Upgrade your fermenter with this 4" Cap with S30 Valve. The valve allows you to easily transfer your beer or wine to a keg or bottle without the need for siphoning. The 4" cap provides ample space for adding ingredients and makes it easy to clean and sanitize. The cap is made from high-quality materials and is designed to withstand the rigors of homebrewing. Upgrade your homebrewing setup with this 4" Cap with S30 Valve.