For five decades, +osb has been helping the plumbing industry work smarter — not harder. What started in 1975 as a small Canadian manufacturer with a mission to make things easier for contractors and plumbers has grown into a trusted name in plumbing solutions across North America. Now, as +osb (formerly OS&B) celebrates its 50th anniversary, the focus is squarely on the road ahead.

“Anniversaries are a natural time to reflect,” said Brad Cornelissen, CEO. “But for us, the bigger question is: Where are we going? Our priority is building the next chapter — through smart innovation, operational excellence and deeper customer partnerships.”

Today, +osb is the category leader in Canada — widely recognized as the go-to brand for bath wastes, shower drains, lavatory drains and specialty plumbing solutions. Among its standout innovations is the Island Tub Drain (ITD) — the original freestanding tub drain that set the industry benchmark and continues to define the standard. Trusted by contractors, engineers and wholesalers alike, +osb has built a reputation for delivering high-quality, installer-friendly products that perform under real-world conditions.

In the U.S., that same approach is earning trust and traction — backed by an extensive network of reputable manufacturer representatives across the country. This ensures that customers not only have access to industry-leading products but also to knowledgeable, local sales and support partners who understand the market and are ready to help.

The company’s forward-looking strategy includes continued investment in supply chain infrastructure, product innovation and digital tools — all designed to support distributors and contractors across North America. Most recently, +osb opened a new state-of-the-art production and distribution facility in Ontario, Canada, aimed at improving scalability and ensuring fast, reliable delivery.

“This new facility is a game-changer,” said Edward Andria, president. “It allows us to move product more efficiently, store inventory smarter and better serve customers on both sides of the border.”

That same momentum is reflected in +osb’s refreshed branding and new website — built for clarity, speed and ease of use. The updated look reinforces the company’s commitment to making installation intuitive and efficient, backed by a full lineup of precision-engineered plumbing products.

Beneath the surface, however, lies a much deeper strategy. “We’ve always stood for innovation and quality,” says Cornelissen. “What’s evolving is how we bring that value to market. From agile product development to next-gen customer tools, we’re leading the way in how modern plumbing solutions are delivered and supported.”

While proudly Canadian-owned and -operated, +osb’s close geographic and economic ties to the U.S. offer unique advantages — especially in today’s climate. Unlike overseas suppliers, +osb provides North American manufacturing, fast lead times and consistent compliance with shared codes and certifications. “We’re not just close in distance — we’re aligned in values, in service expectations and in our approach to doing business,” says Cornelissen. “That’s part of what sets us apart.”

At the heart of +osb’s continued growth is a people-first mindset. “Our long-term success depends on our partnerships — with our reps, our customers and our internal teams,” says Andria. “We believe in building trust, providing transparency and creating mutual success.”

As +osb expands its U.S. presence, it does so with the same entrepreneurial drive that shaped its early years. The mission remains simple: Make the complex simple for the people who rely on +osb every day.

“Fifty years in, we’re not slowing down,” Cornelissen added. “We’re doubling down — on innovation, on customer service and on being the partner you can count on.”