Quick connects for BOV, bailout cylinders etc.

Trick if you use the CEJN QCs: if you connect a CEJN QC to a standard smaller nipple, it won't connect of course, but the outcome is that the female QC will remain open and free flow (because you pushed in the little ball inside and it has now locked open).

This happens with the XS-Scuba CEJN female QCs (not sure about others).

So, it is a bit disconcerting insofar you are rapidly loosing all your gas.

The solution is simply to pull back on the black sleeve as you were trying to disconnect the QC, and the little ball is released locking the gas flow with pressure (all back to normal working conditions).

If you do not know about this beforehand and it happens underwater while you are trying to sort some other issue it can add to the task loading and maybe cause some fear/concern.
 
Digging up an old but very relevant thread. I've set my CCR up with plumbed in bailout thru to the BOV. I'm currently using the AP Valves GCS system as QD's but the amount of effort needed to connect them when they are pressurised has caused me to look for better options. Has anyone found any new options or what are the current recommendations?
 
I just installed cejn on all my hoses, bailout, bov...probably not as easy as QD, don't know, never had QD. The cejn works for me (so far)
 
I have the omniswivel bits and pieces for male and female and they seem to be working for me. I just used them last night for practice of lost diluent and they worked great.

I'm not sure I have the best procedure for practice out there but I have my bailout cylinders with regular bc nipples in addition to LP reg hoses with omniswivel. I shut down my dil, connect my off board cylinders via the omniswivel, switch to open circuit on my bailout valve and breath for a few minutes.

Depending on what rebreather you have you may need to add some kind of manifold.

The hammerhead is great because it has both an Oxygen and a Diluent manifold so once I plug in my off board it immediately runs my BOV, MAV, ADV, and wing. I had my drysuit connected as well but figured I should use a different cylinder for that so I now plug in from a separate tank.

I'm always playing around to see what configuration i like so I am not saying this is the best way to do things. For a while I was into the Dave Sutton recommendation for off board connections they have on the cis-lunar but didn't want to spend $400 per connection (i think it was something like that..)

Garth
 
Can I ask why you are looking at trying to connect/disconnect the GCS underwater?

I have my BOV feed from the manifold (along with the ADV and MAV) this is then feed from the DIL 1st stage. From the DIL first stage (LP Side) I have the AP GCS Male connector. On my BO I have the female end. When I get kitted up I plug together and pressurise. I can then turn off/on the onboard DIL and use the BO or vice a versa. In normal running I have a Flowstop at the BO end (connected to the 1st stage) to stop it using it for DIL, in the event I need to swap over to BO, a) I can use the onboard 3ltr and then b) I can just slide the flowstop and the BO will then feed the BOV.

This is obviously running on the bottom mix, if my BO plans involves another mix of OC gas, I would at that time, come off the BOV and use a normal reg for that gas.

Rich

RedSeaDiver said:
Digging up an old but very relevant thread. I've set my CCR up with plumbed in bailout thru to the BOV. I'm currently using the AP Valves GCS system as QD's but the amount of effort needed to connect them when they are pressurised has caused me to look for better options. Has anyone found any new options or what are the current recommendations?
Click to expand...
 
I have two whips on my bail-out cylinders. One with a BC QD which can feed gas to dil and O2 MAV's, or a secondary feed to suit and wing. The second whip has an Omniswivel CEJN connector which feeds, via Y-blocks and a switch block, to the BOV. Using check valves I can shuttle between dil, deep BO, shallow BO and O2 feeds. The basic rule here is that BC connectors feed the loop, high flow CEJN feed OC BO. I'm usually diving solo with a camera but if team diving I carry a couple of extra CEJN whips which I can fit to other cylinders (buddy or hang gas) to facilitate gas sharing. Having previously owned a Sentinel fitted with the off-board gas blocks I did consider plumbing off-board gas into my JJs ADV and solenoid but decided that plugging into the O2 and dil MAVs with their BC connectors offered greater system redundancy and flexibility.

