The Air Control Valve is a replacement part designed for Marquis Signature Series and ATV spas from 2014 to 2017. Featuring a sleek gray handle, this valve allows you to control the air flow within your spa, ensuring optimal ventilation and efficient air mixing. By managing the air flow, it enhances the water circulation and filtration systems, contributing to a better overall spa experience. Whether you're replacing a worn-out part or upgrading your system, this air control valve ensures smooth operation and continued comfort.