The low-profile 300-gallon holding tank from T.S.F. Company is 16 inches tall, designed to easily slide beneath an RV or a field office. The placement of two 3-inch holes is standard, one in the corner for clean-out and easy access from the side of the trailer and another provided for the plumbing. Varied-size holes or spin-welds can be installed anyplace in the tank for any application. It has been certified in the states that require certifications, require it by the truckload for temporary waste storage due to devastation or are required to have above-ground tanks in campgrounds. 800/843-9286;

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