Ventilation valve for sewage water pipes consists of vessel with polygonal part and thread at the top, to engage with special key, for easy valve replacement

摘要

The valve consists of a two-part conical vessel (2,3), screwed to a pipe branch socket (6), with valve seat and ventilation dome at the top, and internal float (12) with valve plate (19). The vessel also has a polygonal part (25) and a thread (28) at the top, for a special key. This has two separately turnable shafts, one of which has a polygonal part at the end, while the other one has a thread at the end. The vessel has a socket (9) at the end for connection to the branch socket. The vessel parts, the float, and the valve plate are of plastic.