A suit-An onsite wastewater treatment system is a unique system that combines a septic tank and a soil absorption field. ) Provision of alternative material of magic soak pit. Reports from the field revealed that no geotechnical or water bed level testing research was done before the use of the soak pit technology. A _____ is a chamber made of concrete, fiberglass, PVC or plastic, through which domestic wastewater, sewage flows for primary treatment. This video demonstrates a practical example of how a Drainwave unit is installed in a planned absorption trench installation otherwise known as soak put cons. The wastewater can easily soak on the ground. Suppose there is no need to reuse wastewater collected from stormwater, greywater, and black water. Soak pit are best suited to soils with good absorptive properties; clay, hard packed or rocky soils are not appropriate. The sludge can safely be used as manure. 5m to 4m but never less. By utilising a soak pit, you can reduce the amount of contaminated water being released into the. Technology and Program Design 6 Legislation and Standards for Urban Sanitation 11. 0. The pre-treated effluent flows by gravity or is pumped to a leach field for disposal. If you do not register your system and are convicted, you could be fined up to €5,000. The soak away pit is of natural earth at the bottom which allows the wastewater to naturally drain the liquids down into the earth. The immersion well should be between 1. without contaminating ground water where it is extracted. A Soak Pit should be used for discharging pre settled black water or grey water . Design Considerations The soak pit should be between 1. Soak Pit Design. Splash pit is likewise an extraordinary method of gathering and utilizing stormwater to re-energize and raise the groundwater table. The majority of the wastewater management system requires a soak pit for this partial treatment. Soak Pit’s Function. then in most cases it has a septic tank system (also known as an On-site Wastewater Disposal System, or Subsurface Wastewater Disposal System) to dispose of the wastewater. Soak Pit Design. US EPA's Design Manual for Onsite Wastewater Treatment and Disposal, 1980, available from the US EPA, the US GPO Superintendent of Documents (Pueblo CO), and from the National Small Flows Clearinghouse. ; Variations: These septic information tables give typical required. of wastewater into the environment. If you do not have a central collection facility, how do you dispose of your wastewater? A = Wastewater soak away pit B = Open discharge on the surface C = Irrigate vegetables D = Others (specify)A soak pit is a covered, porous-walled chamber that allows water to slowly soak into the ground and also known as a soak away or leach pit, and the pre-settled sewage from the septic tank is release to the underground chamber from where it infiltrates into the neighboring soils. The design of a typical soak pit generally consists of a pit of approximately 1 cubic meter with a depth of 1. In areas where the ground water level below 4m a soak pit can be used. As liquid leaches from the pit and migrates through the unsaturated soil matrix, pathogenic germs are sorbed to the soil surface. As a result, smaller effluent particles settle at the bottom of the soak pit. The separate collection of feces and urine without any flush water has many advantages, such as odor-free operation and pathogen reduction by drying. inch of water to soak into the soil. Grey water; Methods. Gravel and stonebeds. Normally, the chambers are all of the same depth (between 1. The pit may be lined with stone, brick or concentrated blocks with dry and open joints. 2. The increased contact time with the active biomass (sludge) results in improved treatment. 48 KLD greywater is produced per day. . 48 KLD greywater is produced per day. Environmental Engineering/Policy Program. The outlet of the septic tank should be compulsorily connected to a soak pit. Soak Pit Soak Pit does not provide adequate treatment for raw wastewater and the pit will clog quickly. So soak pits are preferred where the soil is porous in nature. 1 Design of Decentralized Wastewater System . The Absorption area of the soak pit could be 1 sqm to 1. txt) or read online for free. The soak pit discharge clear and non-harmful water to the ground. 1. The soak pit should. The specific design will depend on factors such as the type of soak pit (e. , 2014Read- Homemade septic Tank Design! Soak Pit Size. Fill the Boulders & Gravel around the ring. Sludge volume is reduced by microbial action but still needs periodic emptying. Sewage sludge is the solid, semisolid, or slurry residual material that is produced as a by-product of wastewater treatment processes. 