There is another design integration of regulators that has not been touched on extensively and it is the hoses. The main concern that most users want to be addressed is how long they are supposed to last and what they can do to extend their lifespan. Well, if you take the word of Dive Gear Express, they recommend replacing the hoses every five years or 500 dives. If you know you have eclipsed 500 dives before five years has passed, replace the hose. But, this does not mean that you still can’t take precautions to get the most out of their lifespan.
First off, it is wise to not store the hose in direct sunlight as the UV rays from the sun can be harmful to the materials of the hose. Secondly, do not flush the hose with harmful chemicals. All in all, they are not going to last forever due to age so it is wise to inspect them for damage before every diving trip.