribution of wash water and air to clean every corner of the filter without media upset.
Leopold® Universal® Type S® and Type SL® underdrain deliver a broader airflow range — from 1 to 5 scfm/ft. Air stability is improved with all orifices providing uniform and continuous airflow. Water maldistribution is lower — less than /-3 percent.
Type S underdrain is ideal for designs requiring longer laterals. Type SL underdrain features a lower profile, making it ideal for shallow filters where greater filter media depth is desired. Both feature the dual parallel lateral design pioneered by Leopold, ensuring uniform distribution of water and air at each dispersion orifice opening even in extra long lengths. Both feature a unique water recovery channel for superior air scouring and water backwash performance. Both are constructed of high-density polyethylene (HDPE) construction for strength and corrosion resistance.
In addition, both can be factory-fitted with the IMS® (Integral Media Support) Cap, a porous plate constructed of HDPE (high density polyethylene) beads sintered together. The IMS Cap eliminates the need for gravel thereby allowing for deeper media depth.