{"data":{"id":"us-nyc/n.y.c.-admin.-code-pc-914","jurisdiction":"us-nyc","citation":"N.Y.C. Admin. Code § PC 914","heading":"Section PC 914: Circuit Venting","body":"914.1 Circuit vent permitted.\n\nA maximum of eight fixtures connected to a horizontal branch drain shall be permitted to be circuit vented. Each fixture drain shall connect horizontally to the horizontal branch being circuit vented. The horizontal branch drain shall be classified as a vent from the most downstream fixture drain connection to the most upstream fixture drain connection to the horizontal branch.\n\n914.1.1 Multiple circuit-vented branches.\n\nCircuit-vented horizontal branch\n\t\t\t\t\t\t\t\t\t\t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\tdrains are permitted to be connected together. Each group of a maximum of eight fixtures shall be considered a separate circuit vent and shall conform to the requirements of this section.\n\n914.2 Vent connection.\n\nThe circuit vent connection shall be located between the two most upstream fixture drains. The vent shall connect to the horizontal branch and shall be installed in accordance with Section \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t905\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t. The circuit vent pipe shall not receive the discharge of any soil or waste.\n\n914.3 Slope and size of horizontal branch.\n\nThe slope of the vent section of the horizontal branch drain shall be not greater than one unit vertical in 12 units horizontal ( 8.3-percent slope). The entire length of the vent section of the horizontal branch drain shall be sized for the total drainage discharge to the branch.\n\n914.3.1 Size of multiple circuit vent.\n\nEach separate circuit-vented horizontal branch that is interconnected shall be sized independently in accordance with Section 914.3. The downstream circuit-vented horizontal branch shall be sized for the total discharge into the branch, including the upstream branches and the fixtures within the branch.\n\n914.4 Relief vent.\n\nA relief vent shall be provided for circuit-vented horizontal branches receiving the discharge of four or more water closets and connecting to a drainage stack that receives the discharge of soil or waste from upper horizontal branches.\n\n914.4.1 Connection and installation.\n\nThe relief vent shall connect to the horizontal branch drain between the stack and the most downstream fixture drain of the circuit vent. The relief vent shall be installed in accordance with Section \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t905\n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t.\n\n914.4.2 Fixture drain or branch.\n\nThe relief vent is permitted to be a fixture drain or fixture branch for fixtures located within the same branch interval as the circuit-vented horizontal branch. The maximum discharge to a relief vent shall be four fixture units.\n\n914.5 Additional fixtures.\n\nFixtures, other than the circuit-vented fixtures, are permitted to discharge to the horizontal branch drain. Such fixtures shall be located on the same floor as the circuit-vented fixtures and shall be either individually or common vented.","path":["New York City Administrative Code","Title 28","Chapter 6: New York City Plumbing Code"],"source_url":"https://files.amlegal.com/pdffiles/NewYorkCity/Admin/XML.zip","current_through":"Local Law 2026/135 (enacted August 31, 2026)","vintage":"","retrieved_at":"2026-09-06T02:48:57Z","sha256":"217caedce01265f7ad8eba02395b7af9afa823a7c02f6f91d29bf0d74d02d85b","source_id":"us-nyc","stale":false,"prev":"us-nyc/n.y.c.-admin.-code-pc-913","next":"us-nyc/n.y.c.-admin.-code-pc-915"},"notice":"GroundRules: Original legal text. Not legal advice."}