This optional Manual Vacuum Pump is for use with the Shayz In-Pool Lounger. It can be connected to the port on the head of the vacuum valve. This allows you to use a pump to pull air from the core of Shayz and vacuum more water into the product core. To fill Shayz entirely with the pump takes around 200 pumps, equaling about 2-3 minutes of fast pumping. Note that when filling exclusively using the hand pump there will be a small amount of air that will be trapped at the top of the knee rest area within the product core and this could lead to a slight floatation of the front of Shayz.