Valve Sizing Tool

HORNE 15 Thermostatic Mixing Valve with Integral Isolating Valves


Including integral isolating valves, swivel inlet connections, strainers, check valves and flow regulator. Pipe connections by compression fitting for 15mm copper pipe. In bronze finish. Product Reference H15-21B as per drawing PA-579G. To be installed according to the manufacturer's instructions and commissioned in accordance with water regulations and bylaws using the Horne H15 Flushing kit.

Designed and manufactured by Horne Engineering Ltd

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Suitable for point of use thermostatic mixing at a single basin, groups of basins, bidets and shower outlets.

For sizing a TMV for group mixing applications use our simple

Valve Sizing Tool
Horne H15-24B 4th Connection under basin installation


  • High performance TMV3 approved thermostatic mixing valve delivers accurate and reliable temperature control
  • Full bore, high capacity fine mesh strainer optimised to protect the thermostatic mechanism and all downstream fittings
  • Swivel inlet connections for installation in any orientation
  • Integral isolation valves for ease of maintenance
  • Flow regulator (8 L/min) for water and energy savings contributes to BREEAM rating
  • Quick and easy to install - fewer pipe connections required than traditional installation
  • Easy access to strainers for maintenance, pipe flushing and water sample collection
  • Ease of maintenance

Standards and Approvals

  • The HORNE 15 TMV is designed to meet the requirements of BS7942:2011, 'Thermostatic mixing valves for use in care establishments' and is approved, as a Type 3 thermostatic mixing valve, to NHS Model Engineering Specifications D 08 Thermostatic mixing valves (Healthcare premises).
  • All materials in contact with water are WRAS approved.
  • All HORNE products are manufactured under our Quality Management System to BS EN ISO 9001:2015. Certificate No. FM 01224

Operating Parameters

Mixed water temperature setting at factory   41°C
Range of temperature adjustment   35 - 50°C
Range of hot water supply temperature   55 - 85°C
Maximum static pressure     10 bar
Range of maintained water supply pressures   0.2 - 5 bar 

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