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.

Compare drainage supplies and groundwork solutions

FloPlast Black 68mm Round Downpipe 67.5° Branch

Half Round Gutter Fascia Bracket 112mm Grey

Square Gutter Running Outlet Black 112mm

Half Round Gutter 4m White 112mm

Round Downpipe Connector White 68mm

Osma Squareline Outlet Adaptor-square To Round 61mm Dia White

110mm Floplast Soil Vent Terminal Grey

110mm Floplast Soil Pipe Single Socket 3000mm Black

110mm Floplast Solvent Soil Pipe Plain Ended 3000mm Black

Wavin Osmasoil Balloon Grating 110mm White

Osma 315mm Multi-base Inspection Chamber Base Inc. 2 X 45° Multi-base Branch 110mm 4D917

Osmadrain Drainage Equal Junction 45 Degree Single Socket 110mm

Osmasoil 4S589B 110mm Ring-seal Bossed Pipe Black

Wavin Osmasoil S/S Bossed Access Pipe 110mm Grey

110mm 87.5 Degree Double Socket Long Radius Bend

FloPlast 65mm Brown Square Downpipe Offset Bend - 112.5°

Aluflow Gutter Deepflow Union Powder Coated

FloPlast White Square 92.5° Offset Downpipe bend

Brett Martin 112mm Round Gutter, 4m, Black

Square External Stop End White 112mm

IKO Hyload Trade DPC Damp Proof Course 225mm x 20m

Square Internal Stop End Black 112mm

ACO Hexdrain Plastic Grating Channel 1m X 125mm Black

Hepworth Supersleve Pipe Plain Ended 150mm X 1.75mtr

IKO Hyload Original DPC Damp Proof Course 450mm x 20m

Polypipe Pipe UG432 110mm Single Socket 3m

230mm X 230mm X 150mm Concrete Gully Surround

110mm X 68mm Floplast Soil Rainwater Reducer Black

Osmasoil 4S300B 110mm Weathering Collar Black

68mm FloPlast Round Downpipe Bracket Black

FloPlast Miniflo Black Round 112.5° Offset Downpipe bend, (Dia)50mm

Aluflow Rock N Lock Black Half round Gutter Bracket

Polypipe Square 112mm Black Gutter Union Bracket

FloPlast Black 112mm Half Round 90° Gutter Angle

FloPlast Black 112mm Half Round 135° Gutter Angle

FloPlast Black 68mm Round Downpipe 92.5° Offset Bend

FloPlast Anthracite Grey 112mm Half Round Gutter Running Outlet

Brett Martin Underground 450mm Inspection Chamber Seal

FloPlast Push-Fit Double Socket Underground Pipe Coupling 110mm

Polypipe Half Round Gutter 4m Black