the-ordinances-of-the-legislative-counci-1890v2 — Page 416

HK Historical Laws 香港歷史法例 All

1006 [ 24 of 1887. ) PUBLIC HEALTH .

Floors of cook
houses, &c.
35. The floors of cook -houses, stables, cow -sheds and the like, where
practicable shall be elevated above the ground outside the dwelling, and be
provided with surface channels, passing out through the wall, and delivering
above a trapped -gulley, outside. When new drains are being laid and where
the floor is at the level of the ground outside, the surface -channel of the cook
house, shall be connected to a trap, outside the house, by a straight open pipe,
terminating above the water-level of the trap, which shall be accessible and
in free communication with the air.
Floors of cook
houses, & c.
36. The floors of cook - houses, latrines, privies and back-yards shall be paved
with some impervions and durable material, such as granite setts, or vitrified
bricks, laid on a bed of good concrete not less than four inches thick , and
pointed with good mortar, or with good concrete laid in аa bed not less than six
inches thick and rendered with cement, and shall have a fall from the walls
to the outlet of at least a , inch to the foot.
Fall of yards, & c. 37. All surfaces of back -yards and paved areas of premises wherever
practicable shall have a fall, from the walls of the building towards the trap
or inlet of the drain, at the rate of not less than £ an inch to 1 foot, and such
inlet shall be placed as far from the walls as practicable.
Openings into
drains in yards, 38. Open surfaces such as back -yards, court-yards or other spaces , on
& c. which slops are thrown, or from which foul waters flow, shall be provided
with trapped connections to the house-drains, for the removal of such waters,
as well as some of the rain-water. But such surfaces shall be properly paved ,
in the manner prescribed for back-yards and cook -houses, so that no sand or
silt may be washed into the drains from them .
Surface
channels , 39. Wherever an outlet is available, surface channels shall be provided to
carry excessive rain -fall from premises and these channels shall be properly
connected with the storm-water channel, in the street. Traps not less than
4 inches in diameter in connection with the house -drain shall be placed in
this surface-channel, which will carry off slops or sewage, as well as some
rain - fall.
Diversion of
rain -water. 40. Rain -water shall be diverted from house -drains by means of surface
channels or otherwise to the fullest extent practicable.
Admission of
rain -water . 41. The rain -water from roofs, which slope towards enclosed court-yards,
or back -yards, may , if diversion to the surface channel is impracticable, be
received into the house- drain. But no ventilating pipe shall be used for the
conveyance of rain-water from the roof.
Sub - soil drairg.
42. No person shall, where it can possibly be aroided , lay any pipe for
conveying sub -soil drainage in such manner or in such position as to com
municate direct with any sewer, cess- pool or drain used for the conveyance
or reception of sewage.
NOTE.-It is important to exclude sewage tainted air from the sub-soil. The connec
tion of sub -soil drains to sewers eren if a trap is used is objectionable, because in dry
weather the flow of the drain may cease and the water or the trap may dry up and leare
a free communication between the sewer and the sub -soil drain . The object of sub - soil
drainage is not only the removal of water, but the aeration of the sub -soil. The mouths
of such drains therefore should be so placed that pure air can enter freely, a condition
incompatible with direct connection with sewers or house-drains.
New drains and
cess - pools. 43. In every case where the course of a new drain shall be diverted, any
cesspool previously existing and into which such new drain may have
previously emptied, shall be cleansed , deodorized and filled with clean earth .
New drains.
44. All new drains or drainage works, shall be built and carried out in all
respects in accordance with the provisions of Ordinance No. 24 of 1887 and
of these bye-laws and of any that may be made hereafter and if no written
notice as provided in bye -law No. 1 shall have been given to the board by
any person about to construct, reconstruct, alter or amend any new drain on

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