Low-profile monolithic Dominator septic tanks from Snyder Industries can be buried without water for ballast and strength, and can be backfilled with native soils as long as they are trash-free and free-flowing. They are available in 750-, 1,000-, 1,250- and 1,500-gallon, and have one-piece construction with no seams that might leak or structurally fail after installation. Their manway isolation design is meant to keep manholes from distorting during backfill and pumpouts. Preinstalled tees and gaskets, and single- or double-compartment tanks are available, along with 1,200- and 1,700-gallon water cisterns. 402/467-5221; www.snydernet.com.