Water Supply and Distribution

Cross-Connections Must Be Eliminated or Protected Against Backflow

What counts as a plumbing cross-connection in a house?

P2902.1

High Water Pressure Requires Pressure Regulation

Does code require a pressure reducing valve over 80 psi?

P2903.3.1

Hose Bibbs Need Backflow Protection Except for Limited Code Exceptions

Do outside hose bibbs need vacuum breakers?

P2902.4.3

Hot Water Distribution Must Limit Wasted Water Where the IRC Requires It

How far can a fixture be from the water heater under IRC?

P2905.1

Hot Water Recirculation Systems Need Controls and Proper Piping

What does code require for a hot water recirculation system?

P2905.2

Irrigation Systems Need Approved Backflow Protection

Does a sprinkler system need a backflow preventer?

P2902.5.3

Quick-Closing Valves Need Water Hammer Arrestors

Are water hammer arrestors required by IRC?

P2903.5

Residential Water Systems Need Adequate Pressure at Fixtures

What is the minimum water pressure required by IRC?

P2903.3

Water Distribution Pipe Must Be Approved for Potable Water

What pipe materials are allowed for residential water supply?

P2906.5

Water Service Pipe Size Must Support the Whole Dwelling Load

What size water service pipe do I need for a house?

P2903.7