The depth or height of Septic tank is in between 1. number of persons that the unit is designed to serve. a soakaway (designed for draining rainwater. The following points offer a quick overview of the main rules for septic tanks: Tank must be rated to BS EN 12566-1 standards. A Septic Tank, typically underground, for collecting sewage and allowing it to decompose through bacterial activity before draining. 12 Component requirements; 5. A soakaway is a drainage system in Scotland NG33 4 which involves digging a hole in the ground and it filling with rubble. For ease, we have created a simple table. When installing the tank, the lid is filled with concrete prior to use to ensure it stays closed off. 50 DIAMETER OF SOAKAWAY (METERS) 3. on-site sanitation facilities such as pour flush toilets discharging to leach pits or septic tanks. 5. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. 25. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. Length of Septic tank = (4/5) x. They comprise an underground tank for anaerobic treatment followed by a soakaway tank or pipe system to encourage effluent flows to percolate into the. So if you want to: Know the rules and standards; See how to undertake a soakaway test; Design a soakaway;. For over 27 years, I’ve enjoyed positive working relationships with clients and Health Departments in 30 counties in Indiana. 4268/175 = 24 lengths of rod. Here is another type of soakaway design. Septic Tank Regulations in Elgin -. solids and organics, but the treatment. This allows rain water to gradually filter through the surfacing and go back in the ground. It is best to construct a single compartment for small capacity septic tanks. Septic Tank Regulations in Moat -. org #2 Power Lane, City of Belmopan. The minimum width of a septic tank is 600mm and the depth should be 1225mm including a freeboard of 300mm from the water level. See more ideas about septic tank design, septic tank, sewage system. l pp %$56 at 200mm c/c. Septic tanks must be constructed to standard design. Soakaway Design in Crawley. 2022. Soak pits are not suitable if. The discharge to the watercourse stopped and diverted to a drainfield, designed and constructed to the current British Standard 6297:2007. For more details on the design and construction please see this article. Because they are outside, leaves, twigs, grit and litter can accumulate and block the pipes, or prevent the water from draining efficiently. Septic tank suppliers, installation, septic system and soakaway problems for the home owner explained. 3. A drainage field is a specifically designed arrangement of perforated pipework, laid in trenches to allow the effluent to filter into the ground. Soak pit is not suitable for clod climate areas. Septic Tank Design 2-3 Chambers. Soakaway Design in Boston West. 4m above the tank bottom. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. Any plant, or conversion system, which does not have the EN12566-3 Certificate is not allowed to be sold. Cesspit Septic Tank - How it works - Design. Soakaway Pit Design. (i) satisfy the regulations set out in Part P of the National Building Regulations and Building Standards Act; and. 15 There shall be no physical connection between a public or private potable water supply system and a sewer. Soak pit construction can be done using locally available materials. to soakaway pits outlet to soakaway pits section a-a manhole 600x500mm with c. Step 4: Round the number up to the nearest available septic tank size. There are all details about the Septic Tank, Plan, Cros Section, Foundation, levels, manhole covers etc, So We hope this Septic Tank details also will be useful for you. efficiency is only moderate (referred to as. Soakaway Design in Cambridge. a washwater usage rate of 15L/pig/day. l f. Soakaway designs are crucial in Pensilva PL14 5 to ensure water is able to filter through the surfacing and head back into the environment. e. Septic tanks shall be fabricated or constructed of concrete, fiberglass, thermoplastic or an approved material. The septic tank wall thickness should be a minimum of 230mm and the. The discharge might negatively affect the groundwater and soil properties if the effluent is highly toxic. The well-established brand name, RotoTank™, has outlasted its no-nonsense 10-year warranty over and over. A soakaway is used for rainwater or stormwater, a drainage field is used for wastewater (cleaned sewage, or effluent. This allows rain water to gradually filter through the surfacing and go back in the ground. Soakaway Design in Stafford. This is a great way for both domestic and commercial buildings to drain the. Home. The design of the septic tank is based on factors such as the . 