D. 1901.]
PUBLIC HEALTH.
[No. 10.
923
plied, and care shall be taken that no cement or other jointing material ojects from the joints into the interior of the pipes;
and any such pro- ing material or other irregularities in the bore of the drain shall be carefully removed.
House-drains shall be firmly bedded in selected material, free from large stones and well rammed into place.
All stoneware pipes shall be well glazed and free from cracks and flaws, and shall have a thickness of not less than one-twelfth of their diameter.
Character of stoneware pipe for house-drain.
8. Disconnecting chambers shall be red-brick manholes, fitted with stoneware traps and ventilating grates of iron or stone.
Disconnecting chambers.
9. Lime mortar used for the building of manholes shall be composed of three parts of sand or red earth and one part of good lime.
Composition of lime mortar used for manhole.
10. Lime concrete used for encasing drains shall be composed of four parts of good sound clean stone, broken to half-inch cubes, two parts of red earth, and one part of lime thoroughly well mixed and well rammed into place.
Composition of lime concrete used for encasing drain.
11. Cement mortar used for the jointing of pipes or any other work shall be mixed in the proportions of three parts of clean sharp sand and one part of good Portland cement, and used fresh.
Composition of cement mortar used for jointing of pipe, etc.
12. No main house-drain shall be less than six inches in clear internal diameter.
Minimum diameter of main house-drain.
Rule as to proper size of drain.
13. Subject to the limitation mentioned in the last preceding By-Law, no main house-drain shall be larger than is necessary, in the opinion of the Board, to carry off the sewage of the dwelling, or the sewage with the rain-water, which, under conditions hereinafter specified in By-Laws 38 to 41, both inclusive, may be admitted to the house-drain.
14-(1.) Every house drain shall have the maximum fall, throughout its length, that the relative levels of the public sewer and of the most remote inlet will admit of: Provided always-
(a.) that the maximum available fall does not exceed one in thirty (or 4 inches in 10 feet): If it does, then the part of the drain more remote from the public sewer may be laid with a fall of one in thirty; and the remainder with such greater fall as may be necessary to connect with the public sewer; and
(b.) that the excavation, necessary to obtain the maximum available fall, is not of such a nature as to endanger the stability of the adjoining or neighbouring property.
In these and similar cases, the gradient may be reduced, subject to the approval of the Board.
Fall of house-drain.
15. Whenever a reduction of fall (below the standard grade 1 in 30) is necessary or permissible, it shall, wherever practicable, be made in the portion of the drain most remote from the public sewer.
Mode of making reduction of fall below standard.
D. 1901.]
PUBLIC HEALTH.
"
[No. 10.
923
plied, and care shall be taken that no cement or other jointing material ojects from the joints into the interior of the pipes;
and any such pro- ing material or other irregularities in the bore of the drain shall be care--
fully removed.
House-drains shall be firmly bedded in selected material, free from large Bedding of nes and well rammed into place.
All stoneware pipes shall be well glazed and free from cracks and flaws, shall have a thickness of not less than one-twelfth of their diameter.
house-drain. -
Character of stoneware pipe..
8. Disconnecting chambers shall be red-brick manholes, fitted with stone- Disconnecting are traps and ventilating grates of iron or stone.
chambers.
9. Lime mortar used for the building of manholes shall be composed of Composition three parts of sand or red earth and one part of good lime.
10. Lime concrete used for encasing drains shall be composed of four parts of good sound clean stone, broken to half-inch cubes, two parts of red earth, and one part of lime thoroughly well mixed and well rammed into
place.
11. Cement mortar used for the jointing of pipes or any other work shall be mixed in the proportions of three parts of clean sharp sand and one part
good Portland cement, and used fresh.,
of lime mortar used for man- hole. Composition of lime con- crete used for encasing drain.
Composition mortar used for jointing of pipe, etc.
of cement
12. No main house-drain shall be less than six inches in clear internal Minimum diameter.
diameter of main house- drain.
Rule as to
proper size of
drain..
13. Subject to the limitation mentioned in the last preceding By-Law, no main house-drain shall be larger than is necessary, in the opinion of the Board, to carry off the sewage of the dwelling, or the sewage with the rain- main house- water, which, under conditions hereinafter specified in By-Laws 38 to 41, both inclusive, may be admitted to the house-drain.
14-(1.) Every house drain shall have the maximum fall, throughout its Rule as to length, that the relative levels of the public sewer and of the most remote
let will admit of: Provided always-
(a.) that the maximum available fall does not exceed one in thirty (or 4 inches in/10 feet): If it does, then the part of the drain more re- mote from the public sewer may be laid with a fall of one in thirty; and the remainder with such greater fall as may be necessary to connect with the public sewer; and
(6.) that the excavation, necessary to obtain the maximum available fall, is not of such a nature as to endanger the stability of the adjoining or neighbouring property.
In these and similar cases, the gradient may be reduced, subject to the pproval of the Board,
fall of house- drain.
15. Whenever a reduction of fall (below the standard grade 1 in 30) is Mode of mak- necessary or permissible, it shall, wherever practicable, be made in the portion of fall below
ing reduction
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