AUCKLAND COUNCIL RETENTION TANK MANUAL



Auckland Council Retention Tank Manual

Erosion and Sediment Control Guidelines for Land. The RainSmartВ® modular tank system is suited for subsurface, infiltration, retention and detention stormwater applications. This system allows the designer to efficiently control the buildup of sediments in the tank and allows for flushing of the system if ever required., If you own a building that contains a specified system such as a cable car, you must ensure they are effectively operated for the life of the building and in keeping with the council-issued compliance schedule..

Stormwater Attenuation Whangarei District Council

Airey Consultants Limited CivilNew Zealand. Stormwater retention /detention tanks. Go Underground. Add value and retain the beauty of your property with an inground retention and or detention and or re-use tank. Overview. 3,700 litres up to 22,500 litres (5,000 gallons) In ground (saves taking up valuable realty) Council approved product – all products carry PS 1 certificates, Tanks may be above ground or buried depending on council requirements -if the tank receives water from driveway areas then the tanks need to be buried. Storm water control is a council requirement for most properties. Fibreglass Tanks & Manufacturing provides tanks to meet council requirements for both storm water detention and storm water.

Often in these situations a stormwater detention tank is the best solution. Stormwater detention tanks are designed to store rainwater from roofs, drives, paths and other impervious areas. The water is then discharged to the stormwater system from the tank through a small diameter orifice pipe at a rate the stormwater system can cope with. A REVIEW OF STORMWATER MANAGEMENT POND DESIGN WITHIN THE AUCKLAND REGION Stefan Whiting, Tonkin & Taylor; Judy-Ann Ansen (Auckland Council) ABSTRACT Stormwater management ponds are one of the most commonly used stormwater treatment options within the Auckland region. Ponds provide both quality treatment and quantity control of stormwater.

In-Slab Stormwater Detention and Retention - modular OSD solution - save time, money and space with Aquacomb Auckland In-Slab Stormwater Detention and Retention - modular OSD solution - save time, money and space with Aquacomb Auckland

Water tanks NZ Detention tanks Plastic tanks for sale: Plastic Systems manufactures and supplies high-quality plastic water tanks and storage tanks designed for use in residential, commercial, industrial and farm settings. Our range includes: fresh water tanks, retention tanks, above ground and underground detention tanks, colostrum and Latest news and events from Stormwater360 Part 1: ChamberMaxxв„ў - Retain and Detain with one system The Auckland Unitary Plan has recently introduced new stormwater management regulations to the Auckland region including new Retention and Detention flow controls for sites located in a SMAF (Stormwater Management Areas: Flow) area.

GD06 updates and replaces TP58 - Auckland Regional Council Technical Publication No.58 On-site Wastewater Systems: Design and Management Manual (Third Edition, 2004), The Auckland Unitary Plan will be amended following a Plan Change to, amongst other changes, replace all references to TP58 with GD06. Select the tank based on the Detention Volume (DV) determined in Step 3. Once the tank make and model have been chosen, obtain the tank dimensions from the manufacturer’s specifications. Step 5: Determine the tank configuration . Using the chosen tank dimensions: Total Height (H) and Tank Plan Area PA( ), and the

GD06 updates and replaces TP58 - Auckland Regional Council Technical Publication No.58 On-site Wastewater Systems: Design and Management Manual (Third Edition, 2004), The Auckland Unitary Plan will be amended following a Plan Change to, amongst other changes, replace all references to TP58 with GD06. Tanks may be above ground or buried depending on council requirements -if the tank receives water from driveway areas then the tanks need to be buried. Storm water control is a council requirement for most properties. Fibreglass Tanks & Manufacturing provides tanks to meet council requirements for both storm water detention and storm water

GD06 updates and replaces TP58 - Auckland Regional Council Technical Publication No.58 On-site Wastewater Systems: Design and Management Manual (Third Edition, 2004), The Auckland Unitary Plan will be amended following a Plan Change to, amongst other changes, replace all references to TP58 with GD06. Except as stated in the paragraph above, no portion of the content of the website, or the council logo, may be copied or republished without the prior written permission of Whangarei District Council. All rights not expressly granted in these terms are reserved to Whangarei District Council. Enquiries should be addressed to:

All Thin Tank are designed by a professional consulting engineer in accordance with all AS/NZ Standards and designs confirmed with FEA testing. Thin Tanks are very committed to the water conservation industry – not only residential and industrial rainwater retention but also grey water recycling, storm water retention and water treatment. A REVIEW OF STORMWATER MANAGEMENT POND DESIGN WITHIN THE AUCKLAND REGION Stefan Whiting, Tonkin & Taylor; Judy-Ann Ansen (Auckland Council) ABSTRACT Stormwater management ponds are one of the most commonly used stormwater treatment options within the Auckland region. Ponds provide both quality treatment and quantity control of stormwater.

