Construction Performance Guidelines
NOISY WATER PIPES OR “WATER HAMMER”
Water supply pipes shall be installed to minimize the effects of water hammer and in accordance with the Building Code. Drainage pipes shall be installed in accordance with the Building Code.
Two-Year - Delivery and Distribution Systems. · Damage resulting from improper maintenance or additions, deletions or alterations made by the homeowner is excluded from the statutory warranty. · Secondary damage caused by defects, such as property damage or personal injury, is excluded from the statutory warranty.
Plumbing pipes not meeting the acceptable performance shall be repaired.
Repetitive hammering of water supply pipes during normal operation may indicate a problem and should be investigated. A sudden thump or bang of water supply pipes when a faucet or fixture is closed abruptly is normal and not covered by the statutory warranty. Slight “ticking” sounds coming from pipes as they expand are normal and are not covered by the statutory warranty. The sound of water flowing through drainage pipes is normal and not covered by the statutory warranty. Anti-siphon valves on exterior hose bibs may make a high pitch sound or contribute to water hammer. This does not necessarily represent a defect. The anti-siphon valve may need to be cleaned and/or replaced as part of normal home maintenance.