Short Description:

Installed at the tail end of the drainage pipe, the flap valve has the function of preventing backfilling of external water. The clapping door is mainly composed of four parts: seat, valve plate, water seal ring and hinge. Shapes are divided into circles and squares. . Drainage measures: Drainage from the original chimney drainage wells, no additional drainage devices Material of main parts Body               stainless steel Board                stainless steel ...