Knox Sales Company WH-9 Water Heater Lower Thermostat

Product Description

The KNOX SALES COMPANY WH-9 is a lower thermostat designed for electric water heater applications. It features a 2-point configuration, meaning it controls two separate heating elements or switching contacts within the water heater system. The thermostat monitors water temperature in the lower tank section and signals the heating element to cycle on and off to maintain the set temperature. Licensed plumbers and HVAC technicians are the typical installers of this component during routine water heater service or repair.

This thermostat is intended for use in residential or light commercial electric water heaters as a lower-position replacement component. The lower thermostat in a dual-element water heater manages the bottom heating element, which handles the primary heating load for the tank. It is a common service part replaced when a water heater fails to maintain temperature or when the lower element circuit stops responding.

Key Features

• Lower-position thermostat designed for electric water heater systems
• 2-point switching configuration for dual-contact element control
• Monitors and regulates lower tank water temperature
• OEM-style replacement form factor for straightforward serviceability

Compatibility

Designed as an OEM-style replacement lower thermostat for residential and light commercial electric water heaters with a dual-element configuration.

Installation Notes

Installation should be performed by a licensed plumber or qualified technician. Always shut off electrical power to the water heater at the breaker panel before beginning any thermostat replacement work. Follow applicable local plumbing and electrical codes, including NEC requirements for water heater wiring. Do not restore power until all connections are secure and the access panel is reinstalled.

Technical Specifications

• Position: Lower
• Configuration: 2 Point
• Application: Electric Water Heater

Standard Information

• Brand: KNOX SALES COMPANY
• Manufacturer Part Number: WH-9