Hollis Large Pony Compact Bottle Gauge
In stock — ships from Irvine, CA
This item is currently on backorder. Order now to reserve yours, and we will ship it as soon as it is back in stock.
Hollis Large Pony Compact Bottle Gauge - PSI is backordered and will ship as soon as it is back in stock.
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Product Information
The Hollis Large Pony Compact Bottle Gauge is a small, direct-mount pressure gauge that threads into the 7/16" high-pressure port of a pony bottle regulator or other alternate tank regulator, eliminating the need for a standard hosed pressure gauge. It displays remaining tank pressure in large numerals with colored indicators and is Nitrox compatible to 100% O2.
Who it is for
This gauge suits divers who carry a pony bottle or other alternate air source and want a compact, direct-reading way to monitor pressure without adding a hose to their rig. Because it mounts straight to the first stage's HP port, it keeps the setup streamlined for backup or alternate air supplies.
Key details
- Mounts directly to the first stage HP port, so no hose is required.
- Large numerals with colored indicators make pressure easy to read at a glance.
- Fitted with an HP O-ring and ready to install out of the box.
- Rated Nitrox compatible to 100% O2.
- Sold as a compact, small-design gauge built for pony bottle and alternate tank use.
Compatibility and sizing
The gauge is offered in two measurement-unit variants: SKU 204.2317 reads in PSI and SKU 204.2318 reads in BAR. Both connect to the same 7/16" HP port found on a pony bottle regulator or other alternate tank regulator first stage.
DiveCatalog.com is an authorized Hollis 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 or compatibility with your specific regulator before you order.
- Eliminates a standard hosed gauge: mounts directly to the HP port so no pressure hose is needed.
- Compact design: small footprint suited to pony bottles and alternate air sources.
- Easy-to-read display: large numerals with colored indicators for quick pressure checks.
- Ready to install: equipped with an HP O-ring out of the box.
- Nitrox compatible: rated for use with gas mixes up to 100% O2.
- Selectable measurement units: available in PSI (SKU 204.2317) or BAR (SKU 204.2318).
| Brand | Hollis |
| Product Type | Compact pony bottle gauge |
| Category | Instrument Accessories |
| Mounting | Direct to the first stage HP port, no hose required |
| Display | Large numerals with colored indicators |
| Fittings | HP O-ring fitted, ready to install |
| Gas Compatibility | Nitrox to 100% O2 |
| Unit Options | BAR or PSI (selectable) |
| SKU (PSI) | 204.2317 |
| SKU (BAR) | 204.2318 |
| Barcode (PSI) | 020545204541 |
| Barcode (BAR) | 020545204558 |
| MPN | 204.2318 |
⚠️ 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
What is the difference between the PSI and BAR versions of this gauge?
The two versions read pressure in different units for the same gauge design. SKU 204.2317 displays pressure in PSI, while SKU 204.2318 displays pressure in BAR. Both mount the same way to a 7/16" HP port, so choose whichever unit matches how you prefer to monitor tank pressure.
Does this gauge require a hose to install?
No, the Hollis Large Pony Compact Bottle Gauge mounts directly to the 7/16" high-pressure port of a pony bottle regulator or other alternate tank regulator first stage. This eliminates the need for a standard hosed pressure gauge, keeping the setup compact.
Can I use this gauge with Nitrox?
Yes, the gauge is Nitrox compatible to 100% O2, so it can be used on pony bottles or alternate tanks filled with air or Nitrox blends.
Is this gauge ready to install right out of the box?
Yes, it comes equipped with an HP O-ring already fitted, so it is ready to thread into a compatible 7/16" HP port without needing to source additional fittings or seals.
