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Based on the dimensions or? Scott rebranded Luxfers were mostly the 7/8" UNF necks. It's (remotely) possible they are 3/4" NPS or even some other thread though.

They are thin wall & high water capacity, so super buoyant. Thus, not really desirable as scuba tanks. The necks are mostly likely 7/8"x14 UNF so the same valves as an old exemption series steel tank. Those will be 300 bar DIN and super annoying. They are probably 45cf - so small, buoyant...

Deco efficiency is not the purpose of the 20ft flushes

I usually use my flush muffs for about 12-15mins in the driveway since I only have access to cold water. The flush port won't open the thermostats - while starting up and running it gets the whole innards warm to hopefully dissolve more salts. The salt away (I still have like 1/2 a gallon) is...

Salt Away is advertised for the purpose of motor flushing but I have no idea how well it works relative to other descalers. I've only done it perhaps twice in 300 engine hours. I use a large rubbermaid tub and then catch the telltale stream in a 5 gallon bucket off to the side and pour that...

You're not doing anything wrong. To really get all the way up to 1.6 at 20ft takes a serious effort, lots & lots of O2 (to basically dry out the loop), and some breath holding. It's usually do-able in a cave. Midwater forget it.

Your questions were answered - multiple times. Do you internet much? Because this was 3 clicks deep on the DAN insurance website. Compare plans > USA > Florida Two clicks deep at Dive Assure

My god this is a nasty. What descaler are you using? I've used a giant bucket of salt-away in the past, but I only have a 60hp Yam. Edit ok finally got your link to work McMaster-Carr Have you had any issues with this removing paint or other damage?

Since you hate DAN so much, and spending more time and energy ranting here than researching your insurance options, just look at a different insurer. Here's an example, be sure to click the button *on the right* for policies written in FL. https://diveassure.com/en/diving-insurance/

Which part is stuck? The washer is usually plastic and you can spear it with a dental pick. The copper disk itself (if stuck) is best removed by putting the valve on a tank with a towel over the disk hole. Pressurize the tank (e.g. with a transfill whip) until the disk ejects into the towel.

Cooper is a tire manufacturer and they make other natural and synthetic rubber products as well. They are not a taxpayer funded project or program. But you seem to just be here to argue that they are the bees knees. No matter what you say, they remain labeled "not for underwater use" Carry on...

Membership and DAN insurance are two separate and distinct things. The USCG does not charge for evacuations absent some particularly egregious incompetence. They also dont generally do helicopter evacuations for DCS either. But yes the higher level DAN insurance covers medically necessary...

Huh? What are you talking about? The Cooper CCR hoses are labeled "Not for underwater use". That's it. There is nothing on them about use as breathing hoses or not. At least one (yes competing) CCR manufacturer (ISC) building for the Navy has claimed they were never tested in breathing...

The unknown issue with new Coopers is the off-gassing of not so healthy vapors. The issue with older Coopers is the wire rusting out and the hose collapsing.

Also I am not sure where you got the impression that DoD or the Navy are bastions of "fit for purpose" or health & safety or otherwise. They do all kinds of dubious stuff when it suits their operational needs. Everything from Agent Orange, AFFF PFAS firefighting foams, to Iraqi burn pits, and...

Because they say "not for underwater use" on them?

The limestone is heavily metamorphosed into a dark marble with some igneous intrusions (which are often magnetic which sucks). Much of the bedding plane is vertical or at the very least radically tilted. Depths vary A LOT. Some of the short shallow systems might only be 10m long and 1m deep...

There are quite a few (~350-400) wrecks down to 300ft in Puget Sound and Lake Washington in particular. Unfortunately, there are basically no charters going to any of them anymore. And the local knowledge to actually dive them is fading fast. That is an area ripe for "rediscovery" but only if...

I have a 5p7s battery (5000mah cells) in a Sierra and the Smart-DPV is indeed impressive. @Jona Silverstein should be able to answer the specifics on firmware updates

It's a pretty limited universe of instructors. Or you could skip the GUE course and find a FL mentor https://www.gue.com/diver-training/gue-instructors?course=59