Dig a pit and install pump chamber
NOTICE
Ground installation (sub-surface installation): Comply with local regulations!
Civil engineering works are subject to strict local specifications. Observe the following points:
- Work may only be carried out by a trained specialist in underground and pipeline construction!
- Dig, prepare and backfill the pit
- Buoyancy safeguards
- Connection of plastic pipes
- Observe local regulations for earthworks!
- Slope angle
- Pit lining ...
- Consider frost depths!
Install pump chamber so that it is anti-buoyant and does not twist. Dig out the pit, taking the following points into account:
- Min. pit depth: Chamber height + underlay + levelling layer + height of chamber cover
- When using the chamber extension: Pit depth + 300 mm (12 in)
- Min. pit diameter at the bottom: Chamber diameter + 2 m (6.5 ft)
- Planned positions for inlet, pressure and venting line fit.
- Pump out ground water.
- Observe max. ground water level!
- Preparatory tasks completed.
- Pit dimensions specified.
- Groundwater lowering system installed.
- Filling material for underlay: load-bearing mineral mixture
- Filling material for levelling layer and for backfilling: Sand/gravel, without sharp-edged components, non-cohesive, grain size 0 ... 32 mm)
- Dig a pit.
- Professionally place and compact the underlay according to local specifications (Dpr 97 %).
- Professionally place the levelling layer according to the local specifications and level it.
- Insert the pump chamber into the pit.
- Align the pump chamber with the on-site piping.
- Vibrate the pump chamber evenly into the levelling layer.
- Check the position of the pump chamber and correct if necessary:
- Pump chamber should be vertical!
- Chamber cover flat to surface level!
- To fix the pump chamber, professionally backfill the pit in layers up to below the inlet areas. Comply with local regulations! Compress the individual layers properly (Dpr. 97 %).
- Pump chamber installed.
- Next step: Lay, prepare and connect on-site pipework to the pump chamber.