Backup Regulator Necklace Hose Routing

[Wibble]

For what it's worth, this is actually the standard setup in Japan. Here, the octopus runs out the left side. People install their drysuit inflator on the right side, routed under the right arm.

That sounds like a BSAC configuration with the octopus "upside down" for someone else to "take" it from you.

The longhose and short necklaced backup is for doing a "primary donate" where the diver removes the primary regulator from their mouth, over their head and pushes the regulator into the face of the out of gas diver whilst scooping up the necklaced backup and breathing from that.

Very different procedures

 

[eelnoraa]

That sounds like a BSAC configuration with the octopus "upside down" for someone else to "take" it from you.

Wow this doesn’t make sense at all. What if your primary 2nd has issue, you need to use your own octo?

 

[Wibble]

That's why I grabbed one of the angled regulator couplings. I chose a fixed 30 degree to relieve that twist and picked a fixed one because I don't want a swivel to be a point of failure.

You normally don’t need an elbow adapter for a necklaced backmount backup. However that is more common with sidemount.

 

[RobPNW]

Most regulators you see will perform good. Mk25/19/17, AA, AL, hog, deep6... for beginners, I think It is more important to have model that can be serviced locally. I am not sure mk19 is one of them. This is officially not available in US. What other reg choice are you considering?

All single tank valve is on the right side behind diver’s head. The only left valve I am aware of is from the left post of the double manifold. If you happen to come across one, definitely use it. It is uncommon for single tank

I was looking at the MK19 and MK17. With single tank and two hoses on each side, I'm not sure the swivel will make a huge difference. I'm used to rental stuff, so all this gear is better than what I've used already.

 

[Wibble]

Wow this doesn’t make sense at all. What is your primary 2nd has issue, you need to use your own octo?

Yes. Exactly.

The BSAC people seem to use it though. They were vociferously opposed to the longhose configuration for years, only allowing it five or so years ago.

 

[RobPNW]

On the long primary hose, do you guy use a little bungee on your right side to keep it from getting to floaty off to the right?

 

[Wibble]

I was looking at the MK19 and MK17. With single tank and two hoses on each side, I'm not sure the swivel will make a huge difference. I'm used to rental stuff, so all this gear is better than what I've used already.

As per that excellent colour-coded hose picture posted by @marsh9077 above, there’s 4 low pressure hoses, two to the regulators over the right shoulder, then one to the BCD over the left shoulder with an optional hose for the drysuit hose, also routed left.

The high pressure goes to the pressure gauge goes left and clips to the left-hand waist D-ring

 

[eelnoraa]

I was looking at the MK19 and MK17. Was single tank and two hoses on each side, I'm not sure the swivel will make a huge difference. I'm used to rental stuff, so all this gear is better than what I've used already.

I use mk25 and AA, so both with 1st stage turret. My experience is for single tank, The turret doesn’t really do anything because the position is more or less fixed by LPI.

The 5th port is more beneficial in mk25 because the 1st stage stick out further (which is a bad thing). With AA, which is closer to the tank, the hose out of 5th port is band by the tank crowns. My single reg is AA, and I don’t use 5th port for this reason. So my opinion is the turret and 5th port doesn’t matter for single tank. I don’t go out of my way to get it.

 

[Wibble]

On the long primary hose, do you guy use a little bungee on your right side to keep it from getting to floaty off to the right?

It’s normally hooked under a waistband mounted battery or is tucked into the waistband.

 

[Wibble]

I use mk25 and AA, so both with 1st stage turret. My experience is for single tank, The turret doesn’t really do anything because the position is more or less fixed by LPI.

The 5th port is more beneficial in mk25 because the 1st stage stick out further (which is a bad thing). With AA, which is closer to the tank, the hose out of 5th port is band by the tank crowns. My single reg is AA, and I don’t use 5th port for this reason. So my opinion is the turret and 5th port doesn’t matter for single tank. I don’t go out of my way to get it.

On a single cylinder you don’t use the fifth port. You would on a twinset or sidemount configuration