Bioretention Auckland Design Manual. Tanks for sale in New Zealand. Buy and sell Tanks on Trade Me., Practice Note - HCC 01: Overview for details of the drainage hierarchy. 1.3 Advantages of rainwater reuse and detention tanks . Rainwater reuse and detention tanks provide the following benefits: Reduces the use of potable water from the public water supply system. Reduces the annual volume of water which runs off from your site..

Stormwater tanks – K P Concrete

auckland council retention tank manual

Retention detention tanks Drainage SolutionsDrainage. Select the tank based on the Detention Volume (DV) determined in Step 3. Once the tank make and model have been chosen, obtain the tank dimensions from the manufacturer’s specifications. Step 5: Determine the tank configuration . Using the chosen tank dimensions: Total Height (H) and Tank Plan Area PA( ), and the, 21/09/2015 · The sale of slimline and stylish rainwater tank are booming in Auckland, but it's council planning rules, not attempts to cut water bills that's behind the trend..

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auckland council retention tank manual

RainSmartВ® Stormwater Modules Cirtex Civil. 1. Final tank dimension and location must be shown on as built plans. 2. A water trap is required between the tank and receiving wastewater system in combined catchments. 3. All paved area drainage and sub-soil drains must drain into the tank via a silt trap or cesspit. 4. A minimum vertical clearance of 600mm is required when discharging to a https://en.wikipedia.org/wiki/Auckland_waterfront Our Corrugated slimline water tanks are built for narrow spaces with limited access, and are ideal for the sides of houses or fences. Tanksalot Slimline corrugated tanks are available in a range of popular colours, TanksalotВ® slimline corrugated rainwater tanks come with a corrosion and construction warranty, and have internal stainless steel.

auckland council retention tank manual


Tanks for sale in New Zealand. Buy and sell Tanks on Trade Me. requirements for detention tanks which are used in both residential and non-residential applications for on-site stormwater management. Refer to Section 1 for residential applications and Section 2 for non-residential applications. Note: The Three Waters Management Practice Notes are a Hamilton City Council controlled document and will be subject to an ongoing …

A REVIEW OF STORMWATER MANAGEMENT POND DESIGN WITHIN THE AUCKLAND REGION Stefan Whiting, Tonkin & Taylor; Judy-Ann Ansen (Auckland Council) ABSTRACT Stormwater management ponds are one of the most commonly used stormwater treatment options within the Auckland region. Ponds provide both quality treatment and quantity control of stormwater. Stormwater retention /detention tanks. Go Underground. Add value and retain the beauty of your property with an inground retention and or detention and or re-use tank. Overview. 3,700 litres up to 22,500 litres (5,000 gallons) In ground (saves taking up valuable realty) Council approved product – all products carry PS 1 certificates

Auckland Council Stormwater Bylaw 2015. Auckland Council Code of Practice for Land Development and Subdivision Chapter 4 – Stormwater . Auckland Council TP10 Stormwater Management Devices: Design Guidelines Manual 2003 . ARC Technical Report No. 045 (December 2008) Page 2 of 3 June 2016 AC2264 (v.2) Water tanks NZ Detention tanks Plastic tanks for sale: Plastic Systems manufactures and supplies high-quality plastic water tanks and storage tanks designed for use in residential, commercial, industrial and farm settings. Our range includes: fresh water tanks, retention tanks, above ground and underground detention tanks, colostrum and

Often in these situations a stormwater detention tank is the best solution. Stormwater detention tanks are designed to store rainwater from roofs, drives, paths and other impervious areas. The water is then discharged to the stormwater system from the tank through a small diameter orifice pipe at a rate the stormwater system can cope with. Stormwater retention /detention tanks. Go Underground. Add value and retain the beauty of your property with an inground retention and or detention and or re-use tank. Overview. 3,700 litres up to 22,500 litres (5,000 gallons) In ground (saves taking up valuable realty) Council approved product – all products carry PS 1 certificates

