Hi Alec, try crimping a braided nylon hose, I bet you have better success. I had the opposite issue, 2nd stage refused air. I was in sidemount and used new "tek" rated braided nylon hoses. In sidemount you tuck in the hose along the tank under a rubber band, when deploying the 2nd stage I was surprised not to get any air out the regulator. Turns out my rubber band was a bit tight and I looped the hose away from the body, meaning when pulling it out partially, the hose kinked and the 2nd stage did not deliver. It was an easy fix underwater, but later I ditched the nylon hoses and went back to rubber where such problem is unheard of as you nicely demonstrated.
Hi Alec, great video as usual, please keep them coming. I know you have done a few videos featuring hoses, but I don't believe you have discussed the issue around a type of flex hose which uses an internal material that breaksdown. Its said this material breaks down and 'crystalizes' inside the hose ultimately restricting airflow. I know DAN is doing some research, but I have not seen much information on the topic and would be great if you could post your opinion on its truth and real world impacts. Your years of knowledge would surely shed some light on the issue.
That is an old problem with flex hoses. Almost every new reg sold now comes with a flex hose. Search this playlist for 'flex' as there are a few videos on flex hoses to answer your questions. A.
Alec, your buddy from the Conch Republic and Calypso regulator aficionado, wonder, how much time we have if the HP and LP hose blows off at half a tank, or even at 500 PSI. Should be fun to test it.
That's a great idea Miquel, something I'll get Kevin to test for me!. Look on TH-cam as there are a few videos around cut hoses and air time for LP and HP. Thanks for watching and send some warm air up to Canada please! A.
Actions on major air leak. 1) Summon buddy. 2) Make sure they get good GoPro footage of you tying knots in or biting the hose. 3) Ascend as fast as is safe to get it on social media ASAP😳
Great video! BTW you can easily tell if your vice grips are proper scuba specific ones, because the scuba ones are deliberately negatively buoyant and sink, whereas normal ones float, this is of course to avoid surface technicians and mechanics loosing your tools if they drop them in a river........ ;-)
Alec, here is a scenario: you're at 100ft, you got separated from your buddy and your first stage freezes up and starts free-flowing. Both your secondary and octo are dumping air like it's going out of style. Would you ever throttle back your tank valve to try to slow down the loss of breathing gas?
Never! Once a free flow starts, and no buddy, ascend slowly is the only action. As you ascend, passing thermoclines and monitoring air, the frozen 1st stage will warm by the time you reach 15' for a safety stop. I have had free flows that stopped as I ascended past a thermocline, dive is still over! Stay safe. A
Hi Alec. This made me think of medical oxygen tubing, they have a profile inside the tube to prevent the gas from stopping if the patient rolls over on the hose in their sleep. I hope those were not brand new hoses you destroyed? I recall being taught that if your reg freeflows then continue to use that partially inside your mouth, rather than using your safe second , just to save air on your way to the surface. Stay safe owen m
Divers can still breath from a free flow as taught in Open Water class. The hoses where Kevin's old rubber ones after he converted to flex hoses (hope I influenced his decision). Thanks for the medical info Owen. A.
The idea of a cutoff to my air is not a rec diver need. Only trained Tech divers would need such a device. Never had a need for one in 60+ years of rec or commercial diving. My view. A
very good topic any component that relies on fibers to guarentee its integrity should vever be kinked, this can be a hose, a suspension air bag , a belt, particulary a timing belt . A tire that had been driven flat has also been damaged so it should not been used where reliability is a concern this is due to the fact that fibers have been damaged and can fail at a moment where you don't need it. For sure, your video is a good warning to anyone that can be tempted to pinch a hose on a diving regulator The paradox is that the procedure of pinching hoses is widely used in the automotive industry for the low pressure fuel hoses and coolant hoses, it is acceptable because these hoses are not sollicited and the rubber membranes are sufficiently thick to protect the armature fibers
Basic engineering rule, divide actua material maximum by 2 to get the rated number. If it is rated for 150 PSI build it to handle up to 300 PSI since it will probably burst at 250 PSI in reality.
on a hose , the burst pressure should be 4 times the working pressure, the only exception is for grease where the burst pressure need to be only 2.5 times the working pressurem it is a standard in the industry.
