175.95 ex. VAT

HORNE H15-21B TMV3 Thermostatic Mixing Valve
•Full bore fine mesh strainers
•Check valves on hot and cold supplies
•Swivel inlet connections with flat faced unions
•Integral isolating valves on hot and cold supplies
•Compression fittings for 15mm OD copper pipe on all connections
•Flow regulator – 8 l/min


HORNE H15-21B 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.

Horne H15-21B Thermostatic Mixing Valve Applications

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


  • 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
  • Maintenance support

HORNE H15-21B Accessories

  • In-line Thermal Disinfection Unit (ILTDU)
  • HORNE 15 Flushing Kit
  • Monitoring Kit

Horne H15-21B Thermostatic Mixing Valve Standards and Approvals

The HORNE 15 TMV is designed to meet the requirements of BS7942:2000, ‘Thermostatic mixing valves for use in care establishments’ and is approved, under the TMV3 Scheme, 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 9001:2000. Certificate No. FM01224

Horne H15-21B Thermostatic Mixing Valve

A DN15 point of use thermostatic mixing valve (TMV) for wash hand basins, bidets, baths and showers in hospitals, schools, sport and leisure facilities, prisons and other public buildings.

Thermostatic mixing valves (TMVs) mix the hot and cold water supplies to produce a temperature-controlled flow. The hot water supply is typically around 60°C, and is maintained at this temperature to prevent the growth of harmful organisms, such as Legionella bacteria.  A supply of higher temperature water is also required for cleaning and washing purposes in the kitchen and laundry while also increasing the overall capacity of warm water (mixed with cold) to the building. Water at 60°C, however, can scald and so it is mixed with cold water, at the point of discharge, to produce a flow at a safe and comfortable temperature of 41°C.

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