NCC 2022 Volume Three - Plumbing Code of Australia

B2

Part B2 Heated water services

Part B2 Heated water services

TAS B2P9 Pressure2019:BP2.3, TAS Exemption 1

Delete clause B2P9 and insert TAS B2P9 as follows:

The points of discharge for a heated water service must—

  1. have—
    1. a working pressure of not less than 50 kPa: and
    2. a static pressure within the building of not more than 500 kPa; or
  2. have water pressures suitable for the correct functioning of the fixture or appliance where water pressures outside of (a)(i) and (a)(ii) are required.

Exemptions

B2P9(a)(i) and B2P9(a)(ii) do not apply to existing low-pressure gravity only water services.

TAS B2D2 Water heater in a heated water supply system2019: TAS B2.2(1)(a) and (d)

Delete clause B2D2 and insert TAS B2D2 as follows:

In a new Class 1 or Class 10 building—

  1. a water heater in a heated water supply system must be—
    1. a solar water heater complying with (b); or
    2. a heat pump water heater complying with (b); or
    3. a gas water heater complying with (c); or
    4. an electric resistance water heater complying with AS/NZS 3500.4; or
    5. a wood fired thermosiphon water heater or direct fired water heater each complying with AS/NZS 3500.4; and
  2. a solar water heater and a heat pump water heater must have—
    1. for a building with 1 or 2 bedrooms—
      1. at least 14 Small-scale Technology Certificates for the zone where it is being installed; or
      2. an energy saving of not less than 40% in accordance with AS/NZS 4234 for a "small" load system; and
    2. for a building with 3 or 4 bedrooms—
      1. at least 22 Small-scale Technology Certificates for the zone where it is being installed; or
      2. an energy saving of not less than 60% in accordance with AS/NZS 4234 for a "medium" load system; and
    3. for a building with more than 4 bedrooms—
      1. at least 28 Small-scale Technology Certificates for the zone where it is being installed; or
      2. an energy saving of not less than 60% in accordance with AS/NZS 4234 for a “large” load system; and
  3. a gas water heater must be rated not less than 5 stars in accordance with AS 4552.

TAS B2D6 Temperature control devices2019: TAS B2.6(d), Application 1 and Exemption 1

Delete clause B2D6 and insert TAS B2D6 as follows:

(1) A temperature control device used to deliver heated water in accordance with B2D5(a) must be a—

  1. thermostatic mixing valve; or
  2. thermostatically controlled tap.

(2) A temperature control device used to deliver heated water in accordance with B2D5(b) must be a—

  1. thermostatic mixing valve; or
  2. thermostatically controlled tap; or
  3. tempering valve; or
  4. temperature limited water heater limited to 50°C in accordance with AS 3498.

(3) The required maximum delivery temperature must be achieved in accordance with AS/NZS 3500.4.

Applications

B2D6 only applies to new and replacement heated water installations.

Exemptions

B2D6 does not apply to the replacement of a single heated water storage unit within a range or bank of heaters.