Anti-cyclone fittings are designed to help prevent air from entering a custom water loop in the event that pump flow causes a vortex in a reservoir large enough to draw air from the top of the reservoir to the pump inlet. By disrupting the flow of water at the exit point of the reservoir, anti-cyclone fittings prevent the bottom of a vortex from reaching the outlet port of your reservoir and therefore allowing air to escape into the loop. Simple in design and ingenious in its application, these fittings simply screw into the inside of the outlet port in your reservoir. TITAN RIG carries anti-cyclone fittings in different sizes and colors from multiple brands. Pick one up for your reservoir today.