5 and 9. Soak Pit Type – 2 Magic Pit Perforated Concrete rings can be used in this method. It should be used for discharging pre-settled blackwater or greywater. Soak pits are used to collect water from stormwater systems and provide it with a place to sit until it can be treated by the city's wastewater treatment facility. What is the wastewater from kitchen sinks called? a) Grey water b) Black water c) Yellow water d) Brown water. Certain design mandates are to be ensured for design of soak pits s uch as the . ) and a relatively safe way to discharge it into the. 33 Soak-away - A pit, dug into permeable ground lined to form a covered perforated chamber or filled with hard-core, to which liquid is led,. Anaerobic bacteria decompose the sludge during this time, resulting in sludge. As a property owner, you are responsible for maintaining your onsite wastewater system and knowing how it works. Pre-settled effluent from a Collection and Storage/Treatment or (Semi-) Centralized Treatment technology is discharged to the underground chamber from which it infiltrates into the surrounding soil. A cesspool is a pit or underground container that collects and stores untreated wastewater until it can be emptied and disposed of elsewhere. Design considerations Toilet: The toilet should be made from concrete, fibre-glass, porcelain or stainless steel for ease of cleaning and designed to prevent stormwater from infiltrating or entering the pit 2, 3. Introduction of Soak Pit Design. The soak pit is either left empty or filled with boulders or gravel, which will help prevent walls from collapsing, but still has adequate space for wastewater. The. 8 m2 WA =Wall Area DF = Daily Flow SIR = Soil infiltration rate (See table 1). Q = 120 litre/ day; For continuous water supply. A cesspit can be used for the temporary collection and storage of feces,. The stones increase the surface area over which biological and chemical actions take place. The depth varies from 3-5m. 5 and 4 m deep3, but as a rule of thumb, never less than 2 m above the groundwaterIt is not designed to handle sewage or wastewater. The soak pit should be kept away from high-traffic areas so that the soil above and around it is not compacted. Dimensions: 1. 5 to 3 yrs. . The retention time is the duration for which the wastewater remains in the septic tank for treatment before it overflows to the soak pit or drainage field. If there is no intention or need to reuse wastewater, collected rainwater or gray water, immersion pits can offer an economic opportunity for partial treatment of waste-water or ash from a primary treatment (eg septic tank, double pits for flush toilets, biogas collector, deflector anaerobic reactor, etc. They depend on soil with a sufficient absorptive capacity. Design Considerations: Capacity of septic tank: Capable of storing sewage flow during detention period &extra. Ltd. Soak Pit Design. Key Words: Magic Soak Pit, Disposal, Unhygienic Condition Wastewater, Groundwater Recharge. Civix is a team of designers, engineers, and support staff who specialise in designing and installing soak pits. The size of soak pits isScheme of a cesspit that is constructed like an underground holding tank. A cesspit is technically a wastewater device, although the terms are often used interchangeably Catchment Area Describes an area of land where the stormwater runoff would flow to a discharge point at a watercourse or the sea. 2. Design. wastewater treatment systems. In areas where the ground water level below 4m a soak pit can be used. 5 to 2. The depth of the soak pit varies between 120cm to 180cm. It essentially consists of a single. _____ should not be placed near water body. The wastewater can easily soak on the ground. The soakfield providesSTORAGE TANK DESIGN AND CONSTRUCTION GUIDELINES rev. Septic Tank Functions of a Septic Tank The septic tank provides a number of important functions in terms of physical and biological changes. To study the advancement the design of soak pit. It is different to stormwater, which is rainfall collected in gutters from roofs and roads and usually flows untreated into a nearby waterway or soak pit. To provide effective drainage for areas that flood. Introduction of Soak Pit Design. Figure 6. This Code is dictated by the Bureau of Indian Standards, and ensures that the sewage is treated in a way that maintains health and hygiene of the community. 1 Fate of carbon and energy in aerobic (above) and anaerobic (below) wastewater. 3. hydraulic conductivity of the soil. Soak Pit Construction / How to build a soakaway. What you need to know about Soak Pit. DEWATS (Decentralized Wastewater Treatment System) is a wastewater treatment system that is both cost-effective and efficient, especially in poor nations. Loose brickbats are laid at the bottom to improve the soaking quality. 