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1st Stage

Where - Joints and holes of the 1st stage

What - Occasional bubbles or fine stream of bubbles

Why - General wear & tear or badly adjusted

How - Send to a service technician

Dive - Depends on comfort, unlikely to get worse, but does need attention!

Where - Between the tank valve and 1st stage yoke 

What - Occasional bubbles or stream of bubbles

Why - Damaged o-ring, or damaged yoke seat

How - Replace o-ring, or send to a service technician

Dive - Depends on comfort, could burst underwater!

2nd Stage

Where - Second stage exhaust

What - Occasional bubbles or a constant stream of bubbles

Why -Intermediate pressure too high or cracking pressure too low

How - Turn back second stage adjustment (if present), get regulator serviced asap

Dive- Depends on comfort, can affect air consumption!

Where - Second stage exhaust

What - Occasional bubbles or a constant stream of bubbles

Why - Sand/grit or corrosion in the 2nd stage seat

How - Move the 2nd stage through the water while pressing the purge button, to dislodge contamination

Dive - If ‘How’ doesn’t work, advisable to abort the dive. Can affect air consumption

SPG/Console

Where - Between hose and SPG

What - Occasional bubbles or a constant stream of bubbles

Why - Damage to spool or spool o-rings

How - Replace spool or o-rings, and grease

Dive - Depends on comfort, can affect air consumption! 

Hose

Where - Either end of a hose

What- Occasional bubbles or fine stream of bubbles

Why - Dirty or damaged o-ring, or loose connector

How - Clean/replace & grease o-ring or tighten connector

Dive- Depends on comfort, high-pressure hose leak is minor, low-pressure hose leak is more serious

Where - Anywhere along with the hose

What - Tiny stream of bubbles

Why - Weak area inside the hose, usually due to damage/constant flexing

How - Replace the hose

Dive - Depends on comfort, high-pressure hose leak is minor, low-pressure hose leak is more serious


BCD

Where - At BCD inflator hose connection

What - Occasional bubbles or a constant stream of bubbles

Why - Damage/worn shredder valve in inflator hose

How - Replace shredder valve or inflator hose

Dive - No significant issue

Where - Around BCD inflator connection/buttons

What - Occasional bubbles or a constant stream of bubbles

Why - Worn/damaged O-rings

How - Send BCD for service

Dive - Can cause deflation on BCD on the surface

Where - Anywhere over the BCD’s surface

What - Fine stream of bubbles

Why - Small holes in the bladder, usually caused by salt crystals or aging

How - Replace bladder/BCD

Dive - Can cause deflation on BCD on the surface

James

RAID Examiner, and director of Diving Solutions (Asia), in Singapore.

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