The Meritor SS1800UP air dryer, part number S432-413-059-0 or S4324130590, is a genuine ZF WABCO OEM unit designed for heavy-duty air brake systems that require an external purge tank setup for desiccant regeneration. The unit includes a discharge line for unloading the compressor and uses an external purge tank port (Port 22, 0.25 in.-18 NPTF) to handle desiccant regeneration. The integrated heater runs at 100 watts on a 12-volt circuit, and a wiring harness is included with the assembly. Port sizes are 0.50 in.-14 NPTF at both the supply (Port 1) and delivery (Port 21) connections, and 0.25 in.-18 NPTF at the control port (Port 4). The associated desiccant cartridge is part number R950048. Call us to confirm proper fit for your application.
Features
Genuine ZF WABCO OEM air dryer, model SS1800UP
100-watt heater, 12-volt, with power harness included
Supply port (Port 1) and delivery port (Port 21): 0.50 in.-14 NPTF
Control port (Port 4): 0.25 in.-18 NPTF
Purge tank port (Port 22): 0.25 in.-18 NPTF
Compatible desiccant cartridge: R950048
Tech Specs
- Model: SS1800UP
- Heater: 100-watt, 12-volt
- Supply Port (Port 1): 0.50 in.-14 NPTF
- Delivery Port (Port 21): 0.50 in.-14 NPTF
- Control Port (Port 4): 0.25 in.-18 NPTF
- Purge Tank Port (Port 22): 0.25 in.-18 NPTF
- Desiccant Cartridge: R950048
- Production Number: 432 421 019 0
- Brand: ZF WABCO
- VMRS Code: 013-010-252