Rubber LP hoses have working pressure printed on the cover. Few know their burst pressure is much higher. - Working Pressure 400 psi - Min Burst Pressure 2,000 psi A.
Closing the first stage is the only effective way to stop a free flow afaik. It requires access and enough training to not panic and confuse the 2 first stages. Side note: 30% off low pressure hoses, small grip damages, mint condition? 😁
Divers can still breath from a free flow, that's why it's taught in Open Water pool. Turning off the 1st stage stops the leak then what's to breath? Better keep Kevin close to me. A.
Love Kevin's laugh in the background
He never knows what I'm going to say.
A.
Hi Alec, try crimping a braided nylon hose, I bet you have better success. I had the opposite issue, 2nd stage refused air. I was in sidemount and used new "tek" rated braided nylon hoses. In sidemount you tuck in the hose along the tank under a rubber band, when deploying the 2nd stage I was surprised not to get any air out the regulator. Turns out my rubber band was a bit tight and I looped the hose away from the body, meaning when pulling it out partially, the hose kinked and the 2nd stage did not deliver. It was an easy fix underwater, but later I ditched the nylon hoses and went back to rubber where such problem is unheard of as you nicely demonstrated.
Thanks for sharing that interesting story and that rubber hoses are still needed.
A
Hi Alec, great video as usual, please keep them coming.
I know you have done a few videos featuring hoses, but I don't believe you have discussed the issue around a type of flex hose which uses an internal material that breaksdown. Its said this material breaks down and 'crystalizes' inside the hose ultimately restricting airflow. I know DAN is doing some research, but I have not seen much information on the topic and would be great if you could post your opinion on its truth and real world impacts. Your years of knowledge would surely shed some light on the issue.
That is an old problem with flex hoses. Almost every new reg sold now comes with a flex hose. Search this playlist for 'flex' as there are a few videos on flex hoses to answer your questions.
A.
Alec, your buddy from the Conch Republic and Calypso regulator aficionado, wonder, how much time we have if the HP and LP hose blows off at half a tank, or even at 500 PSI. Should be fun to test it.
That's a great idea Miquel, something I'll get Kevin to test for me!. Look on TH-cam as there are a few videos around cut hoses and air time for LP and HP. Thanks for watching and send some warm air up to Canada please!
A.
Actions on major air leak. 1) Summon buddy. 2) Make sure they get good GoPro footage of you tying knots in or biting the hose. 3) Ascend as fast as is safe to get it on social media ASAP😳
HA HA that's the best action. If only 4) post on TH-cam, was possible underwater. Thanks for the laugh Tim.
A.
Great content. Can you maybe show a safe way of decanting a pony bottle? Thank you for all great videos both of you put out. Greetings from Croatia.
Hello from Canada Skeksare. I will add that suggestion to my ideas list.
A.
Very cool test. I want to try it myself!!! I think the SCUBA Vise-Grips didn't work because you weren't in the water. LOL
Maybe if they were neutrally buoyant it would be easier, ha ha.
A.
I heard they go positively buoyant at the end of your dive
Great video! BTW you can easily tell if your vice grips are proper scuba specific ones, because the scuba ones are deliberately negatively buoyant and sink, whereas normal ones float, this is of course to avoid surface technicians and mechanics loosing your tools if they drop them in a river........ ;-)
Ha ha that's good Max. I should have mentioned its buoyancy. My bad.
A.
Are those scuba vise grips metric or standard? 😅
Both! Plus left and right handed, glutton free. Everything a diver wants in a tool.
A.
Metric is the standard, just not SAE
@@toriless, potāto...potãto
off to get some scuba vicegrips. thx!
Make sure to get the right hand, those left handed ones slip!
A.