Tim
 
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My routing (for the moment)
* 3 L dill feeds wing ,adv and BOV ( for sanity breaths but also possible to connect directly to BO) mav button on the back and MAV(gasblock) in the front.
* 1L bottle for drysuit.
* Extra hose with male cejn nipple and flow stop to connect BO if wanted, if connected to this hose BO feeds BOV, ADV , wing and front Gasblock, Dill turned off at this moment.
*Gasblock in front with DiLL , o2 connected and extra cejn male for whatever offboard gas. Drysuit has also cejn so can take any BO botle if 1L runs empty.

Now you can shoot me :)
 
thetrickster said:
Can I ask why you are looking at trying to connect/disconnect the GCS underwater?
Click to expand...
I use the Kirby Morgan M-48 Mod 1 fullface mask with the CCR. My dil feeds into an Omniswivel switchblock, as does a whip with a GCS on it for connection to bailout. Using the switchblock I can swap from dil to bailout easily, and then just disconnect and reconnect the GCS when switching from one bailout gas to another.
 
RedSeaDiver said:
I use the Kirby Morgan M-48 Mod 1 fullface mask with the CCR. My dil feeds into an Omniswivel switchblock, as does a whip with a GCS on it for connection to bailout. Using the switchblock I can swap from dil to bailout easily, and then just disconnect and reconnect the GCS when switching from one bailout gas to another.
Click to expand...

Same reason for my set up, also with the KM48 mod1
 
A thought has occured to me - if I added a second Omniswivel switchblock that feeds into the first switchblock (along with the Dil) then I could connect both bailouts to the second switchblock at the start of the dive and then just swap from one to the other using the rotary switch on the switchblock - much less faffing around than disconnecting and then reconnecting bailouts after things have turned to poo
 
Just with anything else there is a little practice needed to connect disconnect underwater etc.

The reason why I don't connect at the beginning of the dive is that the person who may need the gas may be a buddy. If we all have omni in all of our bottles it will be a lot more options for the team.

I admit there are options that take less fussing around but I usually only connect during drills.


Garth
 
Omniswivel QDs are very difficult to connect while pressurized. Disconnecting isn't as difficult, but still not as easy as I would like. I have been told the Swageloks are a lot easier.
 
I was originally going to get the swageloks but asked around my dive circle in North Carolina and they all had omni so I chose to go with theirs so that I could use their bailout gas if necessary... ;-). And well vise vera


Garth
 
I have had the AP connectors on my BC/wing since the early 90's when they brought out the AutoAir. It is near impossible to connect when pressurised. On my suit I've always had the CEJN connectors and they are a bit easier to connect.

I recently mangled a CEJN hose on a wreck, is there anywhere that can remove and refit the connectors with a new hose ?
 
scubascooby said:
I have had the AP connectors on my BC/wing since the early 90's when they brought out the AutoAir. It is near impossible to connect when pressurised. On my suit I've always had the CEJN connectors and they are a bit easier to connect.

I recently mangled a CEJN hose on a wreck, is there anywhere that can remove and refit the connectors with a new hose ?
Click to expand...

yes the larger auto type fitting are hard to pop off and plug in when pressurised , i needed to add a juble clip to the female side to help with popping it off , works v well then,
the lp qc,s are simple to fit under pressure ,
 
scubascooby said:
I have had the AP connectors on my BC/wing since the early 90's when they brought out the AutoAir. It is near impossible to connect when pressurised.
Click to expand...

Never had any trouble disconnecting and reconnecting them under pressure. I practice on every dive never failed to reconnect one yet.
 
kwinter said:
Omniswivel QDs are very difficult to connect while pressurized. Disconnecting isn't as difficult, but still not as easy as I would like. I have been told the Swageloks are a lot easier.
Click to expand...

I have swagelok QC6's on my bailouts. They are easy to connect and disconnect under pressure. I keep the male on the tank and female on the rig so it is just a tug down on the connection to disconnect. Also keep a second whip with a conventional BC QC for others to connect to or for my MAV.
 
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