HEED 3 - General Servicing Information

NOTE: If a leak or damage is discovered at any point, the unit should be serviced before use. Only qualified, trained technicians should service a HEED 3 using original replacement parts available from Submersible Systems. Units may be sent directly to Submersible Systems for service. Download, print and complete a repair/maintenance form available here.


Pre-Use Check

Before deploying a HEED 3, before a flight, or at the beginning of a shift, the user should perform a pre-use check.

  1. Visually inspect the pressure indicator (dial gauge). Needle must point to area withing green zone. If the unit is under-pressurized, perform an ANNUAL CHECK to determine if the unit is actually leaking or if it simply needs refilling.
  2. Visually inspect the unit for physical damage, such as broken or loose parts. Check opening of diaphragm cover (at the top of single piece units or in the regulator of the hose unit) for presence of foreign objects, debris or punctures in the diaphragm. Check that all parts are clean and securely attached.

Annual Check

At least once a year, a more comprehensive inspection of the unit should be performed to be sure the unit is not leaking (defined as a continuous flow of bubbles at a constant rate).

    Submerge the HEED 3 looking for a continuous flow of bubbles
  1. Be sure the HEED 3 is fully pressurized to 3000 psi.
  2. With clean water fill a container deep enough to completely submerge the HEED 3. Gently place the HEED 3 into the water.
  3. Shake the unit gently back and forth several times while holding underwater to release all the trapped air.
  4. Continue to hold the unit underwater and watch for any leaks for at least 60 seconds. During this time, inspect the mouthpiece opening, side ports and places where tank connects to the regulator for a continuous flow of bubbles.
  5. If the unit is leaking from the tank/regulator connection, release the pressure in the unit by pressing down on the purge button, gently remove the cylinder and inspect the o-ring for cracks or dents. If the o-ring is not damaged, replace the cylinder carefully and hand tighten the regulator to the cylinder. Re-pressurize the HEED 3 and place underwater again. If the unit continues to leak, then the entire unit will need to be serviced.
  6. All other leaks will automatically need to be serviced by a qualified technician or Submersible Systems.
  7. Inspect the cylinder for signs of corrosion, pitting or damage. Any signs of tank damage should be reported to a qualified technician to determine if additional testing is required.

Five Year Service

No matter how often the unit has been used, or even if the unit has not been used at all, the HEED 3 requires tank inspection and regulator overhaul every 5 years.

  1. Only qualified, trained technicians (certified through Submersible Systems) should perform an overhaul.
  2. Most SCUBA shops that perform equipment maintenance are certified to perform overhauls on Spare Air and HEED 3. If a local technician is not available, Submersible Systems can perform the overhaul. Download a repair form and follow the form instructions.
  3. DOT 3AL cylinders REQUIRE hydrostatic testing every five years. DOT requires that any cylinder exposed to fire or heat in excess of 350°F be condemned.
  4. CE cylinders - refer to local country regulations for how often hydrostatic testing is required and heat exposure ratings.

Routine Care and Storage

To keep your HEED 3 in prime working order, follow these tips:

  1. DO NOT immerse or use solvents, acids or other chemical cleaners on your HEED 3. Hot, soapy water may be used for cleaning when necessary.
  2. Corrosion resistant materials are used in all parts of HEED 3. For maximum performance and reliability, after underwater use, fill the unit, then thoroughly rinse in clean, fresh water and air dry before storage, especially when used in salt water or a chlorinated swimming pool.
  3. Store your HEED 3 in a clean, dry environment.
  4. Store your HEED 3 fully pressurized, ready to use, or at least with partial pressure to keep the unit free of contamination and debris.
  5. DO NOT store your HEED 3 in a hot/freezing helicopter, vehicle, boat or airplane while not in operation.

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