Pull dump or non exhaust elbo

[orange_diver]

long before going DIR i completely separated my pull-dump from my bc just by using it like it was made to be used -- pulling it. i always had it serviced etc etc.

i was never in danger, it was a no big deal warm water rec dive and i was at depth ascending anyway but i'm a big believer that those things WILL fail.

 

[pengwe]

I always use a pull dump in the inflator and have not seen any problems other than the steel cable corrodes and breaks eventually (why do the idiots use crimped steel cable, when crimped 300 lb monofilamnt fishing line would last forever and "never' fail or wear out?)

Do you think it would be possible to replace the wire with fishing line?

 

[dumpsterDiver]

Do you think it would be possible to replace the wire with fishing line?

I have replaced the broken wire on 2-3 (at least) BC's that I've owned. They often use a very thin stanless wire that has a plastic covering, but when they apply the metal crimp, it cuts through the plastic sheath and accelrates corrosion at that location. I actually went so far as to directly bitch to sea Quest about it, but it seems they have not changed.


When the wire breaks, it only affects the pull dump capacity of the inflator, but I guess it could facilitate damage to the hose, if the wire is not there to take the strain of a hard tug.

Of course 200-300 lb monoline will work! It is really unbelievable that they would use inferior materials that probably cost more than monofilament.

 

[rainman_02]

But none of that matters in this forum. Please take your discussion of non-DIR gear choices elsewhere.

 

[pengwe]

Yes, of course. Sorry.

 

[scottgrizzard]

My problem with the pull dump is the way it sticks out, inviting damage to itself and the seal to the bladder. I like the way Apeks has one that is low profile.

I have an elbow with a pull dump on my recreational (sport) rig; I like the convenience, and I especially like it when supervising recreational divers, as it allows me to quickly dump head up when I grab a diver shooting for the surface.

The elbow dump comes and goes on my penetration rig, since it lets me dump in tight corners with either hand if I am in a head-up passage. I don't have one on my deep rig, because I don't think the benefit there is worth the extra point of failure.

I put cave line in mine to stop the rust and sharp edge problem, and I replace it every year. I never thought of fishing line; I will have to try that.

As for DIR, I think it is the right default rig, and very good strong guidelines. You can deviate if you have a reason, but it should be a good reason, and you need to know why the rule is there and understand the tradeoffs before making the change.

 

[eightytwenty]

My problem with the pull dump is the way it sticks out, inviting damage to itself and the seal to the bladder. I like the way Apeks has one that is low profile.

I have an elbow with a pull dump on my recreational (sport) rig; I like the convenience, and I especially like it when supervising recreational divers, as it allows me to quickly dump head up when I grab a diver shooting for the surface.

The elbow dump comes and goes on my penetration rig, since it lets me dump in tight corners with either hand if I am in a head-up passage. I don't have one on my deep rig, because I don't think the benefit there is worth the extra point of failure.

I put cave line in mine to stop the rust and sharp edge problem, and I replace it every year. I never thought of fishing line; I will have to try that.

As for DIR, I think it is the right default rig, and very good strong guidelines. You can deviate if you have a reason, but it should be a good reason, and you need to know why the rule is there and understand the tradeoffs before making the change.

Holy necro Batman!

I'm sure using a shoulder pull dump is all very well and good, but it's not DIR. I personally had a few fail before I started diving within the DIR system. I have since knocked the pins out and disconnected the cables, leaving me with standard K-Inflators. I've also never felt the need to pull on my corrugated hose to vent gas, but I've also never been in a situation so tight that I was unable to access my dump or inflator hose. Maybe someone with more experience than me in physical overheads can chime in?

As for the pull dump sticking out, have you ever damaged a pull dump because it was protruding from your rig? I personally can't say I have. I don't like Apeks because they do use that proprietary low profile dump. My Halcyon wing and SMB use the same OPV if damage were to befall my hip dump. The phobia that a dump sticks out too far seems like a nothingburger though.

 

[nadwidny]

I'm waiting for DumpsterDiver to wade back in on the convo.

 

[scottgrizzard]

I've also never felt the need to pull on my corrugated hose to vent gas, but I've also never been in a situation so tight that I was unable to access my dump or inflator hose.

For overhead, "need" is too strong a word. "Convenient," is better... I like to use my right hand to dump gas sometimes, while keeping my light ahead of me and not switching light hands.

For supervising silly divers, "need" is the correct word. You haven't lived until a diver pushes the elevator button in front of you. (We all have to make a living.)

As for the pull dump sticking out, have you ever damaged a pull dump because it was protruding from your rig?

Nope... I looked at it and decided it was a bad idea. No experimental data on that.

I don't like Apeks because they do use that proprietary low profile dump.

I know, right!? Evil companies...

My Halcyon wing and SMB use the same OPV if damage were to befall my hip dump.

Cool!

The phobia that a dump sticks out too far seems like a nothingburger though.

Phobias are like that... not supported by experimental data... only by a cursory examination.

 

[eightytwenty]

For overhead, "need" is too strong a word. "Convenient," is better... I like to use my right hand to dump gas sometimes, while keeping my light ahead of me and not switching light hands.

For supervising silly divers, "need" is the correct word. You haven't lived until a diver pushes the elevator button in front of you. (We all have to make a living.)


Nope... I looked at it and decided it was a bad idea. No experimental data on that.

I know, right!? Evil companies...

Cool!

Phobias are like that... not supported by experimental data... only by a cursory examination.

Glad to know your fears are based off of no real evidence. You might find the Hogarthian board is more willing to listen to your reasoning as to why you like shoulder dumps.

Can you explain what about the shoulder dump is more convenient than pressing the deflate button? I've never personally felt the need for the shoulder dump, even when students mashed the inflate button at the bottom. Certainly not a need in my eyes.