RBSM - Rebreather Safety Mouthpiece

The Rebreather Safety Mouthpiece is included as standard with all new Inspiration units.

The key advantages of the new RBSM are improved comfort and greater rebreather safety.

The head-strap holds the mouthpiece firmly in position allowing for a very relaxed grip on the bite and significantly reducing jaw fatigue on longer dives.

The crucial safety benefit is that the RBSM greatly increases the likelihood that the diver will remain on the loop in the event of going unconscious for whatever reason. Correctly fitted, the RBSM will help protect the airway, help prevent water aspiration, loop flood and loss of buoyancy – effectively delaying drowning and buying time for the situation to be recovered. The RBSM also reduces the task-load on a rescue diver who does not have to hold the mouthpiece in place during the rescue.

 Key Design Improvements:

• Soft Rubber Mouthpiece with Lip-Guard.
• Comfortable Neoprene Head-strap.
• Strong, easy-adjust 25mm webbing straps with a quick-release snap connector and adjustment tabs at the rear.
• Swivel connectors to the mouthpiece.

Mouthpiece with Lip-Guard

The comfort mouthpiece is a one-piece elastomer moulding with a lip-guard flange.

• The shaped lip-guard is a key element in the improvement to comfort and security.
• Together with the comfort head-strap it allows you to relax your jaw, so you no longer need to bite down on the lugs – greatly reducing jaw fatigue.
• A lighter grip on your mouthpiece also decreases the wear on this part, increasing longevity.
• The single moulded part is easy-to-clean and is both more hygienic and more secure than a two part glued-vulcanised mouthpiece.
• It can be purchased and replaced separately from the head-strap when necessary.

Neoprene Headstrap

We have gone for a “slap-strap” style design providing comfort, stretch and easy fitting.

• The neoprene is easily distinguishable from your rubber mask-strap and importantly, it is easy to slide on and off your head over these straps without snagging.
• Ideally worn below the crown of the head - effectively at the back of the neck - it absolutely clamps the mouthpiece in place and will not slide off when you jump in.
• Properly fitted, it offers great psychological security, knowing that you can’t lose your mouthpiece.

Rear Adjustment Webbing with Quick-release

We have designed the adjustment at the rear of the strap instead of the front. You tighten the straps by pulling the webbing tabs forward against the resistance of your head.

• Easy to tighten and prevents pulling on the mouthpiece itself.
• The adjustment tabs are out-of-the-way at the rear, not dangling near your mouth.
• The large webbing tabs are easy-to-locate and use, even with thick gloves.
• Easy-to-find slider buckles on either side make it simple to slacken off.
• A 25mm snap connector allows for quick-release and removal of the RBSM.
• The RBSM can be fitted so that the quick-release is on the left side of the head, if preferred by left-handed divers.

Swivel Hinges

Small design features that make a big difference:

• The swivel hinges connecting the mouthpiece to the head-strap allow it to be worn at different angles - with the neoprene strap in your preferred position - without scrunching or distorting the mouthpiece.

Please Note: It is important to practice all the above drills routinely both before and after entering the water to be able to locate the adjustment and release mechanisms with whatever gloves you use. Also, be aware that the strap may need tightening slightly at depth due to compression of the neoprene and your hood.

The starting point for mouthpiece comfort is always to have your hose weights adjusted correctly and your breathing hoses cut to the right lengths so that the mouthpiece sits in your mouth without tension. The RB Safety Mouthpiece offers additional protection against jaw fatigue.

The RBSM can be fitted:

• to the rigid post of the AP standard white mouthpiece or
• to the rigid post of the AP Open Circuit Bailout (OCB) mouthpiece.

Fitting is with a cable-tie which is included with the kit. The cable-tie MUST be properly applied with a cable-tie gun to the correct tension of 165N.

You MUST NOT attempt to hand-tighten the cable-tie or to use pliers or other grips, which may damage the rubber and runs a serious risk of not fitting the mouthpiece securely.

See the RB Safety Mouthpiece Fitting Instruction video online here.

https://youtu.be/G6CroTn74qU

or in the Resources section of the website:

https://www.apdiving.com/en/rebreathers/resources/videos/