Hi all,
I have a used closed dsmb that one inflates by blowing into or connecting a LP hose. However, this valve is no longer a 1 way valve, I.e. you can put air in and it can escape back out almost as easy. It works well enough as a dsmb as the valve is close to the bottom so when inflated on the surface it does not lose all its gas. I imagine there's a mushroom valve in there that is folded or dead but it's not easy to take apart, and if I do I'm not confident I'll get it back together. I had this happen to me years ago early on in a dsmbs life and the shop just replaced it. Here's a picture for reference:
I have a used closed dsmb that one inflates by blowing into or connecting a LP hose. However, this valve is no longer a 1 way valve, I.e. you can put air in and it can escape back out almost as easy. It works well enough as a dsmb as the valve is close to the bottom so when inflated on the surface it does not lose all its gas. I imagine there's a mushroom valve in there that is folded or dead but it's not easy to take apart, and if I do I'm not confident I'll get it back together. I had this happen to me years ago early on in a dsmbs life and the shop just replaced it. Here's a picture for reference: