Simplex 4098-9857 is a 73 in. plastic sampling tube for Simplex 4098 series duct smoke detector housings. The tube is selected by duct width: the 4098-9857 is the model for overall duct widths of 46 in. to 71 in. (1168 mm to 1803 mm). Installers use it to pull air samples across the duct so the housing can sense smoke.
Specifications
| Duct width range |
46 in. to 71 in. (1168 mm to 1803 mm) |
| Suggested cut length |
3 in. (76 mm) longer than the duct width |
| Material |
Black CPVC, custom extrusion |
| Drilling |
Pre-drilled sampling holes |
| Housing air velocity range |
300 to 4000 ft/min (91 to 1220 m/min) |
Installation notes
- Order one tube per duct width and cut it to length at the job site
- The tube is keyed for proper hole alignment
- Adjacent sizes: 4098-9856 for 24 in. to 46 in. ducts and 4098-9858 for 71 in. to 95 in. ducts
- Follow the duct detector installation instructions (574-776) for placement and testing
