Quote: (Originally Posted by
Silent)
On both my Meg & Boris course I was taught to suck and blow through the mouthpiece with the dsv closed to check for exactly this kind of failure or to see if the cable tie holding it on had come loose.
Anyway glad to hear you came out of it unharmed.
Hi,
On a Ray DSV this is not possible because there is a hole to blow water off before opening it.
So this test can be achieved when air was sucked and mouth still on the mouthpiece, just hold on for a while and listen for any noise.