Guidance to Schedule 2 paragraph 4

To be accepted as being of an appropriate quality and standard a water fitting should:

Useful sources of information include BS EN 806, and BS 8558.

Potential contamination risks to plumbing systems include but are not limited to:

Environmental contaminants passing through the body of water fittings. For example, hydrocarbons in soil permeating through plastic pipework.
Ingress of fluids, insects or animals through worn, damaged or incorrectly installed plumbing fittings, warning pipes and overflows. For example, a drain tap installed where it could become submerged in fluids such as groundwater; warning pipes discharging directly into sewerage pipes; rainwater or insects accessing a storage cistern via an unshrouded or unscreened weir overflow.
Warming of water. For example, storage tanks or pipework installed without adequate insulation.
Stagnation. For example, due to oversizing of storage systems, inconsistent demand or redundant ‘deadlegs’ pipework.
Use of non-compliant water fittings and materials. For example, lead solder used on wholesome water systems.
Backflow. For example, where no or incorrect backflow protection is installed.

Potential sources of damage to water systems include but are not limited to:

Pipework laid at too shallow a depth being damaged by vehicles driving over it or flexing in as a consequence of ground movement.
Freezing. For example, due to installation outside the thermal envelope or insufficient insulation.
Changes in the integrity of plumbing fittings due to exposure to high temperatures, excessive pressures, ground or airborne substances, sunlight and/or fittings or materials which are incompatible. For example, galvanic action.
Lack of inspection and/or maintenance
Vandalism