Jack
Beuschel is the president of Studor, Inc., the distributor of the Studor brand
of air admittance valves (AAVs) in the United States, Canada, Mexico and Puerto
Rico. Beuschel is an active member of ASSE and is on the AAV Working Group.
Beuschel works closely with various listing and certification organizations, as
well as with the manufacturers of Studor AAVs and other related products for
DWV systems. Contact him via phone at (800) 447-4721, via fax at (727)
734-7753, or via e-mail at beuschel1@aol.com.
There
are few real mysteries remaining about the mechanisms at play in building
drainage and vent systems. At the center of the drainage system’s integrity is the water trap seal, which
stops sewer gas from entering a habitable space from the sewer. It comes as a surprise to many that the flow of air is as important, if not
more important, to the safe operation of the drainage system as the flow of
water. The
unsteady nature of the water flows causes pressure pressure transients, which can compromise water trap seals and provide a path
for sewer gases to enter the habitable space.