Dumping Air Under Water

[happy-diver]

This reminds me of a guy here on SB who used to go with the handle "Dumpster

Here's Jim

 

[Doc Harry]

...dumping...

Heh, heh.
You said "dumping."

 

[sea_ledford]

Dive Rite Remote Exhaust Elbow

Dive Rite Remote Exhaust Elbow with Nut and Pull Cable in three lengths.

www.divegearexpress.com

OMS Remote Exhaust Elbows

OMS Remote Exhaust Elbows w/Cable and Gasket

www.divegearexpress.com

I add shoulder dumps to all my wings

The fastest safest way in an emergency

That's funny, I remove all of mine!

 

[Divin'Papaw]

That's funny, I remove all of mine!

+1. Useless garbage. I specifically buy wings that don't have them. If I ever bought a wing that had one, the first thing I'd do is replace it.

 

[AdivingBel]

Hmph...I thought they were there so if your inflator valve failed you could "tug the hose" to buy yourself a second to disconnect the inflator hose...shows what I know. The only time I use mine is end of trip rinse while doing the Zeagle/garden hose water show...

 

[sea_ledford]

In theory pull dumps are great. In reality they are a maintenance hassle of limited positive value, and more than once I've seen people pull on hoses so hard they rip them off the shoulder connecter.

They are also a complete pain during a rescue class. They get pulled accidentally pretty regularly and end up dropping the patient back underwater, or to the bottom, depending on when it gets pulled. Entertaining to watch for sure though!

 

[Wibble]

In theory pull dumps are great. In reality they are a maintenance hassle of limited positive value, and more than once I've seen people pull on hoses so hard they rip them off the shoulder connecter.

They are also a complete pain during a rescue class. They get pulled accidentally pretty regularly and end up dropping the patient back underwater, or to the bottom, depending on when it gets pulled. Entertaining to watch for sure though!

A really good point. The standard hose dump needs a positive action to dump. It’s possible that should the valve fail, e.g. jams or spring fails, it should be possible to stop the leak with your hand over the “mouthpiece”.

With the pull dump, any pull on the hose can dump. A panicking diver could, maybe, pull the dump. Similarly pull the dump if dekitting on the surface.

In other words, the normal dump needs a positive action to activate the dump, whereas the pull dump can be involuntarily activated. Convenience comes at a risk.

 

[hendrik jr]

I would like to know if the Mares XR REC wing dump valve is a standard size or not , anybody knows?
Thx

 

[happy-diver]

No

 

[astr0b0y]

I only shoulder dump now, as of a few weeks ago when I was soundly schooled after reading Happy’s post. It’s the best. Breath out and pull and I am sinking in perfect trim and equalising before all those other hand up suckers. Owe you a ginger beer mate.