Item Condition Opened box - original retail box shows some wear. In excellent condition. Opened but never been used. Item Location Ships from our warehouse in Las Vegas, Nevada, 89102, USA Fast FREE Shipping We handle all paid orders within 1 business day. Best Offers Accepted Offers are reviewed at the close of business each night. We accept reasonable offers for - Multiple units of the same item - Errors or condition changes within our listing - Combining shipping for 2 or more separate orders Return Policy We offer a 30 day return window from when you receive the item. Items must be in the same condition and in original packaging. Product Description STUDOR, INC is the distributor of the STUDOR brand of Air Admittance Valves (AAVs) for the plumbing industry in the USA, Canada, Mexico and Puerto Rico. The STUDOR AAV can be used in lieu of expensive and complex plumbing (open pipe) vent systems that penetrate roofs of buildings. The unique design of the STUDOR MINI-VENT provides plumbing ventilation to prevent the loss of water seals in traps without the need for costly roof penetration and vent piping. Can be used as an individual, branch, circuit or stack vent Fits 1-1/2 in. and 2 in. pipe sizes Vent up to 160 DFUs on a branch Vent up to 24 DFUs on stack Expands architectural design limits Reduces the number of fire-stopping applications Exclusive vermin protection system Residential or commercial use