Ansul Hose and Nozzle Assembly W02 - 429543

The Ansul 429543 is a complete hose and nozzle assembly for WO2 Ansul portable fire extinguishers, designed for optimal agent flow and coverage during manual discharge. As a complete pre-assembled unit, the 429543 provides the entire discharge path from the valve outlet to the spray nozzle — replacing both components in a single service operation rather than requiring separate hose and nozzle sourcing. This makes it one of the most efficient fire extinguisher accessories for service shops performing WO2 extinguisher annual inspections or post-discharge service.

The discharge hose and nozzle assembly is subject to significant mechanical stress in active service — flexing during use and inspections, UV degradation in outdoor installations, and nozzle impact damage from routine handling. NFPA 10 requires that the hose and nozzle assembly be inspected at every annual inspection for cracks, blockage, and fitting corrosion. The fire extinguisher hose replacement becomes necessary whenever any portion of the assembly shows structural compromise — and the 429543 complete assembly format means a single part number covers the entire discharge path replacement for the WO2 model.

Available through authorized ansul distributors as part of the ANSUL fire extinguisher parts catalog. The 429543 hose and nozzle assembly fast replacement format is particularly useful during high-volume annual inspection runs where minimizing service time per unit is a priority. Stock alongside extinguisher inspection tags, fill cap gaskets, and o ring supply to ensure complete WO2 service capability on every service vehicle. Document hose assembly replacement on the extinguisher inspection tag and fire extinguisher service tags per NFPA 10.

Inspect the 429543 hose and nozzle assembly at every NFPA 10 annual inspection. Flex the hose through its full range and check for cracking, kinking, or abrasion damage. Inspect the nozzle orifice for blockage and the fittings for corrosion. Replace the entire assembly if any defect is found — never use a partially repaired hose assembly. During the 6-year and 12-year internal examination, remove the assembly and inspect the valve outlet fitting threads before reinstallation. Update extinguisher inspection tags and fire extinguisher service tags after replacement per NFPA 10 documentation requirements.

Is the 429543 the same as the 428736 20-lb hose assembly?

No. The 429543 is specifically for WO2 Ansul extinguishers while the 428736 is for 20-lb Ansul units. These assemblies have different hose lengths, fitting specifications, and nozzle orifice geometries matched to their respective extinguisher models. Always verify the correct assembly part number using the ANSUL fire extinguisher parts list for the specific model being serviced.

Can I replace just the nozzle or just the hose?

If only one component is damaged and the other is in serviceable condition, component-level replacement may be possible depending on the WO2 model design. However, if both components are approaching service age or if the hose shows any degradation, replacing the complete 429543 assembly is recommended — it eliminates two separate service operations and ensures all discharge path components are reset to the same service age simultaneously.