ShopAmerex.com · Amerex 03559 datasheet · https://shopamerex.com/products/amerex-03559-air-valve-with-core · Figures as published by Amerex · Verified Sep 2, 2026
Genuine Amerex service part·Part no. 03559
Amerex 03559 Air Valve with Core
Amerex 03559 is the pressure valve for Amerex 125 lb dry chemical stored pressure wheeled High Performance and Z-Series extinguishers, models 690 and 759; models 573, 575, 756 and 758 use part 07309-P instead. Full overview ↓
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Genuine Amerex part from an authorized Amerex distributor. Not a generic substitute.
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Which models does the Amerex 03559 fit?
Per the Amerex Parts Book · page 22| Fits | Extinguisher | UL rating | Capacity | Price | Link |
|---|---|---|---|---|---|
| Model 759 |  27065 Amerex 759 125 lb Wheeled Purple K Fire ExtinguisherParts Book printed p.20 |
120B:C | 125 lb (56.7 kg) | $12,112.00 | View |
Parts list for 125/250 lb. high performance and Z-Series stored pressure wheeled models
Fitment per the Amerex Parts Book. Check the part number against your unit’s nameplate before ordering.
What is the Amerex 03559?
Amerex 03559 is the pressure valve for Amerex 125 lb dry chemical stored pressure wheeled High Performance and Z-Series extinguishers, models 690 and 759; models 573, 575, 756 and 758 use part 07309-P instead. It is the pressure bleeder valve on the extinguisher's discharge valve, and Amerex's service manual directs technicians to use it to reduce cylinder pressure to just below the green operable area before discharging into a closed dry chemical recovery system. Amerex expressly cautions that the bleeder valve must not be used to pressurize the extinguisher, and its cap must be installed to prevent leakage. It is item 14 on Amerex Parts Book 27277 Rev D, printed page 20 (PDF page 22).
Amerex 03559 specifications
| Part number | 03559 |
|---|---|
| Description | Pressure Valve - 690, 759 |
| Parts Book page | printed page 20 (PDF page 22) |
| Diagram item | 14 |
| Models | 690, 759 |
|---|---|
| Alternate part | 07309-P for models 573, 575, 756 and 758 |
| Matching valve cap | 00158-P for models 690 and 759 |
| Amerex item number | 03559 |
|---|
Part data as published by Amerex. Confirm against the current Parts Book revision before ordering for a unit in service.
Amerex 03559 documents
Official Amerex publications · PDFCurrent Amerex publications, hosted on ShopAmerex so links do not break when Amerex reorganizes its site.
Other parts on Parts Book page 22
Parts list for 125/250 lb. high performance and Z-Series stored pressure wheeled models · All 13 parts| Part no. | Part | Pack | Price | Quantity and add to cart |
|---|---|---|---|---|
| 07309-P001 | Pack of 1 | $13.99 | ||
| 07310-P001 | Pack of 1 | $5.99 | ||
| 08573-P001 | Pack of 1 | $138.00 | ||
| 08714-P001 | Pack of 1 | $24.99 | ||
| 08715 | Each | $839.00 | ||
| 09399 | Each | $139.00 | ||
| 09856 | Each | $235.00 | ||
| 27075 | Each | $54.99 |
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 03559 questions
What does the Amerex 03559 pressure valve fit?
Amerex 125 lb dry chemical stored pressure wheeled High Performance and Z-Series models 690 and 759.
Can the 03559 valve be used on model 756 or 758?
No. Those models, along with 573 and 575, use pressure valve part 07309-P.
What does this valve do?
It is the pressure bleeder valve on the extinguisher's discharge valve. Amerex's service manual directs technicians to use it to reduce cylinder pressure to just below the green operable area before discharging the extinguisher into a closed recovery system.
Can the pressure valve be used to charge the extinguisher with nitrogen?
No. Amerex cautions that the bleeder valve must not be used to pressurize the extinguisher; recharging is done through a pressurizing adapter fitted to the discharge port so the dry chemical aerates properly through the downtube.
Does this valve need a cap?
Yes. Amerex's troubleshooting guide states that the bleeder valve cap must be installed to prevent leakage. Models 690 and 759 use cap part 00158-P.
What is the fix for a leak at the bleeder valve?
Amerex's troubleshooting guide directs technicians to remove and reinstall the valve using Teflon tape on the threads, and to confirm the cap is installed.
Where is item 03559 in the Amerex Parts Book?
Item 14 on printed page 20 (PDF page 22) of Parts Book 27277 Rev D, listed alongside the alternate part 07309-P for models 573, 575, 756 and 758.
Is the Amerex 03559 a genuine Amerex part?
Yes. Amerex states that replacement parts must be Amerex parts to protect the UL listing and keep the warranty in effect, and that substitute parts void both.