3. Design Considerations. But the partial treatment of effluent water through a soak pit is a. IV Soak Pit Design: The soak pit, consisting basically of a simple pit (generally approximately 1m3), should be between 1. The wastewater generated in houses like water used for bathing, washing clothes and utensils is commonly disposed in this pit. A Soak Pit does not provide adequate treatment for raw wastewater and the pit will clog quickly. A layer of sand and fine gravel is spread across the bottom to help disperse the flow. Soak pits are very low in cost for construction, operation and maintenance. The Soaking pit should be raised above ground level and surface water should not enter into the soak pit. wastewater. IMPORTANT: This is the surface area of just the sides of the pit. A new on-site design should be able to function within the limited space limitations, which are often not sufficiently addressed by the current sanitation policy. The soak pit is constructed with brick masonry in the shape of a square or circle. Infiltration and soakage trenches are often encountered at the end of a treatment train, or where they receive relatively. It should be remembered that the depth should not be taken below the water table; The diameter of the pit depends on the volume of effluent and the. The. The Soaking pit should be raised above ground level and surface water should not enter into the soak pit. 6 L / 100 kg wt. Between 55 and 75% of the home waterThe objective of this lecture is to introduce the fundamentals of hydraulics for the simple design of water supply and sewer pipes (see also [7242-water distribution pipes]). The pre-settled sewage from the septic tank is released to the underground chamber, where it infiltrates into the neighboring soils. Waste water from our homes includes water from toilets, sinks, bathrooms, dishwaters and washing machines. For safety, an excavator (backhoe) is usually used to dig the pit to five-feet. In most cases, this is a disposal field. The length of the tank is usually 3 times the width. Please like,share,comment & subscribe my channel,,for support !!!!! This video is about design of Septic tank & soak pit for any nos of people. These can be lined (like a well) or unlined and filled with rocks. 2. residential soak holes. A Soak Pit should be used for discharging pre settled black water or grey water . 50m from water abstraction points, boreholes, springs. Once that water has been used in your bathroom, kitchen, laundry and outside, it flows out through private plumbing into the public wastewater network. 3. The soak pits work with a simple process of filtration that helps in treating the wastewater and in. 1. R. A soak pit does not provide adequate treatment for raw wastewater and the pit will quickly clog. 1. It should be located at a safe distance. Today I'm going to show you Exactly how to build a strong Soakaway pit or leachpit or soakpitIs a flooding Bathroom dangerous?Yes If the Bathroom over floods. 0. About this Guide i Guidelines for on-site sewage systems in the Wellington Region ABOUT THIS GUIDE This Guide has been prepared for staff of Wellington Regional Council and the territorial authoritiesFurther, let if you have to design a septic tank for 20 users then how will you do the design of septic tank calculation? Let us, do it. 1. Compared to a soak pit, the leach field might be somehow safer, but is considerably more sophisticated in its construction. 5. 1. 5 MB) Provides technical information about onsite wastewater treatment and disposal systems. 6 of Clause E1 of the NZ Building Code to ensure that surface water is discharged without overflowing. 38 times the volume of the hole. Soil absorption system Seepage pit or soak pit: unlined and filled with stone or brick 50 SEPTIC TANK 51. The design of CW is explained in section 4. Unlike the drywell described just above, in this septic effluent waste disposal, including black water and gray water, wastewater leaves the building through a. If the percolation rate is too high, the wastewater might drain into the. Very low on cost and a simple design for on. It assists in gathering and securely getting rid of wastewater outside of the home. Q = 120 litre/ day; For continuous water supply. The majority of the wastewater management system requires a soak pit for this partial treatment. Social Considerations. While the first standard for small septic. Unit Operations for Aerobic attached growth and aerobic suspended growth wastewater treatment processes are the. Water races: While not a drainage function, the. - 52 Sec- A. The filled up pit can be conveniently emptied after 1. The solids settle to the bottom, where microorganisms decompose them. The wastewater generated in the. However, Distance between the bottom of the soak pit and groundwater level is 6’7″ and more. Wastewater composition refers to the actual amounts of physical, chemical and. As part of a full drainage system it is an efficient and low environmental-impact way of dealing with surface water (also called runoff, rain water or storm water). A soak pit – also called a soak away or leach pit – can be. pit, mouth exposed at ground level. (ii) Discharge into other soil absorption systems as soak pit or seepage pits and leaching cess-pools. at community level as a measure for management of the greywater generated. The soak pit must be constructed where the site does not gather surface ruff off the water, which leads to clogging of the soak pit resulting in water stagnation. Also study identifies that the magic soak pit method is unhygienic the wastewater in rural areas is disposed off on open and safe to dispose the wastewater. Septic Tank Septic tank is rectangular in plan and constructed with brick masonry over a concrete foundation. 