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Pretty sure its basically a home made compressor using two low volume/high pressure aircraft pumps. I can't ready the filter tower, what size/make/model filter is in it?

So when 2 divers up with 18/45 and 21/25 for a 150 dive do they just buddy up casually too? Where does this slippery slope end? Part of making a deco dive <PLAN> is ensuring you're both doing the same dive and here we have 2 divers deviating from one of the basics before they even get to...

100s are fine. The 108s are beasts

And you all keep going on about janky work arounds instead of just saying "nah not diving today". That's what both should do about it instead of asking strangers on the internet. It's a sloppy slippery slope which they already started with this purported 'plan'

Yes you posted in the wrong forum. Consistent team gas choices are a "before you leave the dock" requirement. Also air is not used, especially for a 100ft deco dive.

not ideal but a good first step

Make the spacer integral with the scrubber. All canisters are matched with only one scrubber using a key-lock system, flanges or integral tabs that only fit one way.

The diluent was likely emptied by the diver trying to flush the loop or the loop volume crashing due to extremely high respirations firing the ADV. It's a consequence of the CO2 breakthrough, not a cause. The fact that the make & model of CCR isn't identified is problematic. It's entirely...

Just buy them new from a proper reputable supplier with viton rings. If you really want, for tiny hard to work with parts like this, you can use a one-step degreasing process like an 90% + isopropyl alcohol wash followed by forcing clean air through them to dry. But that isn't really necessary...

Same weight LP45s, 50s, 85s,

How many dives are you planning? Renting or borrowing a couple extra tanks for your weekend might save you a bunch of pointless driving There are a couple shops in the Idaho Falls area 2 hrs west. The next closest would be Rock Springs, about 3 hrs south. After that you're wayyyyy TF up in...

The SP and DGX assemblies are the same threading and work interchangeably in my lone SP valve. I don't know when that SP was made though and it's in theory possible your threads are different than mine. The SP disk is going off the metric bar pressure rating which is 182 bar * 5/3rds = 305 bar...

Way to read the room @Nemrod

That is exactly what @Tracy 's system is doing. The pump itself is just super slow (100 liter per hour) so you are looking at ~12 hours to fill a 40 with o2 from empty. More concentrators can't change that rate since they just feed the compressor.

Completed it with the understanding this is for a BA level degree not an especially sophisticated peer reviewed publication. There are some oddly duplicative questions near the end and could use some editing to avoid things like double negatives. Also the gender question was (surprisingly)...

As long as it's salt. For freshwater lp85s pretty bomb with thick wetsuits. And Al80s are great in fresh too

It's the cable moreso than the connector. The EO is a standard and unfortunately the only place to get the thin cable version is LM. You can find the thick cable version (which won't work in the heater port) on alibaba for cheap. 100 dives is their rough lifespan.

No drysuit is going to be adequate for 90min dives in those temps. You'll need external heat for longer dives. But you also won't be on the bottom in 40F temps all that time either. So for the typical summer boat dive season you can do ok in a Halo, BZ400 or weezle extreme (no plus) without any...

Which lake? Cause Lake Erie is a heck of a lot warmer than Lake Superior lol. Weezle Extreme+ and external heat is the minimum for Lake Superior which is only warm at all fairly shallow.

They are basically just heavier Al80s for 1) the same amount of gas and 2) you can move that weight around as its fixed on the tank bottom. Use a weight pouch on the cam bands to accomplish the same thing and also give you options to move it around to optimize trim