AP Valves (AP Diving)

The Architects of the Silent Revolution

If you walk along the deck of any hard boat in the UK—from Plymouth to Scapa Flow—you will see a piece of kit that defines British diving history: the yellow “Buddy” Commando BCD. For decades, AP Valves (now AP Diving) has been the backbone of the UK diving community, providing the rugged, indestructible buoyancy systems that trained a generation of divers. But their story is not just about tough jackets; it is about a technological revolution that changed the face of exploration forever.

Founded in Cornwall in 1969 by David Parker, AP began with a simple mission: to solve the problems that divers faced in the water. It started with the invention of the “Buddy” jacket, the first BCD to feature a dedicated emergency mini-cylinder, giving divers a redundant source of buoyancy long before it became a standard safety recommendation. This refusal to accept the status quo is the DNA of the company. While other manufacturers moved production overseas to cut costs, AP doubled down on British manufacturing. Today, 95% of every product is manufactured in-house at their Water-ma-Trout factory in Helston. They don’t just assemble parts; they injection mould the plastics, machine the brass, and weld the electronics.

However, AP’s true legacy lies in the “Yellow Box.” In 1997, they launched the Inspiration Rebreather, the world’s first production Closed Circuit Rebreather (CCR). Before the Inspiration, rebreathers were the domain of military clearance divers—expensive, temperamental, and incredibly dangerous. AP Valves democratised “silent diving.” They built a unit that was robust, electronically intelligent, and capable of taking sport divers to depths previously thought impossible.

For the UK technical diver, AP is not just a brand; it is a partner in exploration. Their Vision electronics system, with its unique dual-oxygen controller redundancy, offers a safety margin that is the envy of the industry. Whether it is the legendary Commando BCD that refuses to die after 20 years of abuse in salt water, or the Inspiration CCR facilitating a 100-metre wreck exploration, AP Diving represents the pinnacle of British engineering: practical, innovative, and absolutely uncompromising on safety.