5 and 4 m deep, but generally speaking, never lower than 2 m above the water table. Thus, one of the two pits is to be used alternately. Where a soak pit is required, a building consent application with calculations for soak pit sizing must be approved by the building consent authority. The septic tanks are designed for foul sewage ( containing fecal matter and urine ). There are five pieces of information that must be considered to design a soak pit or infiltration trench: ` Key Information Needed for Soak Pit and Infiltration Trench 1. A Soak Pit does not provide adequate treatment for raw wastewater and the pit will clog. Q is the rate of water supply. AdvantagesS. A Soak Pit does not provide adequate treatment for raw wastewater and the pit will clog quickly. A soakaway system normally includes screens, a catch pit, a septic tank, soakaway pit and trenches, and the associated dung channels. It provides guidance on: 1. Critical design parameters include a hydraulic retention time (HRT) between 48 to 72 hours, up-flow velocity of the wastewater less than 0. The scum, composed of waste that’s lighter than water, floats on top. 1 FOR DETAILED SEPTIC TANK DESIGNThe “Soak Pit” or Soakage Pit or well is an area located slightly away from the septic tank. They work by allowing bacteria, fungi and micro-organisms to breakdown, digest and clean the waste water to the point where it can be safely discharged. SO. . Adequacy. Health Aspects. Soak pit are best suited to soils with good absorptive properties; clay, hard packed or rocky soils are not appropriate. •Septic tanks can be made from concrete. A Soak Pit does not provide adequate treatment for raw wastewater and the pit will clog quickly. During this time period, the sludge was decomposed by the biological action of anaerobic bacteria and the solid waste settled down as sludge. Let take @120 liters per user as i have told you to consider above. 7% in percentage terms (CPCB, 2021 ). 1. Hospital wastewater may contain various potential hazardous materials including, microbiological pathogens, radioactive. What is an On-site Wastewater System? An On-site Wastewater Disposal System collects, treats and. Combined systems. Based on this 24. Soak pits are appropriate technology for rural and suburban areas. The pre-treated wastewater from the Imhoff tank requires a secondary treatment (e. , 2014). A complete sewage treatment plant will need a septic tank, collecting all the waste from the house (grey and black water) and allowing solids to settle out before the liquid passes to the reed. 1. The immersion well should be between 1. A sewerage system, or wastewater collection system, is a network of pipes, pumping stations, and appurtenances that convey sewage from its points of origin to a point of treatment and disposal. 5 and 4 m deep, and not less. This urine stream contains about 80% of the N, 56% of the P and 63% of the K found in domestic wastewater [18]. The design of the community soak pit is according to the population of village. January 13, 2021 Drainage. Depth should be between 1. details a suggested design approach complete with worksheets and design charts to assist applicants to determine which stormwater soakage system should be adopted. 50 and 2. Define. The objective of waste water treatment is to remove polluting material so that the treated water can be released safely back into the environment. Design Considerations of Soak Pit Design. It should be located. Advantages a Table of Contents Soak pit: Design Procedure of Soak Pit|Advantages and Function of Soak pit What is Soak pit? A soak pit is also known as the soak way is a covered porous walled chamber that allows water to slowly soak into the ground. You can register and pay online at protectourwater. Summary of design criteria; (d) The location of and use of the ‘reserve area’;. 5 and 4 m deep, but as a rule of thumb, never less than 2 m above the groundwater table. The Waimakariri District Council has responsibility for the following functions: Urban stormwater. To replenish the water table by absorbing rainwater. It should be. 0 m = 15 m 2. Design Considerations of Soak Pit 1. it then goes directly to the soak pit, which is the last chamber of the biodigester. A soak pit is frequently offered for such partial treatment. CAPACITY OF SEPTIC TANK:-capable of storing sewage flow during detention period &extra volume of sludge for . . Scientifically design septic tank involves two or three chamber with an inlet to collect liquid wastages from pour flush cistern and outlet to expel the effluent to soakage pit or sewer. The discharge of domestic wastewater into or on to land from an on-site wastewater treatment and disposal system lawfully in existence at the time that this rule comes into effect is permitted provided: (a) The design flow shall be no greater than 2 m3/d. •The flow and characteristics of the wastewater that can be considered for design of septic tank is presented in the Table. In this study, the wastewater collected from a septic tank is passed through a partially converted anaerobic filter, and a vertical flow constructed wetland (VFCW) before being sent to a soak pit. Both the Horizontal and Vertical