35. This is to ensure that the land (soil) is suitable for a soak away, and to ensure that the soak. A soakaway is a drainage system in Flintshire LL12 9 which involves digging a hole in the ground and it filling with rubble. Soak Pit – Need and Functions. Thanks for the replies. The “Regulations for Septic Tanks and Holding Tanks” issued by previous Ministerial Decision Number 5/86 and all those contradicting with this Decision or contravening its provisions shall be considered void. There are a few subtle yet important differences between septic tanks. while A Soak Pit or a soakaway is a closed chamber directly connected to a septic tank. This ensures that there is uniform ponding and infiltration across the base of the soakaway. While they may be effective for managing stormwater runoff, they do not filter or treat effluent, which can be detrimental to groundwater. So here are the Typical Details of Septic Tank and Soakaway form the dwgnet. Soakaway Design in Boston. This regulation is promulgated pursuant to the Wyoming Administrative Procedures Act, W. Under-sizing your septic tank will result in the water produced being high in suspended solids and risks blocking your soakaway. Information on design and functional aspects, and environmental effects of septic tank systems are presented. Q = 80 litre/ day ; For intermittent water supply. Soakaway Design in Chadbury. 3. Ensure access for emptying of septic tank, as well as availability of sludge treatment and disposal. If building one’s own tank from brick the walls should be at least 230mm thick, and. Excavators value my designs because it makes their jobs easier. Soakaway designs are crucial in Bridge CT4 5 to ensure water is able to filter through the surfacing and head back into the environment. Septic Tank with No Soakaway. The remaining liquid drains from the tank by an outlet pipe and soakaway. BOX 1923, 41185 DODOMA A soil percolation test is required to be carried out on the land where the septic tank or treatment plant soak away is intended to be built. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. Septic Tanks. Septic Tank Regulations in Dyke -. 18 9180 1. The following points offer a quick overview of the main rules for septic tanks: Tank must be rated to BS EN 12566-1 standards. Soakaway Design in Camborne. A septic tank takes raw sewage in, allows the solids to settle (sludge) and allows the remaining liquid to flow into the surrounding soil by means of a soakaway. Septic Tanks and Soakaway Page 11 ANNEXURE 1 – SABS 0400-1990 Tables 1, 2 and 3 ANNEXURE 2 – Diagram of a Concrete Septic Tank. Soakaway Design in Carburton. This allows rain water to gradually filter through the surfacing and go back in the ground. This totally depends on the size of the soakaway pit and the bar spacing. Soakaway Design in Chesterfield. What Is the Design of a Septic Tank? A septic tank must be designed with acid-resistant inlet and outlet baffles or tees, inspection pipes at least 6 inches in diameter over both inlet and outlet, and an access manhole at least 12 inches in diameter. i light duty cover from septic tank outlet 225mm blockwork wall soakaway pit plan r1250 225 100 500-800 8000 gravel fill max. 10 Septic tank outputs; 5. 2. A septic tank soakaway drainage field system performs two functions:-. Soakaway Design in Beer. septic tank, twin-pits for pour-flush toilets, biogas settler, anaerobic baffled reactor, etc. Soakaway problems, blocked or needing replacement? We carry out all works relating to Drainage Fields, Rainwater and Sewage Treatment Plant Soakaways. A soakaway is a drainage system in Clacton-On-Sea CO15 3 which involves digging a hole in the ground and it filling with rubble. As an aid, mark a stick 300mm from one end, place in the hole and fill up to the mark. Soakaway designs are crucial in Causeway NP26 3 to ensure water is able to filter through the surfacing and head back into the environment. How to Build a Soakaway. Fill with water to depth of 300mm. RELATED: 10 STEPS TO OWNING A HOME IN KENYA. See our 100 reviews on. com Excavate a hole 300mm square to a depth 300mm below the proposed invert level of the soakaway pipes. Septic tank and absorption pit. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. Soakaway designs are crucial in Boston PE21 9 to ensure water is able to filter through the surfacing and head back into the environment. 3. This allows rain water to gradually filter through the surfacing and go back in the ground. It is a test that determines the rate in which soil absorbs a known volume of water. 5 feet wide, 8 feet long, and 6 feet tall. This article and its tables explain how to determine the size and design of a septic leachfield or soakaway bed or drainfield. Replace you old sewage system and install a new one the cost of £8,000 – £12,000. Tel. Soakaway designs are crucial in Carburton S80 3 to ensure water is able to filter through the surfacing and head back into the environment. Call us today on 059 915 9830. The design and construction of septic system drainage fields must be carried out by qualified and competent contractors. Soakaway designs are crucial in Oxford OX1 3 to ensure water is able to filter through the surfacing and head back into the environment. