How to configure your first and second stage on your DIR regulator system for a twinset.

[@Fl4v_]

I am giving twinset diving a go, and you cannot believe how useful you videos have been, thank you, keep it up!

[@meumeuprod]

Thank you very much from France ! I am instructor usually diving with regular configuration (2 first stage but with octopus etc), but as I am intending to go for tek instructor course, I switched back to twinset and purchased a set at Tecline Your video helped me a lot !

[@UTD_ScubaDiving]

Glad it helped. We are always looking for new instructors. sned me an email if you like more information on this ? [e-mail]

[@wallacesify]

Thanks for a great video, love how you explain everything so clearly. Just staring out on the twinset route, more for the redundancy aspects than going down the Tec route (yet!) and all your vids have expained the 'dark art' really clearly so thanks.

[@davidmillar7594]

Thanks. Crisp, easy to follow. Liked the tips.

[@roelandvanderee6157]

Great video, I always like the way you explain things in a very clear and understandable manner. Keep them good videos coming, they are much appreciated

[@UTD_ScubaDiving]

Much appreciated!

[@td5632]

Thanks for your videos and explanation. Especially if you have this absolute nice diving site in the back ground :)

[@christianherbold4143]

Thank you very much from Germany 👌

[@mustanggun]

At the end when you talked about when we dump gas, I had my left loop catch on the inflator hose device and pop off. It can happen, not fun.

[@saifmohamedalshehhi703]

Thank you for a good video and explanation

[@alexbeis1861]

I actually disconnected my LP inflator exactly the way you showed in the video...

[@willibordus]

Thanks for the video, very informative… And after the videoing, you have to pick up again that hose protector 😅

[@UTD_ScubaDiving]

You bet

[@JURASSICCOASTMODELLER]

Great video and very helpful. Will you be doing sidemount next?

[@UTD_ScubaDiving]

Yes that is coming up soon

[@JURASSICCOASTMODELLER]

@@UTD_ScubaDiving Awesome!

[@scubaclient355]

I have disassembled a MK25 turret and didn't notice anything different with the ports. The MK17 configures better on doubles. How would you configure the MK25 if you use double-bladder wings? The MK25 is perfect for sidemount and singles.

[@UTD_ScubaDiving]

Hi, I agree the ports all look the same, but when you read the manual it clearly states that the top port is a high flow port. This also makes sense, because it is directly in line with the position. The New MK17evo is also a very good 1st stage. However I think the hoses are a bit more bent, especially when you inflate your wing fully. We don't use double bladder wings. We don't see the risk outweiging the advantage. If you dive a balanced rig that is.

[@alvarosilva7899]

Great video!!!

[@ProjectChimera-46]

One of the most important parts of this video begins at 6:50 👍🏽

[@eddieadie8953]

I'm quite new to twinset diving, so very interested to see your setup; especially the right post. I've never seen anyone else with that setup, are you a 'trailblazer', or is this quite common? I'll certainly give it a go, but fully expect to get a few comments from more experienced divers

[@UTD_ScubaDiving]

Eddie Adie, thanks for your question! The setup is quite standard and used by most when it comes to what gets fed, by what regulator. The thing I do different than most, is where the longhose comes from on this particular first stage design. And I take it, that is what you are referring to. Like I said in the video. I followed the instructions and did not want to put a wing inflator on my ”high flow port”, that's it. So in my mind it makes sense to have the long hose on the port with the highest flow. Makes more sense because that's the one I am breathing from and donating from. Also it would be a lot easier to deal with a regulator free flow than a auto inflate of my wing. If something were to happen with the first stage.

[@justinloos1286]

Hi, what’s the reason you choose a piston over a diaphragm?

[@UTD_ScubaDiving]

Justin Loos in this case mostly because of the configuration of the hoses. There are some other reasons why I use a piston on stages or deco cylinders. But that may be a topic for another video

[@bloodymarvelous4790]

Interesting that you put the long hose on the fifth port. This is my configuration: Right post: Long hose on a right LP port. BCD inflator hose on the fifth port. Transmitter on the right HP port. Left post: Short hose on the fifth port. Drysuit inflator hose on a left LP port. SPG on the left HP port.

[@UTD_ScubaDiving]

The 5th port is the high flow port as described in the Scubapro / Halcyon manual. They advise against putting a lower grade second stage on that port. The inflator button is mearly a piston with two small o-rings. If I get a sudden strong IP rise, I would rather my longhose started free flowing than my BC. At least that won’t affect my buoyancy ;-)

[@bloodymarvelous4790]

@@UTD_ScubaDiving Fair enough. I run Apeks MTX regulators, and they don't make any distinctions between the LP ports.

[@hummaid1]

In case iam using wetsuit, Is it same configuration?

[@UTD_ScubaDiving]

Yes, just ne carefull the set is not too heavy. Usually just the weight of the gas is to much. I will post a video on the reason for our wings ? There that will be explained. But if the weight of the gas with full cylinders exceeds the positive buoyancy of your wet suit and the wing fails you are stuck.

