Guidance to Schedule 2 paragraph 3

Requirements for Water Fittings

All water fittings should be resistant to corrosion.

In the case of backflow prevention devices and any water fittings which are not going to be readily accessible in addition to being corrosion resistant they should be manufactured from materials which are not susceptible to dezincification. For example, gunmetal or CR brass.

Establishing whether a water fitting is suitable for installation is dependent upon a number of factors including but not limited to:

1. Water fittings must be of an appropriate quality and standard

2. System design, things considered include but are not limited to compatibility

   • with other water fittings within a plumbing system (e.g the potential for galvanic action)

   • system operational parameters (e.g. the maximum* and minimum pressure, temperature and flow the systems will be operating at)

3. Location specific factors, things considered include but are not limited to:

   • the environment (e.g. ground or airborne contamination, the risk of frost damage, corrosion or dezincification, external load and ground movement)

   • product installation requirements and/or constraints (e.g. installed where light is excluded or only above ground)

   • installation backflow risks (e.g. the need for backflow protection to be installed)

4. Requirements of schedule 2 as applicable.

* Please note all water fittings must be capable of withstanding an internal water pressure of not less than 1½ times the maximum pressure it will be subject to in operation.