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Additional Company Info

Foundations in Drainage Ventilation Technology Spanning over Four Decades

The Studor AAV was initially developed by Sture Ericson, a Swedish born air conditioning engineer, who built and designed a pre-fabricated plumbing unit in 1969, taking the basic principles of drainage system architecture to a new chapter. Back then, this was the first industrialised idea for making fast-track plumbing and the concept was soon taken to high rise developments in Stockholm, Gothenburg and also Denmark with great success.

Sture applied for the patent on his first designed valve – the Bjare Valve – in July 1973. It was named after a specific region of Sweden where his factory was located. The Bjare valve was a great technological advancement because by installing it there was no need to break the seal in the roof of a building with the drainage ventilation pipe. This meant that the plumber, carpenter and roof layer no longer had to be present on site at the same time, and therefore providing a more cost effective drainage ventilation solution by eliminating the need for a roof penetration. Nowadays this is considered a great green benefit for any building.

A Drainage Solution Pioneered by Gravity

The idea of the Bjare valve was based on the principle that to open a valve you just needed negative pressure and this was simply provided by falling water. This was unlike the air conditioning units Sture was used to in his main business at the time, which required fans to create both negative and positive pressures. So the idea of the Bjare valve was born, and this investigative process was supported by real applications Sture was involved with and needed to provide solutions for. Sture genuinely needed a new design of a drainage system to provide a suitable solution for a hospital in Denmark he was working on.

The Bjare Valve
The Bjare Valve

Since this time back in the early 1970s, Studor AAVs have undergone continual improvements and development to ensure that they meet the highest of international standards/approvals and evolve with the challenges of modern day construction methods. Development and progress was not always straightforward though, with the first industry official in Antwerp in the early 70s liking the concept of the valve, but having a concern about flies and bees entering. So after this feedback a mesh was added and the valve was practical for its purpose.

Opportunities for Growth

Sture met Doris and STUDOR (STUre & DORis) was conceived in 1975. At this time she introduced Sture to her older brother Frank, a well networked sales professional who went on to become the first distributor on the continent (for Belgium). Studor valves are still sold by the same distributor in Belgium to this day (Necap), who sell the highest amount of valves per capita in the world out of all the international distributors.

At this critical growth stage of the business, Sture also went to hardware show in August 1975, which was to do with the Swedish export association. After his visit, Studor received a large request for hundreds of thousands of valves for the US market. After years of working with the code bodies in the US, this eventually became their Studor’s largest market and therefore a turning point in the company’s history.

Evolution of the Product Portfolio

The first industrial moulded valve was made in Belgium in August 1979 – the Maxi-Vent. Next in production was the Mini-Vent in Holland and then swiftly followed by the Combi-Siphon, around the same time, 1981. The Combi-Siphon got a gold medal at the Batimat industry show March 1981. This was a wonderful testimonial for the quality and performance of the Studor products and this helped establish the company as a leading player in drainage ventilation technology advancement.

Taking Studor to the US

Europe was gathering great momentum within its first decade of trading and the money made in Europe was invested into the entry into the US market in 1986; a difficult and costly exercise and one that required a change of approach to adhere to the US industry codes. Studor, Inc. was founded in 1988 in Clearwater, Florida – 5 years before its first valve was sold. This business was then sold to IPS Corporation on 31st March 1998, who remain a distributor of the Studor products for North America, Canada and Mexico to this day.

Research, Development and Continual Progression

Sture and Doris have continually invested time into research and development so that Studor remains market leader in a highly technical discipline. It is very difficult to make an excellent quality air admittance valve with the perfect membrane manufactured by the most precise of tooling.

Membranes have to be extremely correct; they must be exactly seated, as the slightest warp will make the valve leak, as there are very marginal tolerances in the valve. Studor has always challenged its own designs to continually improve and so maintain its position as the leading manufacturer of drainage ventilation technology across the world.

Studor has worked with the following countries and their universities so they can remain leaders in drainage ventilation technology – Taiwan, Japan, Brazil and Scotland.

For further information about Studor, please do not hesitate to contact us.