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. #septictank #septictanksoakaway #soakawaypitSoakaway Design in Puddle. A soakaway is a drainage system in Shropshire SY13 2 which involves digging a hole in the ground and it filling with rubble. com. Soakaway designs are crucial in Hastings TN34 2 to ensure water is able to filter through the surfacing and head back into the environment. The recommended size of a septic tank is a function of the volume of wastewater it receives. Septic tanks come in many shapes and sizes. What is a septic tank or treatment plant drainage field/soakaway used for? A septic tank feeding to a drainage field (also called a land drain) A drainage field is used to dispense liquid waste from a septic tank or treatment plant. However, this is not mentioned in the 2010 Building regulations guide. A soakaway is a drainage system in Lowestoft NR33 0 which involves digging a hole in the ground and it filling with rubble. O. This technique can be used in a rural or suburban area where a proper drainage system. ) Design Considerations: (a) Sufficiently large to provide a minimum capacity for 3 days' storage of wastewater. There are different types of septic tank soakaway, and in some cases, this element to your septic system can be the cause of. Raw sewage has 300 parts per million (ppm). Septic codes typically specify design flows of 100 to 150 gallons/bedroom/day (378 to 568 liters/bedroom/ day), or 75 to 100 gallons/person/day (284 to 378 liters/person/day), with. The EN12566-3 is also required for CE marking, and CE marking is mandatory in the UK. A septic drainage field (or foul water soakaway system) enables effluent discharge from septic tanks and sewage treatment plants to be dispersed through the ground and consists of a series of perforated pipes laid in an arrangement of trenches situated beneath a soft landscaped area (i. Routine maintenance of pipe network essential. These tanks can be used to store and release the effluent at a controlled rate, helping to prevent overloading and failure of the drain field. You're not allowed to use. Cesspit Septic Tank - How it works - Design. KoroSan Guideline #3 Septic tank construction using concrete blocks 5 above daily volumes may be significantly higher. In terms of other jobs, installing a new soakaway drain beneath a lawn would cost between £580 and £840. How a septic tank system works. It is a vital step to take before installing soakaways or septic tanks and in its most basic form involves digging a hole or series of holes near where you want to position your drainage system and filling it with water. 2 is about the disposal of septic tank effluent. The number of bedrooms and number of people in your home will determine the dimensions of the septic tank you need. 35 metres, and the operating depth should be 1 metre. This allows rain water to gradually filter through the surfacing and go back in the ground. Q = 120 litre/ day; For continuous water supply. Drawing title 24 APRIL 2018 DCNM STANDARD DESIGN FOR COUNCIL LEVEL HOSPITALS IN TANZANIA JCR STP. Size and Capacity. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. A cesspool is a sealed tank connected to. A septic tank is a system that collects and treats wastewater from a property. compliance with Building Regulations or BS 6297 regarding soakaway design; and complying with British Water’s advice regarding de. A soakaway system normally includes screens, a catch pit, a septic tank, soakaway pit and trenches, and the associated dung channels. Tanks that must be installed partially in the groundwater or subject toA soakaway design that ensures you have a SUDS (Sustainable Urban Drainage System) compliant system in place that can remove water efficiently and in an environmentally friendly way. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. Soakaway Design in Midlothian. Each Brett Martin crate measures 1200mm long, 600mm wide and. A soakaway is a generic term often used to describe anything which takes the wastewater from a septic tank or sewage treatment plant. Soakaway designs are crucial in Scotland DE73 8 to ensure water is able to filter through the surfacing and head back into the environment. septic tank soakaway crates - septic tank soakaway cratesyou looking for a septic tank soakaw. 11 Surface water soakaways; 5. Larger capacities are the best fit for a two-compartment tank. 1. Design the septic tank soakaway to avoid blockages The design of a foul water drainage system means that blockages should not occur if the system has been installed properly. Construction development of a septic tank and absorption well design. 