No. Low pressure gas systems (2 psi or less) with more than 10 gas outlets require plan check. Medium and high pressure gas systems (more than 2 psi) require plan check regardless of the number of gas outlets.
No, water from sprinkler drain shall discharge to the sewer.
Yes. However, the emergency drains shall be protected against backflow with backwater valves.
Yes. Graywater Ready Systems are not required when the landscape area on the site does not exceed 500 square feet, or when graywater irrigation is not permitted due to geological conditions, or for additions or alterations that use the existing building drain.
Plastic waste and vent piping in residential occupancies are allowed when the residential portion of the building is 2 stories or less.