Rotational Plastics provide a wide range of underground plastic detention tanks in all shapes and sizes. Quality products to provide the solution you need. Visit the website to see our full range and call us on 09 443 5880 for more information. It’s easy to find your ideal tank solution at APD. Make finding your tank requirements easy, by making use of APD’s helpful technical support. By asking about your specific needs, we’ll find the solution that’s perfect just for you. APD’s range of Tank and System solutions for above and below grounds will ensure whatever your

In-Slab Stormwater Detention and Retention - modular OSD solution - save time, money and space with Aquacomb Auckland In-Slab Stormwater Detention and Retention - modular OSD solution - save time, money and space with Aquacomb Auckland

Rotational Plastics provide a wide range of underground plastic detention tanks in all shapes and sizes. Quality products to provide the solution you need. Visit the website to see our full range and call us on 09 443 5880 for more information. Environmental Guideline 2010/01 - Erosion and Sediment Control Guidelines for Land Disturbing Activities i Acknowledgements The material in this Guideline has been drawn from the project manager’s experience and excellent resources already prepared by the Auckland Regional Council, Sunshine Coast Regional

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auckland council retention tank manual

Retention detention tanks Drainage SolutionsDrainage. Stormwater retention /detention tanks. Go Underground. Add value and retain the beauty of your property with an inground retention and or detention and or re-use tank. Overview. 3,700 litres up to 22,500 litres (5,000 gallons) In ground (saves taking up valuable realty) Council approved product – all products carry PS 1 certificates, A REVIEW OF STORMWATER MANAGEMENT POND DESIGN WITHIN THE AUCKLAND REGION Stefan Whiting, Tonkin & Taylor; Judy-Ann Ansen (Auckland Council) ABSTRACT Stormwater management ponds are one of the most commonly used stormwater treatment options within the Auckland region. Ponds provide both quality treatment and quantity control of stormwater..

Practice Note D6 Detention Tanks Water Tanks NZ

Auckland city council is pushing for more detention tanks. The Auckland Design Manual provides supplementary guidance to the Unitary Plan on design matters, which will be updated by the Council from time to time. The Manual is not part of the Unitary Plan and the Unitary Plan doesn’t incorporate the Manual by reference in the terms of the provisions of Part 3 of Schedule 1 to the Resource Management, DETENTION & RETENTION WATER TANK SPECIALISTS Are you looking for Detention tanks that slows the release of stormwater, or Retention tanks that can store water for your house or garden? Tanksalot® manufactures quality custom made Slimline, Round or Square Detention and Retention tanks for homes in Auckland and throughout NZ. Our rainwater.

Aquacomb is the best innovative stormwater detention solution on the market. Meet Auckland council regulations the smart way with Aquacomb OSD. Practice Note - HCC 01: Overview for details of the drainage hierarchy. 1.3 Advantages of rainwater reuse and detention tanks . Rainwater reuse and detention tanks provide the following benefits: Reduces the use of potable water from the public water supply system. Reduces the annual volume of water which runs off from your site.

Aquacomb is the best innovative stormwater detention solution on the market. Meet Auckland council regulations the smart way with Aquacomb OSD. Using water retention and detention tanks and soak holes will alleviate pressure on the Auckland Council storm water system and in turn aid in drainage to residential properties. This stored water can be utilized in the garden and toilets.

Botany Level 1, Fountain Lane North Botany Town Centre 588 Chapel Road, East Tamaki 2013 PO Box 39 101, Howick, Auckland 2145 Phone: (09) 534 6523 / Latest news and events from Stormwater360 Part 1: ChamberMaxxв„ў - Retain and Detain with one system The Auckland Unitary Plan has recently introduced new stormwater management regulations to the Auckland region including new Retention and Detention flow controls for sites located in a SMAF (Stormwater Management Areas: Flow) area.

