Page 422 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

TMV2

Approved Document G – Sanitation, hot water safety and water efficiency of
the Building Regulations in England and Wales requires that the hot water outlet
to a bath should not exceed 48°C. It also states that valves conforming to
BS EN 1111 or BS EN 1287 are suitable for this purpose. Similar requirements
exist in Scotland.
TMV2 approval is for the domestic thermostatic installations and uses BS EN 1111
and BS EN 1287 as a basis for the thermostatic valves’ performance testing.

TMV3
INDUSTRY TIP These valves are manufactured and tested for healthcare and commercial

thermostatic installations, and use the NHS specification D08 as a basis for
Frost protection is covered the thermostatic valves’ performance testing.
in detail in Chapter 5, Cold
water systems. Table 6.13 presents a guide to the selection of TMVs for a given application.
 Table 6.13 Guide to TMVs for different applications
Is a TMV: Is a TMV: Is a TMV:
required by legislation or recommended by legislation suggested
Environment Appliance authoritative guidance? or authoritative guidance? best practice? Valve type?
Bath Yes Yes TMV2
Basin Yes Yes
Private Shower
dwelling Bidet
Bath Yes Yes TMV2
Housing Basin Yes Yes
Association Shower
dwelling Bidet
Housing Bath Yes TMV2
Association Basin Yes
dwelling for the Shower Yes
elderly Bidet Yes
Bath Yes TMV2
Basin Yes
Hotel Shower Yes
Bath Yes TMV3
NHS nursing Basin Yes
home Shower Yes
Bath Yes TMV3
Private nursing Basin Yes
home Shower Yes
Bath Yes TMV3
Young persons’ Basin Yes
care home Shower Yes

Schools, Bath Yes, but 43°C max Yes TMV2
including Basin Yes
nursery Shower
➜
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