01. uk create new email Additonally you can find help on the Government website: opens in a new window Rules About Septic Tanks And Soakaways. You must ensure there is a 2m gap between your trenches. the septic tank must. 40 2. 5K subscribers Subscribe 94 7. The height of the inlet pipe should be 1. A soakaway is the drainage system used to discharge wastewater from a private sewage system like a septic tank or domestic. A ground assessment and soil percolation test should be carried out to determine. Sewage generation = 85 % of water supply. Soakaway designs are crucial in Lower Swell GL54 1 to ensure water is able to filter through the surfacing and head back into the environment. Quoting the EPA manual: Most onsite code requirements for system design of residential dwellings call for estimating the flow on a per person or per bedroom basis. 3. 80 3. 3. Soakaway designs are crucial in Bagshot GU19 5 to ensure water is able to filter through the surfacing and head back into the environment. The length of a rectangular septic tank should be 2 to 4 times its width. Septic Tank Soakaway. Our Septic Tank system incorporates a 3-stage tank with three. This allows rain water to gradually filter through the surfacing and go back in the ground. When installing the tank, the lid is filled with concrete prior to use to ensure it stays closed off. Soakaway designs are crucial in Camborne TR14 7 to ensure water is able to filter through the surfacing and head back into the environment. Example B: 4 Bedroom + 5 Bedroom = 12 people: 12 x 150 = 1800L = 2000L = 3800L. A drainage field is constructed with slotted 110mm drainage pipe (not flexible land drainage pipe). On average, you’ll pay about £3,700 for the supply and installation of a 2,800 litre septic tank. 3. Care should, therefore, be taken to fix any leakages to avoid excess burden on septic tanks and subsequent land treatment systems. Septic tank cost: $1,500-20,000 (CAD 1,900- CAD 25,800) Labor cost: $1,500-$4,000 (CAD 1,900-CAD 5,100) Drain field replacement: $1,000-$5,000 (CAD 1,300-CAD 6,500) The wastewater your household creates is full of dangerous bacteria. This totally depends on the size of the soakaway pit and the bar spacing. 70, pp. This allows rain water to gradually filter through the surfacing and go back in the ground. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. GET IN TOUCH What is a Soakaway? A soakaway is a drainage system which involves digging a hole in the ground and it filling with rubble. How does a Septic Tank System (STS) work? 4. Use septic-safe toilet paper. Here are the steps to design a soak pit: Determine the size of the. The design should include components such as the septic tank, distribution box, and drain field layout. This allows rain water to gradually filter through the surfacing and go back in the ground. As part of a septic tank system, the soakaway treats the effluent. In the sketch shown here, effluent is discharged to the septic mound by a pumping chamber. Naval architecture ship design for marine engineers (152) Power transmission and. not good. The design of a foul water drainage system means that blockages should not occur if the system has been installed properly. The Importance of Maintenance 6 08. A standard septic tank in Nigeria is 8 by 10. The soakaway should not be located within 10m of potable water supplies in order to avoid possible cross-contamination. Soakaway Design in Norwich. Soakaway designs are crucial in Chesterfield S41 7 to ensure water is able to filter through the surfacing and head back into the environment. A soakaway is a drainage system in Tyrell's Wood KT22 8 which involves digging a hole in the ground and it filling with rubble. SEPTIC & SOAKAWAY PIT President's Office, Regional Administration and Local Governments. Size 619,3kB • from 26. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. 2000gal 1 compartment septic tank. This video will show you just how easy it is to construct a soakaway pit. How to construct a septic tank soakaway. Soakaway designs are crucial in Nottingham NG7 6 to ensure water is able to filter through the surfacing and head back into the environment. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. Where practical the soakaway should be. Soakaway Design in Spalding. A soakaway is a drainage system in East Sussex BN26 6 which involves digging a hole in the ground and it filling with rubble. SEPTIC & SOAKAWAY PIT President's Office, Regional Administration and Local Governments. A Sewage Treatment Plant can discharge directly to a drainage ditch, watercourse or river. Septic Tanks and Soakaway Page 11 ANNEXURE 1 – SABS 0400-1990 Tables 1, 2 and 3 ANNEXURE 2 – Diagram of a Concrete Septic Tank. Soakaway Design in Brentwood. 