Thanks for the reply. Checked all hose connections. It sort of landed more on my BCD. I checked for any obvious damage. When I dived I did ask one of my mates to check for bubbles, but there were none. Just mailed my instructor who is very knowledgeable, and he says if there is any unseen damage, it is generally apparent on the next dive. It will not degrade and fail over a number of dives. My next dive was shallow, and all seemed okay.When gear drops off the benches where I work, typically the bit that gets damaged is the hoses as previously mentioned. There is a metal collar a little less than an inch long where the hose screws in to the first stage and the hose often gets severed or damaged there. If you do switch out the hoses then take note of how easily they unscrew, does it feel like the threads are damaged? Take a look inside the port to check the threads in the 1st stage.
Its difficult to say without having seen the fall but thats the most common damage I have seen. somebody mentioned a service, sure, if all the pieces and parts come apart then go back together again without force then i guess they are all fine.
By any chance, when you went for the dive, did you ask anyone to look for bubbles coming from your 1st stage?
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