ShopAmerex.com · Amerex 19787 datasheet · https://shopamerex.com/products/amerex-19787-downtube-assembly-novec-1230-wheeled-unit · Figures as published by Amerex · Verified Sep 2, 2026
Genuine Amerex service part·Part no. 19787
Amerex 19787 Downtube Assembly, Novec 1230 Wheeled Unit
Amerex 19787 is the downtube assembly for the Amerex Model 775 150 lb SF 1230 wheeled clean agent extinguisher, listed as item 22, part 19787, Downtube Assembly, on Parts Book PN 27277 REV D, page 26 (PDF page 28). Full overview ↓
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Which models does the Amerex 19787 fit?
Per the Amerex Parts Book · page 28| Fits | Extinguisher | UL rating | Capacity | Price | Link |
|---|---|---|---|---|---|
| Model 775 |  28325 Amerex 775 150 lb Wheeled SF 1230 Clean Agent Fire ExtinguisherItem 22 on the Model 775 parts page |
3A:80B:C | 150 lb | $16,965.00 | View |
Parts list for 150 lb. SF 1230 wheeled model
Fitment per the Amerex Parts Book. Check the part number against your unit’s nameplate before ordering.
What is the Amerex 19787?
Amerex 19787 is the downtube assembly for the Amerex Model 775 150 lb SF 1230 wheeled clean agent extinguisher, listed as item 22, part 19787, Downtube Assembly, on Parts Book PN 27277 REV D, page 26 (PDF page 28). It is an internal part of the unit's operating valve: at the six-year complete maintenance the valve assembly is removed and taken apart by removing the downtube, spring and valve stem assembly, and the Owner's Manual directs inspecting the spring and downtube assembly and replacing parts that are worn or damaged before the valve is reassembled. A downtube and retainer assembly also ships inside the complete replacement valve assembly, part 22978. Amerex replacement parts must be used to protect the UL listing and keep the warranty in effect.
Amerex 19787 specifications
| Part number | 19787 |
|---|---|
| Parts Book description | Downtube Assembly |
| Parts Book item number | 22 |
| Parts Book page | 26 (PDF page 28) |
| Model | 775 |
|---|---|
| Extinguisher | Amerex 775 150 lb wheeled SF 1230 clean agent extinguisher |
| Shipping weight (packaged) | 5.12 lb |
|---|
| Amerex item number | 19787 |
|---|
Part data as published by Amerex. Confirm against the current Parts Book revision before ordering for a unit in service.
Amerex 19787 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 28
Parts list for 150 lb. SF 1230 wheeled model · All 10 parts| Part no. | Part | Pack | Price | Quantity and add to cart |
|---|---|---|---|---|
| 19789 | Each | $19.99 | ||
| 19793 | Each | $276.00 | ||
| 21920 | Each | $1,042.00 | ||
| 21941 | Each | $508.00 | ||
| 22978 | Each | $1,002.00 | ||
| 22984 | Each | $82.99 | ||
| 23544 | Each | $905.00 | ||
| 23634 | Each | $1,202.00 |
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 19787 questions
What does the Amerex 19787 downtube assembly fit?
The Amerex Model 775 150 lb SF 1230 wheeled clean agent extinguisher. It is item 22 on the Model 775 parts page of Parts Book PN 27277 REV D.
When is the downtube assembly replaced?
At the six-year complete maintenance the valve is disassembled and the spring and downtube assembly are inspected; the Owner's Manual directs replacing parts that are worn or damaged.
Is a downtube included with a new valve assembly?
Yes. The Parts Book states that replacement valve assemblies include the downtube and retainer assembly, so part 22978 already contains one.
Is the Amerex 19787 a genuine Amerex part?
Yes. It is Amerex part 19787, item 22 in Parts Book PN 27277 REV D, and Amerex requires its own replacement parts to protect the UL listing and keep the warranty in effect.
Which manual covers servicing this part?
Owner's Service Manual PN 19795, which covers the SF 1230 wheeled extinguishers, Models 775 and 776.
Does the Amerex 19787 fit any other model?
Parts Book PN 27277 REV D lists part 19787 on one parts page only, the Model 775 150 lb stored pressure wheeled SF 1230 extinguisher on page 26.