To inflate a Presta valve, you simply unscrew the valve stem anti-clockwise after which connect a pump. After the specified air strain has been achieved, get rid of the pump and screw the valve stem clockwise to ensure it is actually airtight. Knowband has the working experience in creating Prestashop https://kingslists.com/story21009274/the-single-best-strategy-to-use-for-presta-addons