Sture Ericson developed the air admittance valve in Sweden in the
early 1970s. He introduced the valve to the United States in 1986
and was instrumental in the development of of the ASSE Performance
Standards 1050 and 1051, as well as gaining code approvals in state
and model codes. In 1988, Studor, INc. was established as the distributor
for North America. Studor, Inc. was acquired by IPS Corporation
in 1998.
Studor has pioneered AAV technology since its introduction in the
USA, and accordingly the industry refers to AAVs as 'Studor vents',
the brand name in the industry. The development of AAVs has led
to new and different ways to vent a plumbing drainage system. AAVs
are an innovative way to replace the vent piping for a sanitary
drainage system that extends through the roof to the outdoors.
Millions of valves have been installed worldwide. In the future,
when fully implemented , the use of Studor AAVs in building plumbing
systems will create significant cost savings and contribute to a
cleaner environment by keeping sewer gases in the sewer system.
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