Pilot Assembly, Liquid Propane

Rheem ProTech® Pilot Assembly – OEM Ignition Component for Gas-Fired Water Heaters

The Rheem AP14318D-2 ProTech® pilot assembly is a direct replacement component for select Rheem residential and light commercial gas water heaters. Designed for both natural gas and LP applications, this assembly delivers a stable pilot flame to ensure consistent main burner ignition under a variety of operational conditions. The assembly includes provisions for mounting both thermocouples and thermopiles, supporting compatibility across multiple control systems.

Application & Design Overview

This unit features rugged construction suitable for sustained high-temperature environments and is compatible with a range of Rheem models utilizing standing or millivolt pilot ignition. Flame pattern configurations and gas type adaptability make it a versatile solution for field replacement or OEM system repair. Designed to interface directly with the control valve and burner manifold, the AP14318D-2 maintains system integrity while restoring original ignition function.

Technical Specifications

• Model: AP14318D-2
• Type: Universal Pilot Assembly (Natural Gas / LP)
• Mounting: Supports thermocouple or thermopile configurations
• Flame Pattern: Multiple options (adjusted by application)
• Gas Compatibility: Natural Gas and Liquid Propane
• Use Case: OEM replacement in Rheem atmospheric or direct vent water heaters

Installation Requirements

Installation requires proper alignment of the pilot orifice and secure connection to the gas manifold and thermocouple/thermopile circuit. This work should only be performed by licensed professionals familiar with fuel gas codes and combustion safety. Leak testing, flame verification, and proper sensor placement are critical for safe system operation.

Field Use and Service Applications

Suited for service contractors conducting ignition system repairs, burner replacements, or annual maintenance on gas-fired water heaters. The AP14318D-2 offers compatibility across models that require interchangeable pilot components, reducing stocking needs for multi-system support. Designed to OEM specifications, this assembly restores safe and reliable pilot operation in the field without the need for field fabrication or adjustment.