in the tire area so that the internal bore 104 is in fluid communication with an inlet end 42 of the pump passageway 43 a valve body 110 has an outer threaded surface 112 that is received within insert 102 the valve body 110 has a central passage 115 that has a first opening 118 that is in fluid communication with the insert sleeve bore 104 and the pump passageway 43 inlet end 42 when inserted into the tire the central passage 115 has two opposed holes 120 near the head 122 of the valve body 110 the head 122 has a hex head bore 124 or any screwdriver slot shape for receiving an allen wrench useful for tightening the valve body 110 inside the sleeve 102 the central passage 115 further includes a retainer slot 130 for receiving flexible stopper 140 the flexible stopper 140 is preferably made of a resilient material such as rubber silicone or an elastomer the flexible stopper 140 has a disk shaped lower end 142 and two opposed legs 144 which extend from the lower end 142 each leg 144 has a shoe 150 which has a curved enlarged shape and is made of a resilient material as shown the shoe is a semi circle although other shapes would work for the invention although the flexible stopper 140 is shown with two legs 144 the stopper could have a single leg 144 with a shoe thereon and the shoe.