Assmann’s Full Drain Outlet assembly, patent pending, for 2,500 gal tanks and larger, drains tanks without mechanically installed nozzles and can be utilized where heavy solids or salts may accumulate in the bottom. The linear polyethylene tanks are certified by NSF to NSF/ANSI Standard 61, while high-density crosslink resin tanks have NSF 61 Certification. The company's management system is ISO 9001:2008 certified.