Re: I know this'll bring interesting conversation (p-valve)
Posted: Wed Apr 25, 2012 4:36 pm
I've done a dive without priming an unbalanced valve (borrowed suit) and I will put up with the leak risk.
Established 2005
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Hhahaha - At least i didnt in your boat!CaptnJack wrote:I've found all the worry about the tube crushing or whatnot to be much ado about nothing. The balancing duckbill is just another place for water (or urine) to leak. Right Koos?airsix wrote:I converted mine from balanced (over complicated and bulky) to unbalanced (simple & effective) a while back and have no regrets and less laundry.
So what happened?LCF wrote:I've done a dive without priming an unbalanced valve (borrowed suit) and I will put up with the leak risk.
What tubing did you use for the replacement?kdupreez wrote:Hhahaha - At least i didnt in your boat!CaptnJack wrote:I've found all the worry about the tube crushing or whatnot to be much ado about nothing. The balancing duckbill is just another place for water (or urine) to leak. Right Koos?airsix wrote:I converted mine from balanced (over complicated and bulky) to unbalanced (simple & effective) a while back and have no regrets and less laundry.
yeah, the balancing check valve failed and i ended up being flooded.. so removed the balancer and replaced with less rigid tubing and removed the "quick disconnect".. about 8 dives post conversion and have yet to have a problem..
I used to have that nightmare almost every night. So, I decided to stop eating my normal bedtime snack, which was a cobra venom omelette, made with 10 turkey eggs. That helped, but it didn't stop them entirely. So, acting on some clues I gleaned from my horoscope, I booby trapped my vacuum cleaner by hooking it up to the electrical feed that powers my stove. When I woke up the next morning, I found an unconscious Spatman with 3rd degree burns on his hands lying sprawled over my extensive collection of stuffed "hello kitty" plushie dolls. Cured my nightmares, but it ruined my vacuum cleaner.LCF wrote:Well, imagine delicate tissues being suctioned violently into a tube . . .
Joshua Smith wrote:I used to have that nightmare almost every night. So, I decided to stop eating my normal bedtime snack, which was a cobra venom omelette, made with 10 turkey eggs. That helped, but it didn't stop them entirely. So, acting on some clues I gleaned from my horoscope, I booby trapped my vacuum cleaner by hooking it up to the electrical feed that powers my stove. When I woke up the next morning, I found an unconscious Spatman with 3rd degree burns on his hands lying sprawled over my extensive collection of stuffed "hello kitty" plushie dolls. Cured my nightmares, but it ruined my vacuum cleaner.LCF wrote:Well, imagine delicate tissues being suctioned violently into a tube . . .
The norprene tubing doesn't crush, the problem becomes that since the volume of the tube is constant but now under lower pressure compared to your suit, "you" get sucked into the end of the tube trying to equalize the pressure. (in theory - I just leave my bolt open and incompressible water goes in the tube and stops this from happening)Norris wrote:I am a somewhat newer user of the unbalanced valve and read a BUNCH of dicsussions on the subject. One of the most prominant was the "priming" topic. Now I dove a couple times and made sure to prime and all was well. Two times now, however; I just wasnt able to do so. It just wasnt happening, so I threw caution to the wind and went for it (lost the exterior valve screw in the first two weeks). When I was finally able to utilize my valve all went well and none of the horror stories happened, and this was at about 60fsw.
So my question is does the issue happen when you have a less than ideal adhesive contact? I mean what atmosphere would be enough to cause too much pressure to not allow fluid to come out of the tube, and even furthermore cause a blow out? As I stated before, the wide bands work spectacular and many can attest to the fact that removing one can be a delicate timely process. It seems to me that the priming step might not be as detrimental as I thought? Maybe 100+ feet would change the outcome?
Why you gotta bring up old shit? I replaced that damn vacuum cleaner and had brand new HK plushies imported from Japan for you, yet you still can't let that go. Do I keep bringing up that time you and Calvin stole my Snufalufagus costume to take to that candy rave, only to destroy it by letting those stoned teenagers rub pixie sticks and tangy taffy into its fur? No. So get over it, dude.Joshua Smith wrote:I used to have that nightmare almost every night. So, I decided to stop eating my normal bedtime snack, which was a cobra venom omelette, made with 10 turkey eggs. That helped, but it didn't stop them entirely. So, acting on some clues I gleaned from my horoscope, I booby trapped my vacuum cleaner by hooking it up to the electrical feed that powers my stove. When I woke up the next morning, I found an unconscious Spatman with 3rd degree burns on his hands lying sprawled over my extensive collection of stuffed "hello kitty" plushie dolls. Cured my nightmares, but it ruined my vacuum cleaner.LCF wrote:Well, imagine delicate tissues being suctioned violently into a tube . . .
I have a vague recollection of Bob saying that he once had the air in the hose get pushed up into his urethra, I believe due to having the bolt closed and crushable tubing. I don't remember the details, though. Maybe he'll chime in on this thread.CaptnJack wrote:The norprene tubing doesn't crush, the problem becomes that since the volume of the tube is constant but now under lower pressure compared to your suit, "you" get sucked into the end of the tube trying to equalize the pressure. (in theory - I just leave my bolt open and incompressible water goes in the tube and stops this from happening)
That may occur too, once the tubing finally crushes. Although you'd think parts of a catheter would ballon out.spatman wrote:I have a vague recollection of Bob saying that he once had the air in the hose get pushed up into his urethra, I believe due to having the bolt closed and crushable tubing. I don't remember the details, though. Maybe he'll chime in on this thread.CaptnJack wrote:The norprene tubing doesn't crush, the problem becomes that since the volume of the tube is constant but now under lower pressure compared to your suit, "you" get sucked into the end of the tube trying to equalize the pressure. (in theory - I just leave my bolt open and incompressible water goes in the tube and stops this from happening)
Where are you diving? I can swing one by cove 2 or possibly meet in Seattle vicinity.johndo88 wrote:Need some assistance here, it can't wait much longer.
I've loaded up the car for a dive tonight and I seem to have misplaced my quick disconnect valve. Any ideas where I can purchase a new one locally (Bellevue, Seattle). I will be trying NAPA and West Marine.
Cheers,
John
One person's experience does not a trend make, but here goes anyway. I started out using a quick disconnect. The issue with a quick disconnect is that at the end of the dive I always had a collection of urine trapped between me and the quick disconnect. A few weeks ago I came down with a kidney infection, first time ever for me. I asked my doctor how I might have contracted this infection and after explaining how I had configured my P-valve, he thinks that was the cause. I made a point to rinse my valve after every dive but that was not enough. I have switched to a double-male barbed connector so now it's a straight shot from me to the ocean.sava6e wrote:Much appreciated on all the advice, just wanted to be sure before making a hole! I have another question regarding setup. I read a lot online that people fidgit around with hooking up and how it can be awkward around others, so my idea is why not get a short piece of tubing and attach a barb connector on it and then the quick connect on other end, this way before you leave in the morning or whenever you put the cath on that way everything is all tucked away and when you suit up its just a piece of hose you have to grab and push together real quick
You can connect easy enough in the back seat of your car, in a local bathroom, or just turn around on the boat. Part of being outdoors is accepting the fact that bears shit in the woods and divers pee in the sea.sava6e wrote:Much appreciated on all the advice, just wanted to be sure before making a hole! I have another question regarding setup. I read a lot online that people fidgit around with hooking up and how it can be awkward around others, so my idea is why not get a short piece of tubing and attach a barb connector on it and then the quick connect on other end, this way before you leave in the morning or whenever you put the cath on that way everything is all tucked away and when you suit up its just a piece of hose you have to grab and push together real quick