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11" Domestic Stem Thermostat 40-70C

SKU STK11
In stock: 100+
  • Description
  • Key Features
  • Technical Specifications

The STK11 11-inch Domestic Stem Thermostat is designed to control hot water temperature in large or deep domestic water heater tanks. With a temperature range of 40-70 °C and over-temperature protection at 85 °C, this thermostat helps keep your hot water safe, efficient, and reliable. Rated for 20 A / 250 V, it features a long 11-inch stem for deeper immersion and stable readings. Ideal for households that need a longer reach stem and precise control.

  • Temperature range 40-70 °C, ideal for domestic hot water control. 

  • Over-temperature cut-out at 85 °C for safety in case of thermostat failure.

  • Long 11-inch stem ensures sufficient immersion in larger tanks. 

  • Rated 20 A, 250 V AC — compatible with standard residential water heater circuits. 

  • Operating differential of approx. ± 6-8 °C for stable temperature control.

Specification Value
SKU / Model STK11
Product Type Domestic Stem Thermostat 
Temperature Range 40-70 °C
Over-temperature Cut-Out 85 °C 
Voltage / Current Rating 250 V AC, 20 A 
Stem Length 11-inch (~280 mm) 
Operating Differential ± 6-8 °C 
Equivalent Models ST111, VK4354, EUTVK4354, EUT111, EUT11STEME