[@harambeexpress]

If you take the LP plugs out and look inside the first stage you will see that they're all just ports into the same chamber. We also know that gas pressure within a closed system is constant throughout the system . I really don't think it will make any difference if high pressure breaks into the low pressure system - it's going to put the same pressure on all the ports evenly. The initial direction of the gas particles isn't going to matter - and they would lose their velocity as they bouce off the walls of the hose anyway so really total pressure of the system is the only thing that actually matters.

[@jhthrane69]

I like your videos thx👍 which wing will you recommend for 2x12? What du you think about OMS wing with bungee cord?

[@UTD_ScubaDiving]

Jens-Henrik Thrane Hi thanks for the comment. When you say 2x12 I assume steel cylinders. In that case my personal preference is to use a doughnuts wing, single bladder. With approx 22kg of lift. you don't want to go too big because that make the wing wider and harder to control the air bubble ( from left to right) To small and it will not have adequate lift to float your set at the surface. 2x12 near empty -10kg under water Backplate -2,5kg under water Regs -3kg under water Light canister -1,5kg under water Some weight -3kg under water This makes Total -20kg give or take. So a wing with about that should be good. Regarding the OMS Bungee wings. OMS Makes good quality products. And many years ago I used to own a red bungeed wing from OMS. My opinion is that the bungees do not offer any benefit. In fact I think they are a disadvantage when it comes to drag and when it comes to dealing with wing failures. Also the bungees create small pockets of air that make dumping small amount tricky. But hé that's just my opinion. Many divers love them. I just don't. Hope you find the wing you are looking for. But always remember our equipment are our tools. The tools are only as good as the master wielding them.

[@jhthrane69]

@@UTD_ScubaDiving thanks a lot i really appreciate, that in depth answer!

[@agarcia5558]

Hi Ben! First of all, thank you for this helpful video and, in general, for all the videos offered in the UTD youtube channel I have a question about the O2 compatible lube. Is it really necessary to be O2 compatible or it would be enough with a "normal" lube? I mean, I understand that the twinset is oriented to bottom gas, and the percentage of O2 in this gas will be probably under 50%. What would be the advantage of using 02 compatible lube?

[@UTD_ScubaDiving]

Hi A, Verry good question. And you are right to ask it. But here is why I would recommend using a hydro-carbon-free lubricant for all my connections with dynamic o-rings ( o-rings that move ) A: Even though the back gas twinset or single tank most like will never have an oxygen content of above 32% Oxygen, The filling procedure might involve putting pure Oxygen into your cylinder first for later topping off with Air, Thus all parts need to be oxygen compatible and clean. So depending on the mixing method it's a good idea to use it and be sure. B: This type of lube ( Christo-Lube or other brands like the Oil from Narked@90) has a wider usable range when it comes to temperature fluctuations than IE silicone grease. Meaning it does not get as stiff and sticky in cold conditions and very fluid in warm conditions. I personally only use silicone grease for dynamic o-rings in light's and camera's all other stuff like regulators CCR loop hoses or similar I use Christo-Lube or the oil from narked@90 Hope this answered your question.

[@agarcia5558]

@@UTD_ScubaDiving Hi again Ben. Thank you very much for your complete and well-argued response! I totally agree with the reasons exposed

[@albertokusmic9239]

You might be swapping, for many reasons, the SPG from the twinset to a deco bottle (50%, pure Oxy..). With an O2 compatible product you will have the max usability range

[@RB-xv4si]

Brand neutral..ok. Everything in the video was Halcyon! Haha

[@bloodymarvelous4790]

You can still be brand neutral and have everything from one manufacturer. My setup happens to be mostly Apeks (BP&W and regs), but I absolutely love the ScubaPro Mk25 and the Mares Abyss 52x. In the end you have to pick a BCD and a reg. You can't have a Halcyon reg and a ScubaPro reg, and an Atomic Aquatics reg on your kit. You also can't have an XDeep and an Apeks wing at the same time. Sometimes they just happen to be the same brand. I happened to be able to get my hands on Apeks MTX regulators, and I love the Armorguard shell of their PSD wings. But I seriously considered the G260/Mk25 ScubaPro and Mares Abyss regulators, and the XDeep Zen Standard BP&W.

[@anko6999]

shity setup 1st stages

[@africantwin173]

What would you recommend that is easy to service an affordable. Everybody is diving Apeks in my area.

[@anko6999]

@@africantwin173 i meant how he set up 1st stages , u can see this at 28:45 Apeks is ok i think, im using it as well

[@bloodymarvelous4790]

@@anko6999 The long hose and the inflator hose are going to be at a 90° angle whichever way you set them up.He just swapped them around and turned the first stage 90° so the hoses still route as normal. I see no issue with it. It may not be standard, but it works fine. Me personally I would have the long hose on the 5th port of the left first stage, and the LPI on the 5th port of the right 1st stage, but I see his reasoning. The main point is that you have one LPI and one regulator on each first stage for redundancy, and his setup fully complies with that principle.

[@Allheadingtosameplace]

Love how it’s all halcyon brand

[@미친태국남자]

Why in-place terhose Is not connecting to 5port? Can't we change the long hose and inflator hose?

[@미친태국남자]

I'm curious.

[@benbos1925]

@@미친태국남자 the answer is given @ 22:25 in the video ;-)