Section 31: Injurious refuse not to be discharged into public drain

No person shall, save as may be generally or specially prescribed, throw, empty, or turn, or suffer or permit to be thrown, emptied or turned or to pass, into any public drain, or into any drain communicating with a public drain —

(a) any matter likely to injure the drain or to interfere with the free flow of its contents, or to affect prejudicially the treatment and disposal of such contents; or

(b) any liquid being refuse or steam or other liquid which is, either alone or in combination with the contents of the drain, dangerous, or the cause of a nuisance or prejudicial to health; or

(c) any explosive or inflammable substance.