Valve Sizing Tool

HORNE 25 Thermostatic Mixing Valve


Including swivel inlet connections, strainers and check valves. Pipe connections by compression fitting for 28mm copper pipe. In chromium plated finish. Product Reference H25-11C and drawing D9441. To be installed according to the manufacturer's instructions and commissioned in accordance with water regulations and bylaws using the Horne H25 Flushing kit.

Designed and manufactured by Horne Engineering Ltd.

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Suitable for group mixing applications such as a group of showers or basins.

For sizing a TMV for group mixing applications use our simple

Valve Sizing Tool
A group installation of Duso shower columns fed with pre-blended warm water from a group TMV (Horne 20 or Horne25)


  • High performance thermostatic mixing valve delivers accurate and reliable temperature control
  • High capacity fine mesh strainers optimised to protect thermostatic mechanism of mixing valve and downstream fittings
  • Easy access to strainers for maintenance, pipe flushing and water sample collection
  • Ease of Maintenance 

Standards and Approvals

  • The H2501 is UK Water Regulation 4 approved (materials approval), KIWA certificate 2104718
  • All HORNE products are manufactured under our Quality Management System to BS EN ISO 9001:2015. Certificate No. FM 01224

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Recent Installations

  • Armley Leisure Centre
  • LB Hounslow Leisure Centres
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  • St. Michael's & St. Martin's P. School
  • Stafford Rugby Football Club
  • Walkwood Middle School
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Maintenance Support

Optimise performance and maximise the lifespan of your Horne Optitherm thermostatic taps, showers and point-of-use mixing valves.

Click the link to access a full suite of narrated installation and maintenance training videos, plus other instructional resources.

Online Training

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