Every rule your project must meet, found for you.

NI-wide·Technical Booklet N Drainage

The Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993 (the Workplace Regulations) contain some requirements which affect building design. The main requirements are now covered

NI-wide·Technical Booklet N Drainage

A cesspool shall be— (a) of suitable depth to enable it to be emptied completely; (b) properly covered so as to be impervious to surface water and rainwater; (c) fitted with a suitable manhole cover f

NI-wide·Technical Booklet N Drainage

Any structure to which paragraph (1) applies other than a cesspool shall be— (a) of suitable depth; (b) of adequate size, having in no case a capacity of less than 2.7 m³; (c) covered or fenced in; (d

NI-wide·Technical Booklet N Drainage

It is the view of the Department that the requirements of regulations 80 and 81 will be met if a foul water drainage system – (a) conveys the flow of foul water to a foul water outfall connected to a

NI-wide·Technical Booklet N Drainage

The guidance in Section 2 covers various aspects of sanitary pipework design including suitable materials, pipe sizing, capacity of pipes, seals and ventilation. Guidance is also given on drainage for

NI-wide·Technical Booklet N Drainage

It is the view of the Department that the requirements of regulation 82 will be met if – (a) rainwater from a building is carried away from the surface by a drainage system; and (b) a rainwater draina

NI-wide·Technical Booklet N Drainage

Section 4 gives guidance on the design of rainwater drainage including suitable materials, the sizing of pipes, gutters and outlets, and the capacity of the system related to the expected flow and the

NI-wide·Technical Booklet N Drainage

The provisions in this Technical Booklet are applicable primarily to domestic buildings and small non-domestic buildings. For larger or more complex systems seek specialist advice.

NI-wide·Technical Booklet N Drainage

The materials for sanitary pipework should be in accordance with the relevant standard given in Table 2.1. Where different metals are used they should be separated by non-metallic material to prevent

NI-wide·Technical Booklet N Drainage

The capacity of a sanitary pipework system should be adequate to carry the expected flow at any point, provided that where a minimum size of pipe is stated in a paragraph, Table or Diagram that size o

NI-wide·Technical Booklet N Drainage

Material Relevant standard Pipes: Cast iron BS 416, BS EN 877 Copper BS EN 1254 Galvanised steel BS EN 1057 uPVC BS 3868 Polypropylene BS 4514, BS EN 1329 Other plastic BS EN 1451 BS EN 1329, BS EN 14

NI-wide·Technical Booklet N Drainage

Appliance Flow rate (litres/sec) WC (9 litre cistern) 2.30 Washbasin 0.60 Spray tap basin 0.06 Sink 0.90 Bath 1.10 Shower 0.10 Automatic washing machine 0.70 Urinal (per person unit) 0.15

NI-wide·Technical Booklet N Drainage

Where an overflow pipe discharges to a branch pipe or a stack it should do so through a trap. In all other cases an overflow pipe should discharge in a visible location and should not cause dampness i

NI-wide·Technical Booklet N Drainage

A branch pipe should be at least the same diameter as the appliance trap and where it serves more than one appliance and is unvented, it should be of at least the diameter and gradient given in Table

NI-wide·Technical Booklet N Drainage

The branch pipe from an appliance on a storey above the ground storey should discharge into another branch pipe or a discharge stack. An appliance on the ground storey may discharge into another branc

NI-wide·Technical Booklet N Drainage

Common branch discharge pipes (unvented) Appliance | Max number to be connected | Max length of branch (m) | Min size of pipe (mm) | Gradient limits (fall per metre) min (mm) | max (mm) WCs | 8 | 15

NI-wide·Technical Booklet N Drainage

Rodding points should be provided to give access to any length of branch pipe which cannot be reached by removing a trap.

NI-wide·Technical Booklet N Drainage

Branch connections to stacks. Minimum height (H) requirements: houses up to 3 storeys 450 mm; any building up to 5 storeys 750 mm; any building up to 20 storeys 1 storey; any building over 20 storeys

NI-wide·Technical Booklet N Drainage

A stack should discharge into a drain and be of at least the internal diameter given in Table 2.5. The diameter of a stack should not reduce in the direction of flow, nor have an offset in any part ca

NI-wide·Technical Booklet N Drainage

Rodding points should be provided to give access to a length of stack or discharge stacks which cannot be reached from another part of the system.

NI-wide·Technical Booklet N Drainage

The materials for drains should be in accordance with the relevant standards given in Table 3.1. Where different metals are used they should be separated by non-metallic material to prevent electrolyt

NI-wide·Technical Booklet N Drainage

Material for underground foul drainage Material Relevant standard Rigid pipes: Fibre cement BS EN 588 Vitrified clay BS 65, BS EN 295 Concrete BS 5911, BS EN 1916, BS EN 1917, BS 437 Grey iron BS 437

NI-wide·Technical Booklet N Drainage

The system should have as few changes of direction and gradient as practicable, and access points (see paragraph 3.12) should be provided at such changes. Drains should be laid to an even gradient and

NI-wide·Technical Booklet N Drainage

The capacity of a system should be adequate to carry the expected peak flow at any point provided that the pipe diameter is not less than 100 mm where the drain carries water from a WC and 75 mm in al

NI-wide·Technical Booklet N Drainage

The capacity of a system carrying both foul water and rainwater should be adequate for the combined peak flow. see para 3.3

NI-wide·Technical Booklet N Drainage

An access point should be provided at the following – (a) at or near the head of each length of drain; (b) at a bend; (c) at a change of gradient; (d) at a change of pipe size; (e) at a junction; (f)

NI-wide·Technical Booklet N Drainage

Internal sizes Cover sizes Type Depth to invert (m) Length x width (mm x mm) Circular (mm) Length x width (mm x mm) Circular (mm) Rodding eye – As drain but minimum 100 – – – Access fitting: small lar

NI-wide·Technical Booklet N Drainage

An access point should contain the foul water under working conditions, restrict the entry of ground water and rainwater, and be constructed of a material given in Table 3.6.

NI-wide·Technical Booklet N Drainage

A drain of diameter less than 300 mm should be capable of withstanding a test either – (a) by water to a pressure equal to 1.5 m head of water measured above the invert at the top of the drain; or (b)

NI-wide·Technical Booklet N Drainage

A drain which is to be water tested should be divided into sections so that the head of water at the lower end of the section should not exceed 4 m. The section of drain should be filled, left standin

NI-wide·Technical Booklet N Drainage

Gutter joints should remain watertight under working conditions. A rainwater pipe inside a building should be capable of withstanding the test described in paragraph 2.4. A rainwater drain (other than

NI-wide·Technical Booklet N Drainage

British Standards BS EN ISO 12944: Parts 1 to 8 Paints and varnish. Corrosion protection of steel structures by protective paint systems. BS EN ISO 14713: 1999 Zinc coatings. Guidance and recommendati

NI-wide·Technical Booklet N Drainage

BS EN 1254-1: 1998 Copper and copper alloys. Plumbing fittings: Part 1: Fittings with ends for capillary soldering or capillary brazing to copper tubes. Incorporating Amendment: AMD 10099 July 1998. P

NI-wide·Technical Booklet N Drainage

BS EN 12200-1: 2000 Plastics rainwater piping systems for above ground external use – unplasticized poly (vinyl chloride) (PVC-U): Part 1: Specifications for pipes, fittings and the system. BS EN 123