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The L641 surface mount thermostat controls the water temperature in domestic hot water cylinders or in pipes. Suitable for switching motorised zone valves, circulating pumps or boilers, the Honeywell thermostats incorporate a bi-metallic temperature sensor and are double insulated. The cylinder thermostat model is suitable for bare or pre-insulated cylinders and is simply installed using a plastic, coiled wire fixing.

  • Power Supply: 230V 50Hz
  • L641B1004 - 2°C - 40°C (Low limit pipe thermostat)
  • L641B1012 - 50°C - 95°C (High limit pipe thermostat)
  • Cable Clamp: Yes
  • Complete with tamper resistant insert
CE Approved


£31.94 (Inc. VAT)

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Honeywell L641B TamperProof Pipe Stat 50-95 Degrees Reviews

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5.0/ 5
1 reviews
  • Ray Church
    5/ 5

    This thermostatic pipe switch is the essential control factor for installing solid fuel heating systems to deliver domestic hot water and space heating from radiators. Does the job for a realistic price.