Spare Air 300PK-DG Package with Dial Gauge
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This item is currently on backorder. Order now to reserve yours, and we will ship it as soon as it is back in stock.
Spare Air 300PK-DG Package with Dial Gauge is backordered and will ship as soon as it is back in stock.
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Product Information
The Spare Air 300PK-DG Package with Dial Gauge is a 3 cu ft / 85 liter emergency air cylinder built as a fully redundant miniature backup system for scuba divers, pairing a balanced single-stage regulator with an added Dial Gauge for quick air monitoring, and it is rated to a service pressure of 3000 psi / 207 bar.
Who it is for
This package suits divers who want a dedicated reserve of breathable air for an out-of-air emergency. Its small size and light weight make it a practical addition for divers who want extra peace of mind clipped to their gear without adding bulk.
Key details
- Cylinder capacity: 3 cu ft / 85 liters of air, with a water capacity of 30 cu in / 0.5 liters.
- Service pressure: 3000 psi / 207 bar maximum.
- Dimensions: 13 in / 33 cm long, 2.5 in / 6.4 cm in diameter.
- Weight: about 2.2 lb / 1 kg.
- Material: aluminum cylinder with a black anodized finish for saltwater durability.
- Regulator: balanced single-stage design for breathe-on-demand delivery.
- Surface breaths: approximately 57, based on 1.5 liters per breath.
- Origin: made in the USA.
Compatibility and sizing
The cylinder refills from any full SCUBA tank using the included Refill Adapter, so it stays ready between dives without a separate compressor trip. The manufacturer states the Dial Gauge upgrade included in this package is designed to work across Spare Air models.
What's in the box
- 3 cu ft Spare Air cylinder with balanced single-stage regulator
- Dial Gauge for monitoring remaining air
- Holster with quick disconnect straps and mouthpiece cover
- Safety Leash
- Refill Adapter
- Printed Owner's Manual
DiveCatalog.com is an authorized Spare Air dealer and a dive shop in Irvine, California, serving divers since 2003. Call 888-701-4017 or chat with us if you have questions about fit, refilling, or compatibility with your current gear.
- Capacity: 3 cu ft / 85 liters of air with a water volume of 30 cu in / 0.5 liters.
- Pressure rating: 3000 psi / 207 bar maximum service pressure.
- Dial Gauge included: package adds a Dial Gauge for easy monitoring of remaining air.
- Regulator: balanced single-stage, breathe-on-demand design with no complicated instructions.
- Backup redundancy: serves as a fully redundant miniature SCUBA backup system.
- Refillable: refills in seconds from any full SCUBA tank using the included Refill Adapter.
- Dimensions: 13 in / 33 cm long, 2.5 in / 6.4 cm in diameter.
- Weight: about 2.2 lb / 1 kg when full.
- Material: aluminum cylinder with a black anodized finish for saltwater durability.
- Surface breaths: approximately 57, based on 1.5 liters per breath.
- Made in USA: manufactured domestically by Spare Air.
| Cylinder Capacity | 3 cu ft / 85 liters |
| Water Capacity | 30 cu in / 0.5 liters |
| Service Pressure | 3000 psi / 207 bar |
| Length | 13 in / 33 cm |
| Diameter | 2.5 in / 6.4 cm |
| Weight (full) | 2.2 lb / 1 kg |
| Cylinder Material | Aluminum, Black Anodized |
| Regulator Type | Balanced Single Stage |
| Surface Breaths | 57 (based on 1.5 liters per breath) |
| Country of Manufacture | Made in USA |
| Manufacturer Part Number | 300PK (base package; this listing is the 300PK-DG package with Dial Gauge upgrade) |
- 3 cu ft Spare Air cylinder with balanced single-stage regulator
- Dial Gauge for monitoring remaining air
- Holster with quick disconnect straps and mouthpiece cover
- Safety Leash
- Refill Adapter
- Printed Owner's Manual
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
How many breaths does the Spare Air 300 provide?
The Spare Air 300 package delivers approximately 57 surface breaths, based on an estimate of 1.5 liters of air per breath. Actual breath count will be lower at depth because air is consumed faster under increased ambient pressure, so this figure is intended as a surface reference rather than a dive-time guarantee.
Can I refill my Spare Air myself between dives?
Yes, the 300PK-DG package includes a Refill Adapter that lets you refill the cylinder in seconds directly from any full SCUBA tank. No separate compressor or shop visit is required, which makes it practical to top off between dives on a boat or at the dive site.
What does the Dial Gauge add compared to the standard Spare Air package?</br>
The Dial Gauge gives you a visual readout of remaining air on the cylinder itself, rather than relying on an estimated breath count. Spare Air states the Dial Gauge upgrade works across its model lineup, and this package pairs it with the 3 cu ft cylinder.
Is Spare Air meant to replace a pony bottle or primary scuba tank?
No. Spare Air is designed as a fully redundant miniature SCUBA backup system for emergencies, not as your primary air supply. Its 3 cu ft / 85 liter capacity provides approximately 57 surface breaths, based on 1.5 liters per breath.
