Anti-Scald and Temperature Control Devices

  • Overview
  • TMV2 Scheme
  • TMV3 Scheme
  • DTC Scheme
  • Benefits of Certification
  • Why Work With NSF?

Since the early 1990s, a method to evaluate and certify anti-scald and temperature control devices was in high demand, in both the healthcare and domestic markets. The demand for this escalated in 1993, when the United Kingdom National Health Service requested an enhanced test regime for thermostatic mixing valves (TMVs) that could react to cold water failure. Since hot water is used as the primary method to control the proliferation of Legionella in the water supply system in many healthcare facilities, temperature control devices that performed as claimed are extremely important. A need for the evaluation of similar devices for the general residential/housing market came about only a few years later.

The BuildCert program (now falling under the NSF International name) created a series of successful testing and certification schemes to evaluate anti-scald and temperature control devices, which can help manufacturers of these products comply with regulations and requirements, including:

  • The UK Department of Health Technical Memorandum 04-01, in that valves comply with the HTM 04-01 Supplement, Performance specification D 08: thermostatic mixing valves (healthcare premises)
  • Part G of the UK Building Regulations by verifying that valves comply with BS EN 1111:1999 (high-pressure thermostatic mixing valves) and/or BS EN 1287:1999 (low-pressure thermostatic mixing valves)
  • Part G of the UK Building Regulations in that valves comply with BS EN 15092 Building valves - Inline hot water supply tempering valves and all applicable requirements

Find out more about specific schemes and services to help prove your product’s quality and performance under the tabs to the left.

TMV2 Scheme

TMV2 is a certification scheme designated for thermostatic mixing valves to be compliant with EN 1111 (high pressure) and/or EN 1287 (low pressure). Certification for these products is especially important as Children’s Burns Trust reported 1,667 acute injury admissions caused by scalding associated with tap splashes or spill and bathing immersion between 2005 and 2011 across England and Wales. This included 1,448 incidents occurring in the home, with 75 people dying as a result of their scalds. In 2012, 3,951 children under the age of 5 had to be admitted to hospital as a result of these burns.

The thermostatic mixing valves covered by the TMV2 scheme are used in domestic properties or other domestic type situations. Due to the high level of injury and death because of burning and scalding, the UK Building Regulations Part G now requires mixing valves to be compliant with EN 1111 and/or 1287 to assure safety for users.

NSF International carries out testing and certification to these standards for a wide variety of temperature designations and installation types.

TMV3 Scheme

TMV3 is a certification scheme designated for thermostatic mixing valves to be compliant with the performance requirements of the UK Department of Health HTM 04-01 Supplement, Performance specification D 08. These thermostatic mixing valves are used in high-risk areas of healthcare premises. This robust performance-based specification ensures the safety of vulnerable people including children, older people and users who are unable to react to prevent injury while washing or bathing.

NSF International carries out testing and certification to this standard for a wide variety of temperature designations and installation types.

DTC Scheme

The Distribution Tempering Control (DTC) valve scheme certifies that distribution tempering valves comply with the performance requirements of Part G of the UK Building Regulations as well as the European standard BS EN 15092: Building valves. In-line hot water tempering valves. This valve is required to be installed when the operating temperature of the domestic hot water storage vessel in a dwelling is capable of exceeding 80°C under normal operating conditions.

NSF International carries out testing and certification to this standard.

Benefits of Certification

NSF provides companies with a single point of contact to help navigate the various regulatory, testing and certification requirements for drinking water treatment, distribution and plumbing products in various countries, including those in the UK. By doing so, we are able to streamline multiple country approval projects from the initial application to final approval, which reduces testing costs and a product’s time to market.

Why Work With NSF?

With more than 70 years’ experience working with manufacturers and regulatory agencies, NSF is well-versed in navigating global market access. Manufacturers all over the world trust NSF, the respected independent testing and certification organization, to provide the approvals needed to leverage new global opportunities.

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