Cook Mfg - MAX-AIR Venturi With Face Plate and 6' Tubing - MAV2KTDPWith face plate and 6' tubing Draws fresh air from outside the livewell and injects tiny air bubbles into the water flowing into the livewell. Aerated water enters the well at a lower level than with traditional spray heads. The reduced restriction of this fitting allows more water to flow from the pump, works well on fresh water intake or recirculation systems. Faceplate can be mounted anywhere above the water line.