The Berkey Sight Glass Spigot for Crown Berkey System 13 is the perfect accessory for your Berkey water filter system. With its high-quality construction and durable design, this sight glass spigot allows you to easily view the current water level in your Berkey water filter. It is specifically designed to replace the original spigot on Berkey water filters and is built to commercial grade standards for long-lasting use. Measuring at 13 inches in size, this Berkey Sight Glass Spigot is the perfect upgrade to your Berkey water filtration system.