12712 Rock Creek Mill Rd., Suite 3A, Rockville, MD 20852

301-881-2831

301-881-2831

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    • Home
    • Classes
      • About our Classes
      • Start Diving - Open Water
      • Specialties and Minis
      • "No Water Needed" Classes
      • Scuba Skills Update
      • Technical Diving
      • Class Registration Info
    • Gear
      • Online Store
      • choosing your gear
      • Brands We Believe In
      • Eco-Conscious Gear
      • Scuba Gear Tips and FAQs
    • Service & Repairs
      • Gas Fills
      • Gear Service Rates
      • Gear Rental Rates
      • About Gear Service
    • Travel
      • Bonaire - July 2022
      • Key Largo - Sep 2022
    • Community
      • Scuba Group
      • Local Diving
      • Staff
      • Reviews
      • Fitness for Scuba
      • Activity Waivers
    • Calendar
    • Contact
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SCUBA and HPA Cylinder Fills

Gas Fills

We offer all sorts of fills at Submerged for recreational and technical divers. Cylinders must have a current hydro (within 5 years), a current visual inspection (within  and divers must be certified for the level of gas they are requesting.


  • Air
  • Nitrox
  • Deco & Rebreather Bottle Fills
  • Trimix
  • HPA for Airsoft & Air Rifles

Air & Nitrox Fill Rates

Air fill <80cf/3000psi

$10

Air fill >80cf/3000psi

$11

nitrox 32% Fill <80c/3000psi

$13

nitrox 32% Fill >80cf/3000psi

$16

Other nitrox mix <40%O2

$20

it's more because it takes time to make it

Drysuit inFlation <9cf cylinder (air only)

$5

Deco Bottle & Rebreather Bottle Fill Rates

oxygen fill

$0.55/cf

nitrox 50%

$0.60/cf

Nitrox 80%

$0.63/cf

rebreather bottle hookup fee

$5.00

for rebreather bottles <30cf

Trimix Fill Rates

If you need a mix other than what is listed below, just ask!

25/25

$0.79/cf

21/35

$1.03/cf

18/45

$1.28/cf

Bank your unused trimix

$5.00

Don't waste that expensive trimix. Bank it at Submerged for a flat fee of $5, refill your cylinders with something else, and redeem your trimix when you need it again. We can save all but 500psi of your trimix. 

HPA for Airsoft & Air Rifles

High Pressure air fills

For non-scuba applications. Cylinders must have a hydrostatic test current within the past 5 years.

HPA fill up to 3000psi

$6

small cylinders, measured in cubic inches

HPA Fill up to 4500psi

$7

small cylinders, measured in cubic inches 

HPA fill for large capacity cylinder

$11

up to 4500psi

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Submerged, Inc.

12712 Rock Creek Mill Rd., Suite 3A, Rockville, MD 20852

301-881-2831

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