• Inverted flow sweeps contaminants away from inner eye and nasal cavity Eyewashes feature a unique inverted flow to push contaminants away from the inner corner of the eye, consistent with first aid protocols. With other eyewashes contaminants can travel through the inner corner of the eye to the nasal cavity resulting in further injury. Bowls are 11" (27.9 cm) in diameter and include a push handle to start flow. Supply connection is 1/2" IPS; waste connection is 1-1/4" IPS. Compliance: ANSI Z358.1-2009