Rural Tanks. With polyethylene tanks from 295 litres to 31,000 litres, we offer the largest range of water storage tanks in New Zealand. Aqua TanksВ® is also the highest accredited polyethylene water tank manufacturer in New Zealand giving you complete peace of mind. DETENTION & RETENTION WATER TANK SPECIALISTS Are you looking for Detention tanks that slows the release of stormwater, or Retention tanks that can store water for your house or garden? TanksalotВ® manufactures quality custom made Slimline, Round or Square Detention and Retention tanks for homes in Auckland and throughout NZ. Our rainwater

Botany Level 1, Fountain Lane North Botany Town Centre 588 Chapel Road, East Tamaki 2013 PO Box 39 101, Howick, Auckland 2145 Phone: (09) 534 6523 / This guideline has drawn heavily on the work of the Auckland Regional Council (TP 10 and TP 124) and the Auckland City Council (On-site Stormwater Management Manual). The project team gratefully acknowledges this work by Earl Shaver and Greg Paterson of those councils and their input to this guideline. Graham Levy, Senior Associate (Water Resources) of Beca …

So for starters, what is a retention or a detention tank? Here is a clear definition from Auckland city council. Detention tank: Detention tanks work by temporarily storing stormwater runoff during a rainfall event and then slowly releases the water into the public stormwater system. A REVIEW OF STORMWATER MANAGEMENT POND DESIGN WITHIN THE AUCKLAND REGION Stefan Whiting, Tonkin & Taylor; Judy-Ann Ansen (Auckland Council) ABSTRACT Stormwater management ponds are one of the most commonly used stormwater treatment options within the Auckland region. Ponds provide both quality treatment and quantity control of stormwater.

Rotational Plastics provide a wide range of underground plastic detention tanks in all shapes and sizes. Quality products to provide the solution you need. Visit the website to see our full range and call us on 09 443 5880 for more information. So for starters, what is a retention or a detention tank? Here is a clear definition from Auckland city council. Detention tank: Detention tanks work by temporarily storing stormwater runoff during a rainfall event and then slowly releases the water into the public stormwater system.

Select the tank based on the Detention Volume (DV) determined in Step 3. Once the tank make and model have been chosen, obtain the tank dimensions from the manufacturer’s specifications. Step 5: Determine the tank configuration . Using the chosen tank dimensions: Total Height (H) and Tank Plan Area PA( ), and the Retention of the rural character and quality on this part of the Hill is most important in those areas which are more frequently part of the public view. In particular Council will consider visibility from the summit lookout and its approach road, Bledisloe Park and residential Pukekohe, Buckland Road, Waiuku/Puni Road and Attewell Road. 33.

If you own a building that contains a specified system such as a cable car, you must ensure they are effectively operated for the life of the building and in keeping with the council-issued compliance schedule. It’s easy to find your ideal tank solution at APD. Make finding your tank requirements easy, by making use of APD’s helpful technical support. By asking about your specific needs, we’ll find the solution that’s perfect just for you. APD’s range of Tank and System solutions for above and below grounds will ensure whatever your

21/09/2015В В· The sale of slimline and stylish rainwater tank are booming in Auckland, but it's council planning rules, not attempts to cut water bills that's behind the trend. Using water retention and detention tanks and soak holes will alleviate pressure on the Auckland Council storm water system and in turn aid in drainage to residential properties. This stored water can be utilized in the garden and toilets.

Except as stated in the paragraph above, no portion of the content of the website, or the council logo, may be copied or republished without the prior written permission of Whangarei District Council. All rights not expressly granted in these terms are reserved to Whangarei District Council. Enquiries should be addressed to: Retention of the rural character and quality on this part of the Hill is most important in those areas which are more frequently part of the public view. In particular Council will consider visibility from the summit lookout and its approach road, Bledisloe Park and residential Pukekohe, Buckland Road, Waiuku/Puni Road and Attewell Road. 33.

requirements for detention tanks which are used in both residential and non-residential applications for on-site stormwater management. Refer to Section 1 for residential applications and Section 2 for non-residential applications. Note: The Three Waters Management Practice Notes are a Hamilton City Council controlled document and will be subject to an ongoing … Stormwater retention /detention tanks. Go Underground. Add value and retain the beauty of your property with an inground retention and or detention and or re-use tank. Overview. 3,700 litres up to 22,500 litres (5,000 gallons) In ground (saves taking up valuable realty) Council approved product – all products carry PS 1 certificates

All Thin Tank are designed by a professional consulting engineer in accordance with all AS/NZ Standards and designs confirmed with FEA testing. Thin Tanks are very committed to the water conservation industry – not only residential and industrial rainwater retention but also grey water recycling, storm water retention and water treatment. So for starters, what is a retention or a detention tank? Here is a clear definition from Auckland city council. Detention tank: Detention tanks work by temporarily storing stormwater runoff during a rainfall event and then slowly releases the water into the public stormwater system.

