Question 1

1. What is meant by groundworks?

Accepted Answer

Groundworks refers to all work carried out to prepare sub-surfaces before construction begins. This includes excavation, trenching, foundations, drainage, and installing utilities (such as electricity, gas, water and sewage).

Question 2

2. What is a drainage system?

Accepted Answer

In construction, a drainage system removes surface water, foul water, or both from a site. It can include pipes, manholes, gullies, and channels connected to the mains or soakaways.

Question 3

3. What is foul water drainage?

Accepted Answer

Foul water drainage carries wastewater from toilets, sinks, baths, showers, dishwashers, and washing machines to a public sewer or private treatment system. This system is separate from surface water drainage to prevent contamination. Foul drainage typically includes soil stacks, underground pipework, and inspection chambers.

Question 4

4. What is a sustainable drainage system?

Accepted Answer

A sustainable drainage system (SuDS) is designed to manage surface water runoff in a way that mimics natural drainage. It slows water flow, encourages infiltration, and improves water quality. SuDS features include permeable paving, swales, filter drains, detention basins, and soakaways. These systems reduce flood risk, limit pressure on public sewers, and support compliance with planning requirements.

Question 5

5. What is surface water drainage?

Accepted Answer

Surface water drainage collects rainwater from roofs, roads, and paved areas. It directs water to specialised soakaways, storm drains, or attenuation systems to prevent flooding.

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Hepworth Supersleve 15° Bend Plain Ended 150mm

112mm Floplast Half Round Gutter 4000mm Black

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FloPlast Anthracite Grey 112mm Half Round Gutter External Stop End

Gutter Brush 4m

Square Downpipe Shoe 65mm White

Half Round Gutter 90° Angle Black 112mm

Half Round Gutter External Stop End Black 112mm

Hepworth Supersleve Housedrain 15° Bend Plain Ended 100mm

Wavin Osmasoil SW/S Long Tail Bend 90° 110mm Black

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Polypipe Pipe UG632 160mm Single Socket 3m

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Osma 0T332W Roundline Hopper Head 68mm (dia) White

Marley 68mm Degree Bend 67.5 Degree Black

IKO Hyload Original DPC100mm x 20m

Hepworth Supersleve 30° Bend Plain Ended 150mm

Polypipe Bend UG412 110mm 87.5deg Single Socket

Osma Roundline Pipe Bracket White 68mm

110mm Floplast Soil Coupling Double Socket Black