type Soak Pits are efficient Grey water treatment methods suitable for treatment of Grey Water generated from HHs and places with SpaceDesign Considerations. Applications of Soak Pit: The soak pit doesn’t provide adequate treatment to the raw wastewater and may get clog really easily. hold point – the contractor shall carry out soakage testing in accordance with the auckland soakage design manual at the proposed soakage pit location with the engineer in attendance. ) and a relatively safe. 150mm. The effluent may be disposed of in a soak pit. Please like,share,comment & subscribe my channel,,for support !!!!! This video is about design of Septic tank & soak pit for any nos of people. Soakaway Pit:- Means any pit or any other underground construction designed for seepage of the treated wastewater into the ground by infiltration or percolation. Keep it. NOTES 1. However,. 6). Utilizing such Key Words: Magic Soak Pit, Disposal, Unhygienic ConditionAll privy closets, privy pits or vaults, cesstanks or cesspools now in use are hereby declared nuisances, and the same shall be thoroughly emptied, cleaned and disinfected and filled with clean earth. 2. in consultation with the community leaders, can design and implement a solution. The soak pit should be kept away from high-traffic areas. Detention period = 24 hour. Septic tank process&design - Download as a PDF or view online for free. 2 Residential Wastewater Characteristics 50 4. It essentially consists of a single. The method used is not only disposes the wastewater but also increases the ground water level. In the following information we will be focusing on the city of Auckland which is the most populated and quickest growing region in New Zealand. Wastewater composition refers to the actual amounts of physical, chemical and biological constituents present in wastewater. coarse material. When the second pit is full, the first pit should be used by diverting the discharge from second to first pit. 12 X 20 = 2. that subchapter discussing the design and use of seepage pits for onsite wastewater disposal is published as a separate web page. It is a type of soil absorption system - a smaller version of leach fields and is suitable for treating and disposing of small effluent discharges wherever a. 5 and 4 m deep, but generally speaking, never lower than 2 m above the water table. When wastewater is discharged into a soak-pit, it slowly soaks into the ground. Total Septic Tank Capacity = 2000+300 = 2300 Liters. When wastewater passes through the septic tanks, heavier solids sink to the bottom and undergo bacterial digestion. It serves the function of letting the. 10. The soak pit serves as a receiving container of the effluent water from the main treatment unit, Soak pit performs partial treatment of the wastewater coming out of the main treatment system. This IS Code provides various requirements that have to be met while constructing a septic tank, so that it meets minimum standards. The Auckland Unitary Plan provides guidelines for the design and construction of soak pits. Technology and Program Design 6 Legislation and Standards for Urban Sanitation 11. A Soak Pit is a very low-cost and low-tech solution for discharging wastewater. Wastewater from the primary treatment unit will not be reused. Cesspit, cesspool and soak pit in some contexts are terms with various meanings: they are used to describe either an underground holding tank (sealed at the bottom) or a soak pit (not sealed at the bottom). Capital: R7 000-R8 500. fAAETI. These tables do not cover all possible options. 12. A Soak Pit does not provide adequate treatment for raw wastewater and the pit will. In areas where the ground water level below 4m a soak pit can be used. In addition, wastewater treatment plants could become net producers of energy instead of energy consumers by. if possible to avail for both sewage/domestic water. A sullage pit keeps the wastewater in one place and encourages it to soak quickly into the ground. 12,78,379 household and community soak pits. 5-4 m, depending on the anticipated volume of urine and the. Prior two are of rectangular shape and later is generally of circular shape. All onsite wastewater systems need to dispose of the water used in your home. 1 Estimating of septic tank, soak pit. Soak Pit – Need and Functions. Part one of this manual provides a description of the design of WSPs, while Part two provides a detailed description on the. Aggregate: 20mm coarse aggregate & fine aggregate = sand. a) drainage tank. Calculate: A sp (area of base of soak pit) = 5. 