JULY 17. THE NEW ZEALAND GAZETTE. 1519

36. Where lead pipe is used for waste or vent pipes such pipes must not be lighter than of 6lb. lead, but where in the opinion of the Board a heavier weight may be required, its instructions shall be complied with. Lead pipes must be seamless.

37. The arrangement of waste-pipes must be as direct as possible. The following are the minimum sizes of waste and vent pipes and weights of lead to be used throughout, unless otherwise specially ordered by the Inspector :—

38. Vent-pipes shall not be less than two-thirds the diameter of the waste they ventilate, and no vent-pipe is to be less than the sizes given above.

39. External vent-pipes and waste-pipes of galvanised iron shall not be less than 26-gauge.

40. Stoneware pipes shall be jointed with freshly mixed mortar, composed of one part of Portland cement and two parts of clean, sharp, coarse sand. The spigot end of pipe shall be right home in the socket, and the faucet space shall be concentric and thoroughly well filled with fresh mortar. After a joint is made a scraper must be used to remove from the inside any mortar that may have squeezed in, and the joint be left perfectly even.

41. All joints in cast-iron pipes must be so filled with gasket and lead as to make them perfectly gastight. Joints between lead and cast-iron to be made in a similar manner, the lead pipe being first provided at end with a brass sleeve or ferrule of similar diameter attached by a wiped joint. All lead to lead joints to be wiped-soldered. Joints with white-lead to be used for wrought-iron.

42. As far as possible no drainpipe shall pass beneath any building; where, however, this is unavoidable the pipe must be of cast-iron, lead-jointed, or if of stoneware the pipe must be bedded in and surrounded with good cement concrete 4 in. in thickness. In every such case the pipe shall be properly ventilated by a suitable shaft or opening at each end.

43. A boundary or disconnector trap shall be placed in the line of every house-drain over 10 ft. in length, at a point on the sewer side of the first branch drain, at or as near as possible to the boundary of the premises. Such trap shall be of stoneware of approved pattern and quality. (The pattern known as the Buchan trap is admissible.) Such trap shall have, situated on the side furthest from the sewer, an air-inlet, which shall be carried up to surface of ground and fitted with an iron grating.

44. Every drainpipe constructed so as to be capable of carrying off water or any liquid from any private premises in the district, and connecting with any main sewer or public pipe drain in the said district, shall have proper and efficient, and at all times well and sufficiently repaired, stench-traps, with properly and efficiently constructed watertight receiving-pits or basins above attached, of earthenware, stone concrete, brickwork, or metal, to the satisfaction of the Board.

45. Every owner or occupier of any such private premises the pipe drain from which shall connect with any main sewer or public pipe drain and shall be without such appliances shall, after receipt of a note in writing from the said Board, or any officer thereof, so to do, and within the time specified, provide, and properly and efficiently construct, such stench-trap, with watertight receiving-pits or basins as aforesaid, to the satisfaction of the said officer; and in the case of stench-traps, receiving-pits, or basins out of repair, after receipt of a like notice, well and sufficiently repair the same within the time specified in such notice to the satisfaction of the said officer.

46. Traps of three classes may be used, viz. :—

(a.) Traps for intercepting gases only, to be of round section and self-cleansing form, but not so easy as to empty by momentum or suction.

(b.) Silt-traps, for intercepting both gases and solids, to have slightly tapered sides, flat bottoms, and rounded, not sharp, angles, and provided with trays fitted with handles for catching or removing solids.

(c.) “Grease-traps,” for solidifying and collecting grease or other semi-fluid matter liable to foul the pipes, must be of such form as may be approved by the Inspector.

47. The term “gully” will be applied to traps (a) and (b) in cases where they are to be used externally and fitted with dished tops and gratings. In such cases the dish must be in one piece with the trap, or jointed thereto, spigot and faucet, and the depth of the dish from the top of the grating must not be less than half the diameter of the pipe, and the grating must be removable.

48. The term “disconnector” will be applied to the traps in cases where provision has to be made for inlet ventilation for the pipe or pipes discharging therein.

49. All traps must have a water-seal of at least half the diameter of the outlet-pipe, but in no case less than 2¼ in.

50. Every urinal, lavatory, slop-sink, kitchen-sink, bath, and every tub, or sets of tubs, having more than 10 ft. of waste must be separately trapped by an approved trap placed on the waste-pipe as close to fixture as possible. The trap must be of equal bore with the waste-pipe, and be provided with an access-cap for inspection.

51. Sinks in all butchers’ shops, hotels, restaurants, and boardinghouses, or wherever ordered by the Board, shall be provided with suitable approved grease-traps. Wash-rooms for carriages, carts, &c., must have silt-traps provided, with proper means of intercepting mud, grit, &c.

52. Stables, cab-stands, &c., and paved back-yards, for which drainage permits have been granted, must be provided with suitable approved silt-traps.

53. In no case shall traps known as D traps or Bell traps be used.

54. All lead traps shall be drawn or worked.

55. In all cases where houses are provided with water-closets, or where the drain-connection to sewer exceeds 40 ft., at the highest point of the drain a ventilation-shaft shall be furnished, having a diameter of 4 in., or the soil-pipe may be carried up full width as air-shaft. No part of such shaft shall be placed inside any building. Such shaft shall be carried to a height not less than 4 ft. vertically above high eave in respect of which such disconnector trap is made. A cap or cowl of an approved pattern shall be fixed on the top thereof. No connection other than with the drain shall be made to any main ventilation-shaft. Where underground, every such ventilation-shaft shall be of stoneware drainpipes laid in a workmanlike and efficient manner and to the satisfaction of the Inspector, or of cast-iron pipe with lead or rust joints. To a height of 6 ft. above the surface of the ground the shaft shall be of cast-iron not less than ³⁄₁₆ in. in thickness, similarly jointed, or of screwed wrought-iron piping; thence to its outlet it may be made of cast-iron, screwed wrought-iron pipe, 6lb. lead or galvanised iron of not less than 24 B.W.G. The connection between the stoneware and the vertical pipe shall be made with cement, which, together with all other joints, shall be perfectly airtight. If galvanised iron is used, the pipes shall be made with double-lapped and soldered longitudinal joints in long lengths, and the transverse joints shall be not less than 2 in. in length, slipped or socketed and soldered. The connection between the galvanised-iron pipe and the cast-iron portion of the shaft shall be of lead run in and caulked, the portion of the galvanised-iron pipe inside the socket of the cast-iron pipe being strengthened by a galvanised-iron band, 3 in. wide, of 20 B.W.G. soldered to it. Putty shall not, under any circumstances, be used for jointing any ventilation-pipes. No angular joints or elbows shall be used below the eaves level. This shaft shall be properly constructed and supported, and carried in as direct a manner as possible.

56. If after a ventilation-shaft shall have been erected the same shall, by reason of the erection of any new building or buildings, or the addition to or alteration of any building (including any building in respect whereof such shaft may have been furnished), or by reason of any other matter or thing, become or be in a position, or in any other respect, not in accordance with the foregoing section, it shall be lawful for the Board, by notice in writing signed by the Clerk, to require the owner of the premises upon which such shaft shall be erected to do within a stated time any reasonable act or things, to be specified or indicated in such notice, so as to cause such shaft to be in accordance with the said foregoing section, or with any of the provisions of such section that may be referred to in that behalf in such notice; or by like notice to require such owner, within a stated time, to remove or effectually stop up such shaft, and to remove or

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