Introduction of Soak Pit Design

Design Considerations of Soak Pit Design

Health Aspects / Acceptance of Soak Pit

Operation and Maintenance of Soak Pit

Applicability of Soak Pit

Soak Pit: Need and Functions

Why Need for Soak Pit of Soak Pit Design?

Function of Soak Pit

In General, the Important Functions of a Soak Pit Are Enlisted Below:

• Soak pit serves the purpose of receiving the effluent water from the primary treatment
• Soak pit undergoes the partial treatment of the effluent water coming out of the primary treatment unit.
• The soak pit discharges clear and non-harmful water to the ground.
• The soak pit is designed in such a way that the treated water comes out of the porous walls of the soak pit.
• The soak pit helps to recharge the groundwater bodies.

Advantages of Soak Pit

• It can be built and repaired with locally available materials.
• Technique simple to apply for all users.
• A small land area is required.
• Low capital costs; low operating costs.
• Recharging groundwater bodies.

Disadvantages of Soak Pit

• Primary treatment is required to prevent clogging.
• May negatively affect soil and groundwater properties.
• Applicable only were soil conditions allow infiltration, the groundwater table is at least 5 m below the soak pit, there is no risk for flooding and any water well is in a distance of at least 30m.
• Difficult to realize in cold climate.
• Should be avoided for high daily volumes of discharged effluents.

Summary of Soak Pit

Soak Pit Construction Method

Soak Pit Design for Rainwater Harvesting

• Determine the catchment area
• Calculate the runoff volume
• Assess the soil type
• Determine the size of the soak pit
• Select the location
• Excavation and construction
• Inlet and outlet arrangement
• Backfill and cover
• Maintenance and monitoring

Residential Soak Pit Design Guidelines

• The soak pit shall not be less than 900mm in diameter& 1500mm in depth below the invert level of the inlet pipe.
• The absorption area of the soak pit could be 1 Sqm to 1.5 Sqm per head of the user.
• The soaking pit should be covered by the precast slab.

Soak Pit Construction and Design Manual

• Site Selection
• Size Calculation
• Excavation
• Perforated Chamber
• Inlet and Outlet Pipes
• Backfilling
• Ventilation
• Maintenance

Best Practices for Designing a Soak Pit

Soak Pit Design for Wastewater Treatment

• The design of a typical soak pit generally consists of a pit of approximately 1 cubic meter with a depth of 1.5m to 4m.
• It must not be constructed nearby a drinking water source as it can pose contamination of the drinking water source.

Soak Pit

Soakage Pit

Soakage Pit Design

• Site Evaluation
• Sizing the Soakage Pit
• Pit Construction
• Overflow and Maintenance

Soak Pit Size

Soak Pit Depth

How to Make Soak Pit?

• Determine the location
• Check local regulations
• Dig the pit
• Line the pit (optional)
• Create an inlet
• Add a layer of gravel
• Fill with absorbent material
• Add a layer of sand
• Cover the pit
• Maintain and monitor

What Points to Be Kept While Sighting a Soakage Pit in a Camp?

How Deep Should a Soak Pit Be?

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