Ao Smith 100281572 Pilot Thermopile Tube Assembly Lp

Product Description

The AO SMITH 100281572 is a pilot thermopile tube assembly kit designed for LP (liquid propane) water heaters. The thermopile generates a small millivolt signal from the heat of the pilot flame, powering the gas valve control circuit without requiring external electricity. This kit includes the pilot assembly and thermopile tube components needed for a complete service replacement. It is intended for installation by licensed plumbers or qualified water heater service technicians working on AO SMITH HWL-series LP water heater units.

This assembly is used in residential LP gas water heater applications where the standing pilot ignition system requires service or replacement. The HWL designation indicates this part is specific to that product line within the AO SMITH water heater range. Technicians typically encounter this replacement need when a unit fails to maintain pilot flame, produces no hot water, or the gas valve does not open due to insufficient thermopile output voltage.

Key Features

• Complete kit format includes pilot and thermopile tube assembly for a single-visit repair
• Configured for LP (liquid propane) gas fuel type
• Thermopile design generates millivolt output to power gas valve without external power supply
• OEM-matched replacement specific to AO SMITH HWL-series water heaters
• Restores standing pilot ignition system function

Compatibility

Designed as an OEM-style replacement pilot thermopile tube assembly kit for AO SMITH HWL-series LP gas water heaters.

Installation Notes

Installation should be performed by a licensed plumber or qualified gas appliance technician. Shut off the gas supply and allow the unit to cool completely before disassembling the pilot assembly. Work must comply with applicable local codes and the manufacturer service documentation for the specific unit. Do not restore gas flow until all connections have been verified leak-free using an approved leak detection method.

Technical Specifications

• Fuel Type: LP (Liquid Propane)
• Assembly Type: Pilot Thermopile Tube Assembly Kit
• Product Line: HWL

Standard Information

• Brand: AO SMITH
• Manufacturer Part Number: 100281572