1964_WATERWORKS_REGULATIONS — Page 25

1989 Ed.]

Waterworks Regulations

[CAP. 102

A 25

SCHEDULE 2

PART I

[Subsidiary]

[reg. 19]

1.

PIPES AND FITTINGS

(1) Pipes on a fresh water fire service shall be made of cast iron, wrought iron, steel or copper. (2) Pipes and fittings on a salt water fire service shall be made of such material as the Water Authority, on consultation with the Director of Fire Services, thinks fit.

(3) Pipes on a fresh water inside service shall be made of cast iron, asbestos cement, wrought iron, steel or copper.

(4) Pipes on a salt water inside service shall be made of cast iron, asbestos cement or unplasticized P.V.C.

2.

No pipe shall be less than 20 mm diameter, except that a branch pipe may be 15 mm diameter if the pipe run is short and the pipe supplies only one draw-off point.

3.

No bend or curve shall be made in any pipe so as to diminish the waterway or alter the internal diameter of the pipe in any part.

4. Changes of direction for a pipe of less than 40 mm diameter shall be effected by slow bends and no elbows shall be used.

5.

6.

(a) Cast iron pipes shall comply with BS 4622 for grey iron pipe and with BS 4772 for ductile iron pipe, except that they may incorporate a mechanical or automatic joint of approved design.

(b) Cast iron pipes to BS 4622 and ductile iron pipes to BS 4772 shall be of a class appropriate to the duty required.

Asbestos cement pipes shall comply with BS 486 and shall be of Class 20 or 25 as may be appropriate to the duty required.

7.

Cast iron fittings for use with cast iron or asbestos cement pipes shall comply with BS 4622 for grey iron fittings and with BS 4772 for ductile iron fittings, except that they may incorporate a mechanical joint of approved design, or be plain ended in the case of fittings for asbestos cement pipes. Fittings shall be of a class appropriate to the duty required.

8. (Repealed L.N. 252 of 1977)

9.

Steel pipes shall be galvanized and shall comply with BS 1387 for 'Medium' tubes and tubulars.

10. Malleable cast iron fittings for use with wrought iron or steel pipes shall be galvanized and shall comply with BS 143 or 1256 for malleable cast iron and cast copper alloy pipe fittings.

11. Wrought fittings of iron or steel for use with wrought iron or steel pipes shall be galvanized and shall comply with BS 1740, Part I for wrought iron pipe fittings.

12. Unplasticized P.V.C. pipes and fittings shall comply with BS 3505 for Class 'D' tubes or equivalent.

13. Copper pipes incorporating screw joints shall comply with BS 2871, Part 2, for copper tubes (heavy gauge) for general purposes and screw thereof shall comply with BS 61, for screw threads for copper tubes.

14. Copper alloy pipe fittings and copper alloy three piece unions, for copper pipes screwed in accordance with Table 1 of BS 61, shall comply with BS 66 and BS 99.

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