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auckland council retention tank manual

Icon Auckland Council. Auckland Regional Council is gratefully acknowledged for allowing the use of material from Technical Publication No. 58 (TP58) – On-Site Wastewater Systems, Design and Management Manual April 2007 ISBN: 1-877413-69-0 Report No: 2007/EXT/778 CONTACT 24hr Freephone 0508 800 800 help@horizons.govt.nz www.horizons.govt.nz SERVICE CENTRES, A REVIEW OF STORMWATER MANAGEMENT POND DESIGN WITHIN THE AUCKLAND REGION Stefan Whiting, Tonkin & Taylor; Judy-Ann Ansen (Auckland Council) ABSTRACT Stormwater management ponds are one of the most commonly used stormwater treatment options within the Auckland region. Ponds provide both quality treatment and quantity control of stormwater..

Bioretention Auckland Design Manual

auckland council retention tank manual

content.aucklanddesignmanual.co.nz. Water tanks NZ Detention tanks Plastic tanks for sale: Plastic Systems manufactures and supplies high-quality plastic water tanks and storage tanks designed for use in residential, commercial, industrial and farm settings. Our range includes: fresh water tanks, retention tanks, above ground and underground detention tanks, colostrum and https://en.wikipedia.org/wiki/Auckland_waterfront Aquacomb is the best innovative stormwater detention solution on the market. Meet Auckland council regulations the smart way with Aquacomb OSD..

auckland council retention tank manual

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  • Water tanks NZ Detention tanks Plastic tanks for sale

  • Often in these situations a stormwater detention tank is the best solution. Stormwater detention tanks are designed to store rainwater from roofs, drives, paths and other impervious areas. The water is then discharged to the stormwater system from the tank through a small diameter orifice pipe at a rate the stormwater system can cope with. Grafton Road Stormwater Retention Tank Sediment Analysis October TR 2008/024 1 Auckland Regional Council Technical Report No.024 October 2008

    Auckland Regional Council is gratefully acknowledged for allowing the use of material from Technical Publication No. 58 (TP58) – On-Site Wastewater Systems, Design and Management Manual April 2007 ISBN: 1-877413-69-0 Report No: 2007/EXT/778 CONTACT 24hr Freephone 0508 800 800 help@horizons.govt.nz www.horizons.govt.nz SERVICE CENTRES Stormwater detention refers to storing or detaining rainwater for short periods. The stored water is released at a reduced rate once the rainfall intensity reduces or stops. Note: This is different to collecting rainwater for later use in irrigating gardens or other uses, where the water is held in tanks for extended periods.

    Often in these situations a stormwater detention tank is the best solution. Stormwater detention tanks are designed to store rainwater from roofs, drives, paths and other impervious areas. The water is then discharged to the stormwater system from the tank through a small diameter orifice pipe at a rate the stormwater system can cope with. The RainSmartВ® modular tank system is suited for subsurface, infiltration, retention and detention stormwater applications. This system allows the designer to efficiently control the buildup of sediments in the tank and allows for flushing of the system if ever required.

    All Thin Tank are designed by a professional consulting engineer in accordance with all AS/NZ Standards and designs confirmed with FEA testing. Thin Tanks are very committed to the water conservation industry – not only residential and industrial rainwater retention but also grey water recycling, storm water retention and water treatment. Auckland Regional Council is gratefully acknowledged for allowing the use of material from Technical Publication No. 58 (TP58) – On-Site Wastewater Systems, Design and Management Manual April 2007 ISBN: 1-877413-69-0 Report No: 2007/EXT/778 CONTACT 24hr Freephone 0508 800 800 help@horizons.govt.nz www.horizons.govt.nz SERVICE CENTRES

    24F Auckland Council should consider creating an Urban Development Agency, to operate at the direction of the Auckland Council, with compulsory acquisition powers. The Auckland Council should determine the extent to which responsibilities for the delivery of stormwater services are shared between local councils and Watercare Services Limited. Often in these situations a stormwater detention tank is the best solution. Stormwater detention tanks are designed to store rainwater from roofs, drives, paths and other impervious areas. The water is then discharged to the stormwater system from the tank through a small diameter orifice pipe at a rate the stormwater system can cope with.

