Valterra's ABS Fresh Water Tanks are constructed of high grade, lightweight, completely algae-free black ABS plastic. They are tasteless, odorless and non toxic and will never rust or corrode. Their one-piece extruded construction eliminates the possibility of leakage with baffles every 18" for surge control. Easily installed, universally designed with six 3/8" threaded fittings (three on each end). For low pressure applications only.