Finding the right fit for your Apeks Mk3 regulator is about more than just comfort; it is a critical safety and performance consideration. A regulator that fits correctly will respond predictably and efficiently, giving you precise control over your air supply in demanding environments. This guide breaks down the specific considerations for achieving the perfect Apeks Mk3 size setup, ensuring optimal balance and handling for any dive profile.
Understanding the Apeks Mk3 Regulator
The Apeks Mk3 is engineered as a high-performance second stage, built to deliver a consistent and breathable air supply regardless of depth or workload. Its balanced first stage design ensures constant pressure performance, but the second stage's interface with the diver is where personal fit becomes paramount. The standard configuration is designed to accommodate a wide range of face shapes, yet individual variations mean adjustments are often necessary.
Key Components That Determine Fit
Three primary components dictate how the Mk3 feels on your face: the mouthpiece, the diaphragm, and the purge cover. The mouthpiece shape and length directly influence jaw comfort and seal integrity. The diaphragm, which vibrates to allow air to flow, must sit flush against your palate without creating pressure points. Finally, the purge cover, used for clearing water, needs to be accessible without straining your mouth muscles.
Mouthpiece Selection and Adaptation
Apeks offers multiple mouthpiece styles to cater to different oral structures. The standard mouthpiece is suitable for most divers, but those with a shorter upper lip or smaller mouth may prefer the compact version. Conversely, divers with a larger jaw or longer palate might find the extended or sealed mouthpieces provide a better seal and reduced jaw fatigue during long dives. Trying several options is the only way to confirm your ideal match.
Assessing Your Facial Anatomy
Before finalizing your setup, evaluate your facial features to predict compatibility. Measure the distance from the bridge of your nose to your chin; a longer distance generally suits the standard Mk3 profile. Check your bite alignment—your teeth should naturally rest on the bite block without excessive gum pressure. If you have prominent front teeth or a deep overbite, you will likely require specific accommodations to prevent jaw pain.
Neutral Buoyancy and Balance
The position of the second stage can significantly impact your trim. A regulator that hangs too low or sits too high on the chest can cause you to tilt your head forward or backward, disrupting neutral buoyancy. When testing the Apeks Mk3, ensure the unit hangs vertically from the hose attachment point, aligning with your body’s center of gravity. This alignment minimizes drag and allows for effortless hovering.
Fine-Tuning Your Configuration
Once you have identified the correct base components, fine-tuning becomes essential. Adjust the harness straps to secure the regulator without creating gaps between the mouthpiece and your lips. The harness should feel snug but not restrictive, allowing you to open your mouth wide for purging without the unit shifting. Remember that a proper seal is achieved through the regulator's positioning, not by clenching your jaw.
Regular maintenance is vital to preserve the Apeks Mk3 size and fit characteristics you have established. Rinse the second stage thoroughly after each dive to prevent salt crystals from building up on the diaphragm and moving parts. Inspect the mouthpiece for cracks or deformation, and check the hose attachment for any signs of wear. A well-maintained regulator will maintain its factory-calibrated performance and fit exactly as intended.
