Hollis Air Spool Metal Gauges
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 Air Spool Metal Gauges is backordered and will ship as soon as it is back in stock.
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Product Information
The Hollis Air Spool Metal Gauges is a metal air spool listed by Hollis under part number 204.2310.S, sold as a spare part for pressure gauges. It is the small metal fitting used to connect a submersible pressure gauge to its high pressure hose, and Hollis catalogs it under Instruments on hollis.com and under Products > Spare Parts > Pressure Gauges on the official Hollis Rebreathers site.
Who it is for
This is a part for divers and technicians who assemble or service submersible pressure gauges rather than a standalone piece of dive gear. Typical uses are gauge assembly and gauge service work, where the air spool is the component that sits between the SPG body and the hose.
Key details
- Metal air spool; Hollis publishes no size, thread or variant options for this part.
- Hollis part number 204.2310.S, UPC 020545208891.
- Function: connects a submersible pressure gauge to its high pressure hose.
- Hollis classifies it as a pressure gauge spare part.
- Hollis publishes a California Proposition 65 warning for this item stating it can expose you to methyl isocyanate, which is known to the state of California to cause birth defects or other reproductive harm.
Compatibility and sizing
Hollis lists this spool under pressure gauge spare parts but does not name specific gauge or hose models, and does not publish thread sizes, dimensions or o-ring specifications on its product page. If you are matching it to a particular gauge or hose, confirm the fitting with us before ordering rather than assuming a thread size.
DiveCatalog.com is an authorized Hollis dealer and a real dive shop in Irvine, California since 2003. Call 888-701-4017 or start a chat and we will help you confirm fit or compatibility for your gauge and hose.
- Metal air spool for use with pressure gauges, as named by Hollis.
- Gauge to hose connection joins a submersible pressure gauge to its high pressure hose.
- Factory spare part listed by Hollis under Products > Spare Parts > Pressure Gauges on the official Hollis Rebreathers site.
- Instruments category on hollis.com, grouped with Hollis gauge and instrument products.
- Service and assembly use for gauge assembly and gauge service work.
- Hollis part number 204.2310.S for straightforward reordering.
- UPC 020545208891.
- Single configuration with no alternate sizes or thread options published by Hollis.
- Proposition 65 notice published by Hollis: this product can expose you to methyl isocyanate, known to the state of California to cause birth defects or other reproductive harm.
| Brand | Hollis |
| Product Name | Air Spool Metal Gauges |
| Product Type | Air spool for gauges |
| Material | Metal (no alloy specified by Hollis) |
| Function | Connects an SPG to its high pressure hose |
| Use | Gauge assembly and service |
| Hollis Part Number / SKU | 204.2310.S |
| UPC | 020545208891 |
| Category (hollis.com) | Instruments |
| Category (hollisrebreathers.com) | Products > Spare Parts > Pressure Gauges |
| Thread Size / Dimensions | Not published by the manufacturer |
| California Proposition 65 | Warning published by Hollis: can expose you to methyl isocyanate |
⚠️ 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 does an air spool do on a pressure gauge?
It is the small metal fitting that connects a submersible pressure gauge to its high pressure hose. Hollis lists the Air Spool Metal Gauges as a pressure gauge spare part, and it is used during gauge assembly and gauge service rather than as a standalone instrument. Hollis does not publish thread sizes or dimensions for this part, so confirm the fitting for your specific gauge and hose before ordering.
What is the Hollis part number for this air spool?
The Hollis part number is 204.2310.S and the UPC is 020545208891. Hollis lists it under Instruments on hollis.com and under Products, Spare Parts, Pressure Gauges on the official Hollis Rebreathers site. Quoting the part number is the most reliable way to order or reorder the correct spool, since Hollis publishes no alternate sizes or variants for this item.
Does it come with o-rings or any other parts?
Hollis does not publish a box contents list for this item, so we cannot confirm that o-rings or additional hardware are included. Hollis publishes no box contents or quantity for this item; it is listed under SKU 204.2310.S. If your gauge rebuild also needs o-rings or other service components, call our Irvine, California shop at 888-701-4017 and we will help you identify what else you need.
Will this air spool fit my gauge and hose?
Hollis lists it under pressure gauge spare parts but does not name compatible gauge or hose models, and does not publish thread specifications on its product page. That means fit cannot be confirmed from the manufacturer listing alone. Contact us with your gauge model and hose type before ordering and we will check the fitting with you so you get the right part.
