Refilling the HEED 3

Dial Gauge: Shows actual pressure in psi.


HEED 3 is a refillable, fully self-contained breathing device. Models 175-001 and 300-001 come with an always-on regulator that is always ready to deliver live-saving air in an underwater emergency or toxic air environment. Model 175-003 with flexible hose requires a quick twist to turn on the air supply. Included with every HEED 3 is a Dial Gauge Pressure Indicator to give users the ability to quickly read the available air pressure.

HEED 3 should be stored full or with some positive pressure to prevent contaminants from entering the cylinder. Store in a clean, dry environment with optimum temperatures of 50-75ºF for best product performance. Avoid direct sunlight, automobile trunks or other areas subject to temperature extremes. Industry guidelines recommend replacing air in cylinders annually.

There are 4 easy methods for refilling HEED 3:


Refilling from

HEED 3 can be filled using the SCUBA tank refill adapter attached to a filled 3000 psi SCUBA tank.

Thread the 910S Tank Refill Adapter onto the check valve port of your HEED 3. SCUBA tank must be full in order to completely fill HEED 3.
Place the refill adapter onto a filled SCUBA Tank. Slowly open the tank valve to allow the pressure to equalize, filling your HEED 3.

Refilling at a
Local Dive Shop

The HEED 3 can be filled at any local SCUBA Diving Shops using the optional air compressor refill adapter.

Thread the 920C Air Compressor Refill Adapter onto the check valve port of your HEED 3.
Attach the compressor whip to the refill adapter. Release air into HEED 3 to 3000 psi.

Refilling from a personal
Breathing Air Compressor

If you have several HEED 3s to refill on a regular basis, a Nuvair Breathing Air Compressor may be your best option.

Thread the 920C Air Compressor Refill Adapter onto the check valve port of your HEED 3.
Connect the adapter to the air compressor yoke and turn the compressor on, filling the unit to 3000 psi.

Refilling from
a Hand Pump

Our Custom Hand Pump includes 2 additional necessary adapters. Attach hand pump refill adapter to Spare Air . 
Attach hand pump quick connect adapter to hand pump refill adapter and pump Spare Air up to 3000 psi.

Note: if the unit is completely emptied of air in any underwater conditions, refer to the manual regarding proper servicing before refilling your HEED 3.

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