5 m, and it must be located at least 10 m away from any water-bound bodies in saturated soil conditions. It serves the function of letting the wastewater coming from the septic tank to slowly soak into the underlying ground. Its primary function is to allow wastewater to gradually percolate into the surrounding soil, where natural processes help treat and filter the effluent before it. The shape and design is similar to those of a water well, but dry wells are filled with gravel, or surrounded by gravel, and usually covered from sight. Detailed characterization data regarding. The soak pit should be between 1. The length of the septic tank should be 2 to 4 times the width. The wastewater generated in the house from the kitchen and […] A soak pit is frequently offered for such partial treatment. Part B. August 23, 2022. the wastewater to pass through. Septic tanks may be appropriate for situations where the volume of wastewater produced is too large for disposal in pit latrines and water-borne sewerage is uneconomic or unaffordable. The essential functions of a septic tank are: • To collect. Malik Enroll- 190/11 Roll no. Q = 80 litre/ day ; For intermittent water supply. These tables do not cover all possible options. . A factor of safety of 0. It collects excess water and allows it to naturally percolate into the surrounding soil, preventing waterlogging and reducing runoff. drainage of roading or driveways. Soak pit are best suited for soil with good absorptive properties; clay, hard packed or rocky soil is not appropriate. This filling can also replace the lining, by supporting the walls from inside. 5 and 4 m d eep but, as a general rule,. In areas where the ground water level below 4m a soak pit can be used. 15 There shall be no physical connection between a public or private potable water supply system and a sewer. Liquid fraction seeps into the subsoil while solids left in the pit undergo decomposition by the. Giving customers a chance to treat Design of an 8-Person Soak Pit wastewater partially at a low cost. A Soakage Pit is a covered, porous-walled chamber that allows water to slowly soak into the ground. between 1. 20m(B) x 1. Total Accumulated Sludge = 30 litres x 5 persons x 2 years = 300 Litres. Soak pits or infiltration trenches that intercept the water table will fill rapidly and are unlikely to cope with large volumes of wastewater. Deep pits can last up to 20 or more years. INLET AND OUTLET TEES. Capacity testing and policy applicable to vertical seepage pits. ie. Pre-settled effluent from a collection and storage/treatment or (semi-) centralized treatment technology is discharged to the underground chamber from which it infiltrates into the surrounding soil. 1. The rainfall intensity used in the design of the soak pit shall be that of an event having a duration of '1 hour and a 10% probability ofAbstract. Therefore, it is necessary to remove the settled sludge after 1 or 2 years. Considering a 1 hour 50-year storm in Hamilton will generate approximately 490 litres of water from 10 square metres, the volume of water used in the pre-soak seems disproportionately large to the scale of the test. 6 Sludge - Sludge is the settled solid matter in semi-solid condition. The following applies to all septic tanks regardless of material. In that case, soak pits can offer a cost-effective technique for partial treatment and a comparatively safe approach of discharging it to the. The solids being heavier than thePits prepared within the absorption area often settle after the system has been installed and may disrupt the distribution network. TREATMENT OF HOSPITAL WASTEWATER Name- Tabish. REFER TO ANNEXES 5 AND 5. But these guidelines are only suggestive, not binding. 5 and 4 m deep, but, as a general rule, never less than 2 m above. Soak pit design must consider providing a removable lid at the top for any future maintenance work. a Table of Contents Soak pit: Design Procedure of Soak Pit|Advantages and Function of Soak pit What is Soak pit? A soak pit is also known as the soak way is a covered. As wastewater (greywater or blackwater after primary treatment) percolates through the soil from the soak pit, small particles are filtered out by the soil matrix and organics are digested by microorganisms. Soak Pit: A soak pit is a dug-out pit that is filled with graded stones and gravels. wastewater treatment systems. The soak pit should be. T he budget of soak pit is around 2000 rupees for each soak pit and constructed within two days with the help of two workers. Soak Pit Design. INLET AND OUTLET TEES. The procedure for the removal of the sludge has been elaborated. To detect the impact of soak pits on the environment, a survey was conducted by collecting Septic tank effluent fromdesign approaches detailed by D. Certain design mandates are to be ensured for design of soak pits such as the depth of the soak pit should be between 1. Sewerage systems. Again the sampling was purposive to ensure that septic tanks with soakaway pit are included but at the same time ensuring uniform spatial distribution of the tanks (Map 2. 11. Soak Pit Design What is a Soak Pit? : A soak pit which is also called a soakaway is a closed porous wall chamber that is primary design to allows water to slowly soak into the ground. size should be as per requirement. septic tank, twin-pits for pour-flush toilets, biogas settler, anaerobic baffled reactor, etc. A soak pit is known as soak way or leach pit, is a covered, porous-walled chamber that allows water to slowly soak into the ground. In a conventional septic tank system, also called ‘septic system’, a subsoil dispersion system such as the soak pit or dispersion trenches follow the septic tank.