The 2021 IPC provides minimum regulations for plumbing facilities and provides for the acceptance of new and innovative products, materials, and systems.
Multiple-user toilet facilities to serve all genders are now permitted.
Two new methods for relining/rehabilitation of existing sewers are added.
Accommodations for mounted roof top solar panels over vent terminals is added.
CSA B805/ICC 805 Rainwater Harvesting Systems is allowed as an alternative design method.
Plumbing provisions from ICC A117.1-2017 Standard for Usable and Accessible Buildings and Facilities are now included.