ShopAmerex.com · Amerex 09366 datasheet · https://shopamerex.com/products/amerex-09366-brass-shut-off-valve-assembly-50-100-lb-co2-wheeled · Figures as published by Amerex · Verified Sep 2, 2026
Genuine Amerex service part·Part no. 09366
Amerex 09366 Brass Shut-Off Valve Assembly, 50/100 lb CO2 Wheeled
Amerex 09366 is the shut-off valve assembly — the squeeze-grip discharge valve at the horn end of the hose — for the Amerex 333 (50 lb) and 334 (100 lb) carbon dioxide wheeled extinguishers, item 21 on Parts Book printed page 21 (PDF page 23). Full overview ↓
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Which models does the Amerex 09366 fit?
Per the Amerex Parts Book · page 23| Fits | Extinguisher | UL rating | Capacity | Price | Link |
|---|---|---|---|---|---|
| Model 333 |  09330 Amerex 333 50 lb Wheeled CO2 Fire ExtinguisherParts Book printed p.21, item 21 |
20B:C | 50 lb (22.7 kg) | $3,862.00 | View |
| Model 334 |  09331 Amerex 334 100 lb Wheeled CO2 Fire ExtinguisherParts Book printed p.21, item 21 |
20B:C | 100 lb (45.4 kg) | $5,708.00 | View |
Parts list for 50/100 lb. carbon dioxide wheeled models
Fitment per the Amerex Parts Book. Check the part number against your unit’s nameplate before ordering.
What is the Amerex 09366?
Amerex 09366 is the shut-off valve assembly — the squeeze-grip discharge valve at the horn end of the hose — for the Amerex 333 (50 lb) and 334 (100 lb) carbon dioxide wheeled extinguishers, item 21 on Parts Book printed page 21 (PDF page 23). The operator grasps it, aims the horn at the base of the fire and squeezes the lever to discharge; releasing the lever stops the flow. Its valve stem (Amerex 09899) and spring (Amerex 09901) are listed separately for service. The manual calls for checking the lever's freedom of movement yearly. Amerex requires genuine factory parts to protect the UL listing and keep the warranty in effect.
Amerex 09366 specifications
| Part number | 09366 |
|---|---|
| Description | Shut-off Valve Assembly |
| Parts Book page | Printed page 21 (PDF page 23) |
| Diagram item | 21 |
| Models | 333, 334 |
|---|
| Amerex item number | 09366 |
|---|
Part data as published by Amerex. Confirm against the current Parts Book revision before ordering for a unit in service.
Amerex 09366 documents
Official Amerex publications · PDF- Parts Book p. 23 Parts list for 50/100 lb carbon dioxide wheeled models 333, 334 (printed p.21)
- Owner's Service Manual — Models 333/334 Installation, operation, inspection, maintenance and recharge
- Wheeled Fire Extinguisher Catalog 333/334 specification table (printed p.10)
- Tech Tip Why genuine Amerex parts
- Warranty
Current Amerex publications, hosted on ShopAmerex so links do not break when Amerex reorganizes its site.
Other parts on Parts Book page 23
Parts list for 50/100 lb. carbon dioxide wheeled models · All 19 parts| Part no. | Part | Pack | Price | Quantity and add to cart |
|---|---|---|---|---|
| 08169 | Each | $32.99 | ||
| 09364 | Each | $395.00 | ||
| 09369 | Each | $39.99 | ||
| 09545 | Each | $323.00 | ||
| 09618 | Each | $13.99 | ||
| 09623-P001 | Pack of 1 | $193.00 | ||
| 09787 | Each | $21.99 | ||
| 09891 | Each | $1,301.00 |
Item numbers refer to the exploded view on the Parts Book page. Model-specific items are marked in the Amerex parts list; confirm before ordering.
Amerex 09366 questions
What does the Amerex 09366 shut-off valve assembly fit?
The Amerex 333 (50 lb) and 334 (100 lb) carbon dioxide wheeled fire extinguishers.
What does the shut-off valve do?
It is the squeeze-grip discharge valve at the horn end of the hose; squeezing the lever discharges CO2 through the horn, and releasing it stops the discharge.
Where is part 09366 listed in the Amerex Parts Book?
Item 21 on printed page 21 (PDF page 23) of Parts Book 27277 Rev D.
What finish or material does the Amerex 09366 have?
The Parts Book lists it only as “Shut-off Valve Assembly” with no material given; the Amerex wheeled catalog describes the 333/334 squeeze-grip discharge valve as chrome-plated.
Which parts of the shut-off valve are sold separately?
The valve stem assembly (Amerex 09899, item 22), the spring (Amerex 09901, item 23) and the handle with rubber cover (Amerex 09896, item 24).
When should the shut-off valve be serviced?
At annual maintenance the manual has the technician squeeze and release the horn shutoff lever several times; if the operation is impeded, disassemble the nozzle and replace or lubricate parts as necessary.
Does the Amerex 09366 carry its own UL rating?
No — it is a service part. The assembled Amerex 333 and 334 carry a 20B:C UL and ULC rating.
Which extinguishers does Parts Book printed page 21 cover?
The 50/100 lb carbon dioxide wheeled models — the Amerex 333 (50 lb) and the Amerex 334 (100 lb).
Is the Amerex 09366 a genuine Amerex part?
Yes — it is the factory shut-off valve assembly listed in the Amerex Parts Book; Amerex states that substitute parts void the UL listing and the warranty.