What is a Purge Valve on a Diving Mask?
Diving masks are an essential piece of gear for scuba divers, as they allow divers to see clearly underwater. But, have you ever wondered what that small valve near the bottom of some masks is for? That is called a purge valve, and it serves an important purpose.
How Does a Purge Valve in a Diving Mask Work?
When a scuba diver exhales into their mask, it can cause the mask to fill up with water. This is not only annoying but can also be dangerous if the water is obstructing the diver’s vision. The purge valve solves this problem by allowing the diver to clear the water from their mask without having to take it off.
When the diver exhales, the air is sent out through the purge valve instead of going into the mask. The valve is designed to be one-way, so when the diver stops exhaling, the valve closes, preventing water from entering the mask through the same path. This creates a constant flow of air that can effectively clear the water from the mask.
Do All Diving Masks Have Purge Valves?
No, not all diving masks have purge valves. In fact, some divers prefer mask models that do not have purge valves. Many argue that purge valves can be more prone to malfunction or failure, which could cause water to enter through the valve and compromise the mask seal.
Others prefer masks with purge valves because they find it easier to clear water from their mask quickly and efficiently. It ultimately comes down to personal preference and comfort level.
Are Purge Valves Necessary for Diving?
Purge valves are not necessary for diving, but they can make the experience more comfortable and enjoyable. It is possible to clear a mask without a purge valve, but it requires more effort and technique. Some divers prefer to use techniques such as the “blowing out” method, where they exhale forcefully through their nose to expel water from the mask.
In conclusion, a purge valve in a diving mask is a small but useful feature that can enhance the diving experience. It allows divers to clear their mask quickly and efficiently, which can help maintain visibility underwater. Whether or not to use a mask with a purge valve ultimately comes down to personal preference.