40 1. table of contents scope. Soakaway Design in Winchester. of users All wastes TABLE 2 SOAKAGE PIT SIZES TYPE B 5 85 75 All wastes No. Design The design of a septic tank aims to: • produce a tank in which wastewater is contained for long enough for the maximum removal of suspendedNanotech Water Technologies has always been very responsive to all requests and forever eager to improve and simplify our processes and standards. S. EN 12566-1:2000. This allows rain water to gradually filter through the surfacing and go back in the ground. The owner must provide all septic tanks as part of the owner’s infrastructure works. Soak Pit The Soak Pit which is also called the soakaway or soakage pit is a closed rectangular or circular, covered. RAJPUT, V. If your kitchen sink is fitted with an automatic waste grinder these volumes should be increased by 30%. No of persons per family = 6 nos. Septic Tank Regulations in Omagh -. how to construct a soakaway pit - septic tank soakaway constructionvideo will show you. Sokoine Building, P. If it is, then it means that the groundwater underneath your soakaway is abstracted via a borehole somewhere and used for drinking water You will not be allowed to pollute it with sewage effluent bacteria and viruses from a septic tank or. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. Size Of Soakaway and Septic Tank. Soakaway Design in Omagh. A septic tank soakaway is used to safely drain off treated wastewater, thus allowing the effluent level in your tank to remain constant, leaving remaining organic solids to degrade with the help of bacterial breakdown. Soakaways also. septic tank soakaway kitsyou need to install a new septic tank and soakaway? Would you like a s. 80 15 35 65 10 15 Percolation factors 4. 6m (3m long, 3m wide, 3. Septic Tank Soakaway Design Guide. The remaining treated middle layer of effluent exits the septic tank into a soakaway of small chips or stones. You can read more about the legislation change and what it means in our Guide. The minimum size of any distribution pipeline shall be 100mm. Many peoples are asking details about the Septic Tank and Soakaway pits. Soakaway Design in Hythe. Soakaway designs are crucial in Stafford ST16 3 to ensure water is able to filter through the surfacing and head back into the environment. My septic tank is 15' feet from house following leach is 280' feet away from Septic tank and farthest end of leach field is almost 7' foot drop in elevation. There are about 165,000 households in Ireland with a septic tank system and a well. This allows rain water to gradually filter through the surfacing and go back in the ground. Design Considerations: (a) Soakaway pit should be sufficiently large to avoid flooding and overflow. S. This discharge does not require a Drainage Field. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. Within the septic tank and soakaway range detailed above if septic tank systems already in place, otherwise capital cost much higher. DESIGN AND CONSTRUCTION STANDARDS FOR SEPTIC TANKS, SOIL ABSORPTION SYSTEMS, AND OTHER SMALL WASTEWATER SYSTEMS Section 1. 5 and 4m deep, but never less. The height of the inlet pipe should be 1. 2. Some advantages on why one must consider soak pit for discharging wastewater. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. A partition wall raised at a distance of half-length of the tank and a 150mm x150mm hole is made at 450mm height in the wall to connect both chambers. Soakaway designs are crucial in Southwold IP18 6 to ensure water is able to filter through the surfacing and head back into the environment. Soakaway Design in Oxford. The solids being heavier than the waste liquids, settles down at the bottom of the septic tank concrete slab floor. septic tank and soakaway, a household connection is needed. 6. cat: Tanks. 2 can be used. The septic tank must be sited in a location where a suction tanker can get to it to empty it. Materials such as grease and oil float to the surface in the tanks to form. Soakaway designs are crucial in Taunton TA1 3 to ensure water is able to filter through the surfacing and head back into the environment. Soakaway Design in Herefordshire. If the base is constructed on a gradient the water will naturally collect at the low points. Soakaway designs are crucial in Guide BB1 2 to ensure water is able to filter through the surfacing and head back into the environment. Detailed design guidance is given in BRE Digest 365 or CIRIA Report C753. It serves the function of slowly letting wastewater soak into the ground. Modern Septic Tanks. S Vent Pipe Covered Access Ope ni ng Covered Access Ope ing Sludge Sludge Catchpit Dung Channel Detachable Screen Covered Access Open ng All effluent from septic tanks or aerobic tanks shall be discharged to a subsurface treatment system. Expect to pay between £830 and £1,140 to install a soakaway drain underneath a driveway. A soakaway is a drainage system in Ireland ZE2 9 which involves digging a hole in the ground and it filling with rubble. A soak pit, also known as a soakaway or septic tank soakaway, is an underground structure designed to receive and disperse wastewater from septic tanks or other. from the septic tank into the soakaway, an inspection chamber allows ex amination of the . The system allows contaminants and impurities. Ensure their Drainage Field has been correctly designed and installed to meet This should govern the planning of your system and will inform whether a septic tank will be suitable for your property. Pour water to 300mm in depth, measure from the bottom. 