Alec, here is a scenario: you're at 100ft, you got separated from your buddy and your first stage freezes up and starts free-flowing. Both your secondary and octo are dumping air like it's going out of style. Would you ever throttle back your tank valve to try to slow down the loss of breathing gas?
Never! Once a free flow starts, and no buddy, ascend slowly is the only action. As you ascend, passing thermoclines and monitoring air, the frozen 1st stage will warm by the time you reach 15' for a safety stop. I have had free flows that stopped as I ascended past a thermocline, dive is still over! Stay safe.
A
@@AlecPeirceScuba_SeaHunter Thank you for the quick response, Alec.
Good job
Thanks.
A
Hi Alec. This made me think of medical oxygen tubing, they have a profile inside the tube to prevent the gas from stopping if the patient rolls over on the hose in their sleep. I hope those were not brand new hoses you destroyed? I recall being taught that if your reg freeflows then continue to use that partially inside your mouth, rather than using your safe second , just to save air on your way to the surface. Stay safe owen m
Divers can still breath from a free flow as taught in Open Water class. The hoses where Kevin's old rubber ones after he converted to flex hoses (hope I influenced his decision). Thanks for the medical info Owen.
A.
Hey Alec. I love your videos! Question what do you think of the xs highland shut off valve that's made for regulators?
The idea of a cutoff to my air is not a rec diver need. Only trained Tech divers would need such a device. Never had a need for one in 60+ years of rec or commercial diving. My view.
A
I have that same second stage!
Good for you. We must share the same scuba gear hoarding genes. I keep almost everything and reuse a lot.
A.
very good topic
any component that relies on fibers to guarentee its integrity should vever be kinked, this can be a hose, a suspension air bag , a belt, particulary a timing belt .
A tire that had been driven flat has also been damaged so it should not been used where reliability is a concern
this is due to the fact that fibers have been damaged and can fail at a moment where you don't need it.
For sure, your video is a good warning to anyone that can be tempted to pinch a hose on a diving regulator
The paradox is that the procedure of pinching hoses is widely used in the automotive industry for the low pressure fuel hoses and coolant hoses, it is acceptable because these hoses are not sollicited and the rubber membranes are sufficiently thick to protect the armature fibers
Good points Jacques. Of course saving air is much more important than saving a hose that burst at 60'. Thanks for watching.
A.
Being in WA state I doubt I will make it by
Some day, never know.
A
What is the best way to flatten fins
Have Kevin step on them is my suggestion. Or if you happen to have a bulldozer like i do, use it.
A.
put your dive weights on them
Basic engineering rule, divide actua material maximum by 2 to get the rated number. If it is rated for 150 PSI build it to handle up to 300 PSI since it will probably burst at 250 PSI in reality.
on a hose , the burst pressure should be 4 times the working pressure, the only exception is for grease where the burst pressure need to be only 2.5 times the working pressurem it is a standard in the industry.
Rubber LP hoses have working pressure printed on the cover. Few know their burst pressure is much higher.
- Working Pressure 400 psi
- Min Burst Pressure 2,000 psi
A.
When ever I watch your videos, I feel like my name is Kevin.
Really? You mess up videos too? Ha, just joking as Kevin is an important part of these videos. He has to make me look and sound smarter than I am.
A.
@@AlecPeirceScuba_SeaHunter At my work, I'm paid to stand around and look good and I am really crap at it.
Closing the first stage is the only effective way to stop a free flow afaik. It requires access and enough training to not panic and confuse the 2 first stages.
Side note: 30% off low pressure hoses, small grip damages, mint condition? 😁
Divers can still breath from a free flow, that's why it's taught in Open Water pool. Turning off the 1st stage stops the leak then what's to breath? Better keep Kevin close to me.
A.
Are the vice grips titanium, lol
The very best stainless steel scuba vice grips money can buy. Comes with a handy zip loc bag to keep it dry at depth!!!
A.
Alec is SCUBA TP and SCUBA water bottles.
Maybe my friend.
A.
👍
Thanks.
A.
4k or more, as high as 5k
Could be.
A.
More like 70 to 120 PSI...
Thats still a lot of psi to stop.
A.