The Weil-McLain 640-000-007 Gasket Set Kit is a genuine replacement sealing kit designed for compatible Weil-McLain boilers and hydronic heating systems. It includes precision-engineered gaskets that create secure, leak-resistant seals between critical boiler components, helping maintain proper pressure and efficient operation. By preventing the escape of water, gas, or combustion byp... https://www.partshnc.com/640-000-007-weil-mclain-gasket-set-kit