Vehicles required to be equipped with power brakes and equipped with vacuum or vacuum-assisted brakes shall have a check valve installed and properly maintained in the vacuum system between the source of vacuum and the vacuum reserve.
Cal. Veh. Code § 26522
Vacuum Brakes
Added by Stats. 1963, Ch. 386.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.