    DETENTION & RETENTION WATER TANK SPECIALISTS Are you looking for Detention tanks that slows the release of stormwater, or Retention tanks that can store water for your house or garden? TanksalotВ® manufactures quality custom made Slimline, Round or Square Detention and Retention tanks for homes in Auckland and throughout NZ. Our rainwater Tanks for sale in New Zealand. Buy and sell Tanks on Trade Me.

    Retention of the rural character and quality on this part of the Hill is most important in those areas which are more frequently part of the public view. In particular Council will consider visibility from the summit lookout and its approach road, Bledisloe Park and residential Pukekohe, Buckland Road, Waiuku/Puni Road and Attewell Road. 33. Rural Tanks. With polyethylene tanks from 295 litres to 31,000 litres, we offer the largest range of water storage tanks in New Zealand. Aqua TanksВ® is also the highest accredited polyethylene water tank manufacturer in New Zealand giving you complete peace of mind.

    It’s easy to find your ideal tank solution at APD. Make finding your tank requirements easy, by making use of APD’s helpful technical support. By asking about your specific needs, we’ll find the solution that’s perfect just for you. APD’s range of Tank and System solutions for above and below grounds will ensure whatever your Aquacomb is the best innovative stormwater detention solution on the market. Meet Auckland council regulations the smart way with Aquacomb OSD.

    Practice Note - HCC 01: Overview for details of the drainage hierarchy. 1.3 Advantages of rainwater reuse and detention tanks . Rainwater reuse and detention tanks provide the following benefits: Reduces the use of potable water from the public water supply system. Reduces the annual volume of water which runs off from your site. Practice Note - HCC 01: Overview for details of the drainage hierarchy. 1.3 Advantages of rainwater reuse and detention tanks . Rainwater reuse and detention tanks provide the following benefits: Reduces the use of potable water from the public water supply system. Reduces the annual volume of water which runs off from your site.

    Environmental Guideline 2010/01 - Erosion and Sediment Control Guidelines for Land Disturbing Activities i Acknowledgements The material in this Guideline has been drawn from the project manager’s experience and excellent resources already prepared by the Auckland Regional Council, Sunshine Coast Regional The RainSmart® modular tank system is suited for subsurface, infiltration, retention and detention stormwater applications. This system allows the designer to efficiently control the buildup of sediments in the tank and allows for flushing of the system if ever required.

    Retention of the rural character and quality on this part of the Hill is most important in those areas which are more frequently part of the public view. In particular Council will consider visibility from the summit lookout and its approach road, Bledisloe Park and residential Pukekohe, Buckland Road, Waiuku/Puni Road and Attewell Road. 33. Auckland Regional Council is gratefully acknowledged for allowing the use of material from Technical Publication No. 58 (TP58) – On-Site Wastewater Systems, Design and Management Manual April 2007 ISBN: 1-877413-69-0 Report No: 2007/EXT/778 CONTACT 24hr Freephone 0508 800 800 help@horizons.govt.nz www.horizons.govt.nz SERVICE CENTRES

    21/09/2015В В· The sale of slimline and stylish rainwater tank are booming in Auckland, but it's council planning rules, not attempts to cut water bills that's behind the trend. Tanks may be above ground or buried depending on council requirements -if the tank receives water from driveway areas then the tanks need to be buried. Storm water control is a council requirement for most properties. Fibreglass Tanks & Manufacturing provides tanks to meet council requirements for both storm water detention and storm water

    The RainSmartВ® modular tank system is suited for subsurface, infiltration, retention and detention stormwater applications. This system allows the designer to efficiently control the buildup of sediments in the tank and allows for flushing of the system if ever required. Tanks may be above ground or buried depending on council requirements -if the tank receives water from driveway areas then the tanks need to be buried. Storm water control is a council requirement for most properties. Fibreglass Tanks & Manufacturing provides tanks to meet council requirements for both storm water detention and storm water

    1. Final tank dimension and location must be shown on as built plans. 2. A water trap is required between the tank and receiving wastewater system in combined catchments. 3. All paved area drainage and sub-soil drains must drain into the tank via a silt trap or cesspit. 4. A minimum vertical clearance of 600mm is required when discharging to a Practice Note - HCC 01: Overview for details of the drainage hierarchy. 1.3 Advantages of rainwater reuse and detention tanks . Rainwater reuse and detention tanks provide the following benefits: Reduces the use of potable water from the public water supply system. Reduces the annual volume of water which runs off from your site.