Traps for
16
(b) dip down, inside the tank, so as to terminate in a position no more than six inches above the bottom of the tank; and
(c) discharge in a conspicuous position.
24. (1) Every soi! fitment shall be provided with a suitable trap sod fitments. with a water seal of not less than two inches.
Traps for
waste
fitments.
(2) The internal diameter of every such trap shall be not less than- (a) three inches, in the case of a watercloset fitment, slop sink, o urinal with more than three basins or stalls or with a chamdi longer than six feet;
(b) two inches, in the case of a urinal with more than one and not more than three basins or stalls or with a channel not longer than six feet;
(c) one and a half inches, in the case of a bidet or urinal with a
single basin or stall; and
(d) four inches, in the case of a trough watercloset.
25. (1) Every waste fitment shall be provided immediately under the fitment with a suitable trap:
Provided that a trap shall not be required-
(a) where the waste pipe from such fitment~
(i) does not exceed three feet six inches in length; and (ii) discharges over or into a suitable trapped gully;
(6) in respect of lavatory basins, where the waste pipes therefrom discharge in the manner provided by paragraph (2) of reguls- tion 12:
(c) in respect of a range of shower baths, where the drainage channel provided therefor is provided, at its lowest point, with a trap.
(2) Save as provided in paragraph (3), every trap provided for a waste fitment shall have~~
(4) an internal diameter of not less than one and a quarter indesi
and
(b) a water seal of not less than one and a half inches.
(3) Where the waste pipe from a waste fitment is, under the proj visions of paragraph (3) of regulation 12, connected to a soil pipe, the trap provided for the waste fitment sball-
(c) have an internal diameter of not less than one and a quano]
inches:
(6) have a water seal of not less than three inches; and
(c) be-
(i) adequately ventilated; or
(ii) constructed to prevent loss of water seal.
17
Pipes and eaves guiters.
26. (1) The internal diameter of every soil pipe from a watercloset Soil pipes. fitment or slop sink shall be not less than-
(u) three inches; or
(6) the internal diameter of the outlet pipe of the trap of any
f(ment to which the soil pipe is connected.
whichever is the greater.
(2) The internal diameter of every soil pipe from a urinal or bidet shall be not less than the internal diameter of the outlet pipe of the trap of any fitment to which the soil pipe is connected.
(3) Every soil pipe shall be properly connected to a covered drain without the intervention of any trap.
27. (1) Waste pipes to which the waste from one waste fitorent Waste pipes.
19 discharged shall have an internal diameter of not less than—
(c) one and a quarter inches; or
()the internal diameter of the outlet of the trap to which the waste
pipe is connected,
whichever is the greater.
(2) Waste pipes to which the waste from more than one fitment is discharged shall be of adequate diameter to convey all such waste.
(3) Every waste pipe shall terminate at its lower end not more than six inches above the channel or trapped gully over or into which it discharges.
28. (1) Soil pipes and waste pipes shall not have bends therein, Bends in cxcept where unavoidable.
soil and waste pipes.
(2) Whenever a bend is unavoidable- (a) the bend shall—
()) have an obtuse angle;
(i) have the largest practicable radius of curvature; and (i) not change in any way the cross section of the pipe; and
(6) a cleaning eye or other suitable means of access shall be
provided at or near the bend.
soil and
29. (1) Sufficient access shall be provided, by means of cleaning Access to yes or other approved method, to enable soil pipes and waste pipes to be cleared of any obstruction.
waste pipes.
(2) Such access points shall be so sited as to allow clearance for the easy entry of cleaning rods.
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