Strap Type | Spring $89 - $99


Tech & Tips


Secure your diving tank to BCD in seconds with very little effort and up to 10x (100 kg) more tightening torque than any conventional buckle.  Adjustable screw system makes installation and removal from tank a breeze.  Heavy duty spring automatically adjusts to keep your tank in place and stable.


  • Quick and easy to install on any BCD
  • Adjustable nylon tank strap is 33" long to fit any tank
  • No more struggling  to get the tank strap tight and the buckle clamped down
  • Oversized spring tension knob extends for easy adjustment, even with heavy gloves.  Hinged to flip back and out of the way after adjustment.
  • If using same tank size, just turn the knob a few times to install or remove.  When using multiple tank sizes, TL2 features additional lever for on tank adjustment. Remove from tank to adjust TL Pro.
  • Manual
  • Schematics

What's in the box?  Bio Tank Lock With Strap

Material:  Die Cast Aluminum, POM, SUS 304 and Nylon

Strap:  900 mm x 50 mm, Total Weight:  330 g



1.  Metal buckles move inward during compression. Leave about a pinkie of space 3/8 to 1/2", between buckles to avoid contact stress

2.  Rinse with fresh water. Brush spindle and spring to keep salt and debris from building up and hindering function.

3.   Thread it right.  Knob side, loose end of strap sits inside against tank. Belt locking side (#1 below), the strap hangs loose on outside so you can adjust for various tank sizes while on tank.  Older model tank lock was adjusted before slipping on tank because loose end of strap had to rest against tank to stay secure.


Installing on tank


Step 1:  Place the Bio Tank Lock over the cylinder.

Hold on to the knob #2 and pull the end of belt

towards direction #1






Step 2: Push the belt locking tab #3 down whilst

pulling the loose end of the belt to keep tight.






Step 3: Turn the knob #4, check the spring has

fully compressed and that the space between

the two metal buckles are about 3/8 to 1/2" apart.






Step 4: Slip the end of belt into the belt keeper #5.

Verify that belt buckles can not be moved and

tuck adjustment knob toward tank.





NSN 4220-66-152-0152 Band Assembly, Divers Tank (Bio Tank Lock)

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