2. Design Considerations. This allows rain water to gradually filter through the surfacing and go back in the ground. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. The solids being heavier than the waste liquids, settles down at the bottom of the septic tank concrete slab floor. Bore a hole 150mm in diameter with an auger, to a depth of one metre. The difference between the two are clear: Drainage field = Dispersal of wastewater. Tanks shall be watertight and fabricated to. 8m (I. The middle layer of effluent exits the tank and travels through underground perforated pipes into the. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. ; the Wyoming Environmental Quality Act, W. Whilst septic tanks do 45% of the work in treating effluent, drainage fields will do the remaining 55%. In the past when a septic tank soakaway was construc. As above said, the capacity of septic tank should be designed correctly because insufficient tank size may result in wastewater backup to the house or it coerces us to clean the water often and also it will increase the maintenance cost. No of persons per family = 6 nos. Viewer. Therefore, we would need 10,058/3058 = 3. Again the sampling was purposive to ensure that septic tanks with soakaway pit are included but at the same time ensuring uniform spatial. This draining system collects water from areas such as gutters and driveway drains which then flows down a pipe and into the hole. 8m wide, 1. 70 3. The size of the septic tank needed is based on the number of bedrooms the house has. Options for flow through tank partitions 300mm Partition wall with slots Top of partition 150mm W. For a soakaway, liquid either from a septic tank or rainwater would enter the backfilled hole and drain away. In the past when a septic tank soakaway was constructed, a shingle or gravel bed would be put down first. Figure 1 below is a schematic diagram showing the general arrangement of the components of a soakaway system. Our experienced engineers can fix any problem you might see with your septic system. Design the Septic System: Engage a professional septic system designer or engineer to create a suitable system design based on the percolation test results and local regulations. 822-2615 [email protected] soakaway is a drainage system in Gwynedd SY20 9 which involves digging a hole in the ground and it filling with rubble. For example, for a septic tank serving 12 people (p) discharging to a drainage field within a Vp of 20 seconds per mm: Discharge rate to drainage field = 12 × 150 = 1,800 litres per day or 1. Discharge to a watercourse (stream, ditch, pond, etc) is not allowed. Detention period. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. There will be a pipe placed within the hole which will lead all the excess water from surrounding areas into the pit. It disperses septic effluent into the soil, without causing problems due to soil saturation and 'Backing-up' of the system. A soakaway is the drainage system used to discharge wastewater from a private sewage system like a septic tank or domestic treatment plant. through which domestic wastewater. These two types of tank do not operate in isolation, and they need an outlet for the separated wastewater to pass into in order for the wastewater to pass safely into the surrounding ground. Soakaway Design in Scotland. 30 5. plain pipe from the septic tank to the soakaway, followed by 16 metres of specially perforated 110mm diameter piping and fittings. that takes care to send effluent to the fields only at intervals rather than continuously as wastewater enters the septic tank a. 35-11-2004; and W. The trench area requirement may be reduced if the percolation rate is increased, pro rata to the requirements shown in Table 2; on the other hand, the trench area would need to be increased if the percolation rate is slower. Maintenance includes emptying a septic tank of the sludge that builds up so the wastewater disposal system, including the soakaway, can still function. A septic tank consists of one or more concrete or plastic tanks of between 4000 and 7500 liters (1,000 and 2,000 gallons); one end is connected to an inlet wastewater pipe and the other to a septic drain field.