RADHLBNIU AD-9 Air Dryer Purge Valve Replacement with Heater for Bendix 5004341/800405 — Direct-Fit Kit

RADHLBNIU AD9 Purge Valve with heater is a direct-fit replacement for Bendix air dryer models 5004341 and 800405, restoring reliable purge and anti-freeze functionality.

This replacement purge valve is engineered to match the AD-9 air dryer form and function so maintenance teams can quickly swap a worn or failed valve without modifying existing plumbing. It includes the valve, mounting screws and a small tube of silicone grease to help seat seals during installation. The integrated heater element helps prevent moisture freeze-ups in cold climates, while the valve body and components are sized to fit Bendix AD-9 housings.

How straightforward is installing this RADHLBNIU purge valve?

Installation is intended to be user-friendly for truck technicians familiar with AD-9 service. The package contains the valve, three mounting screws and silicone grease so you have the basic parts needed to refit the unit. Standard hand tools are typically all that’s required and the valve aligns to the same bolt pattern as the original Bendix parts.

• Includes 1 purge valve, 3 screws, and silicone grease for seal seating.
• Designed to match AD-9 mounting points for direct replacement.
• Typical install uses common wrenches and a torque spec matching OEM guidance.

Will the heater element prevent freezing in cold weather?

The built-in heater reduces the chance of ice formation around the purge valve during low temperatures, improving air dryer reliability in winter. It helps maintain valve movement and purge timing but should be used with proper system diagnostics and electrical checks. Heater performance depends on correct wiring and power to the dryer heater circuit.

• Heater integrated into valve to limit freeze-related sticking.
• Requires connection to the dryer heater circuit for full benefit.
• Works best with regular dryer maintenance and correct electrical supply.

What compatibility and part-replacement details should I check before buying?

This RADHLBNIU unit is built to replace Bendix parts 5004341 and 800405 used with AD-9 systems. Confirm your air dryer model and existing valve part number to ensure fit. If unsure, remove the old valve and compare mounting pattern, electrical connector and port locations before ordering.

• Listed as compatible with Bendix 5004341 and 800405 AD-9 valves.
• Verify mounting holes, port layout and electrical connector match your dryer.
• Contact the seller or a technician if fitment questions remain.

What comes in the box and are spare parts needed?

The kit arrives with the new purge valve, three mounting screws and a small tube of silicone grease to help create a proper seal during installation. Most installs won’t require extra hardware, but inspect your existing gaskets and fittings; replace any corroded screws or damaged fittings to avoid leaks. Keep a basic hand-tool set and the vehicle manual for torque values.

• Package: 1 AD-9 purge valve, 3 screws, 1 silicone grease tube.
• Inspect and replace old gaskets or corroded hardware as needed.
• Follow OEM torque and wiring recommendations for safety and longevity.

Who is this for: fleet mechanics, independent heavy-vehicle technicians and maintenance managers who service Bendix AD-9 air dryers and need a dependable, plug-and-play purge valve replacement with heater functionality. If you maintain trucks that operate in cold climates or have a failed purge valve causing improper drying or sticky operation, this RADHLBNIU replacement provides a cost-effective option to restore purge performance when matched to the listed Bendix part numbers.