Sioux chief 696 series OxBox drain box shall be used where necessary in plumbing systems. Box shall allow for mounting with drainage from bottom, mounted on stud through various integral features: four nail tabs are integrally molded, metal support bracket (sold separately) can be installed into top track of box and 696-BC (box clip) is available separately. Drain box shall have a 5/8 in integral test nipple on knockout. Drain connection shall be 2 in.