Vent valve price 7 out of 5 stars 7 Price, product page ₹3,988. D. Watts. 71 M. 94 Automatic air vent valve for clean water (not sewage or waste water) and other neutral liquids to max. Plumbing and drainage supplies. They are commonly used to eliminate air pockets in steam mains and risers. For technical drawings and 3-D models, click on a part number. P: ₹6,381. Working Pressure. hdhzkovdiolxfjenseqryydoxbyyuzaguidytczgeadjoakcf