710.3 Sewage Ejector and Pumps — 2025 California Plumbing Code
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-10-19 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Plumbing Code (Title 24, Part 5) § 710.3 · Effective January 1, 2026 · Official source: Building Standards Commission
A sewage ejector or sewage pump receiving the discharge of water closets or urinals:
(1) Shall have a discharge capacity of not less than 20 gpm (1.26 L/s).
(2) In single dwelling units, the ejector or pump shall be capable of passing an 1 1/2 inch (38 mm) diameter solid ball, and the discharge piping of each ejector or pump
shall have a backwater valve and gate valve, and be not less than 2 inches (50 mm) in diameter.
(3) In other than single-dwelling units, the ejector or pump shall be capable of passing a 2 inch (51 mm) diameter solid ball, and the discharge piping of each ejector or pump shall have a backwater valve and gate valve, and be not less than 3 inches (80 mm) in diameter.
[HCD 1 & HCD 2] The minimum size of any pump or any discharge pipe from a sump having a water closet connected thereto shall be not less than 2 inches (50 mm).
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