A gas loss non-emergency

[Hatul]

No Akimbo, I test to make sure I cannot undo the hose by hand.

To answer my question about size of the fittings, I believe they're are SAE (Imperial inch fractions) not metric, because most scuba tools list SAE size spanners.

 

[nimoh]

Yes these would work, and as you say you have to subtract the distance from the middle of the square hole to the axis of the hose to compensate for the extra length of the lever arm. Do you use metric or SAE wrenches for scuba hoses?

What I've been doing is holding the wrench close to the axis to limit the torque and hand tighten with steady firm pressure until the wrench stops and more. Then I test to see if I can undo the hose by hand.

If memory serves me correctly, I use a 7/16" SAE crowfoot for tightening hoses. However, since the torque being applied is so low, a metric wrench close in size would probably work without significant risk to damaging the hose fitting.

 

[Hatul]

If memory serves me correctly, I use a 7/16" SAE crowfoot for tightening hoses. However, since the torque being applied is so low, a metric wrench close in size would probably work without significant risk to damaging the hose fitting.

True, but if someone is obsessive-compulsive enough to use a torque wrench to tighten hoses, they won't use a metric tool on an SAE fitting.

 

[nimoh]

True, but if someone is compulsive enough to use a torque wrench to tighten hoses, they won't use a metric tool on an SAE fitting.

agreed