Posted by & filed under SuDS, Sustainability.

Sustainable Drainage Systems (SuDS) have been evolving for at least two decades as a science.  Meanwhile, over the last 4-5 years the development of government policy into a set of workable strategies and standards seems to be repeatedly hitting the buffers.

One key sticking point is a belief, upheld by many SuDS protagonists, that the preferred and most effective approach to managing surface water and to reduce flood risk is to provide a vegetated SuDS solution and to keep all runoff at the visible surface.

The use of engineered proprietary products or “grey infrastructure” typically means units buried underground.  This is seen as a second-rate solution by some “purists” who would not even recognise these products as SuDS components.

This view ignores the ability of proprietary products to beneficially impact water quantity and quality, possibly to a higher degree of consistency than vegetated SuDS.  It also ignores the fact that the performance of such products can be accurately validated.

Developers will no doubt seek the lowest cost solution that will be the easiest to implement.  Underground proprietary SuDS systems free valuable land space and can help increase (or at least preserve)  the developable area of a site compared with vegetated-only SuDS solutions.

Terms and definitions may be seen as a nuance, but the vocabulary used is vital if a comprehensive toolbox of ALL the SuDS solutions is made available to the developer so that the standard can be met using any suitable combination of vegetated SuDS and proprietary SuDS.

For more information on Sustainable Urban Drainage Systems follow the link or give the CPSA a call.

Posted by & filed under Sustainability.

CPSA has direct experience of the Supplier A Vs Supplier B claim/counter-claim culture.   We embarked on an  embodied carbon audit of precast concrete pipes and manholes in 2010 to PAS 2050 methodology, possibly the most “stringent” of the recognised methodologies at that time.  This work was independently validated by Carbon Clear and reviewed by the Transport Research Laboratory (TRL).  As a result of this study a further analysis was undertaken comparing the embodied carbon impacts of concrete pipes with a number of common plastic sewer pipes.  The results were generally favourable to concrete pipes.

A recently published study by a plastic pipe manufacturer refers to the CPSA embodied carbon data for concrete pipes and attempts to demonstrate that their product has a substantially lower embodied carbon than equivalent size concrete pipes.  The CPSA has not been able to get access to the full details of this work.  However, there is sufficient information to be confident that the work is fundamentally flawed, despite the involvement of a UK university.

CPSA has attempted to work with the university involved in “Supplier B’s” study to validate the comparison.  Unfortunately, the university  was not able to provide the level of expertise required to undertake such a detailed examination!

Benchmarking studies such as Supplier B’s is unhelpful. Whilst work is ongoing to consolidate carbon accounting theory and practice, there will remain a degree of variability of the data produced and the way that it is promoted and interpreted.

To cut through the numerous anomalies that currently exist, an up skilling of construction industry professionals in carbon accounting (and other environmental audits) is desperately required.  This will help users to differentiate between information that is developed in an appropriate way from the spurious “Supplier B” type claims that appear to be based on tenuous data and applied in a dubious way.

I hope that my simple checklist in part 1 of this blog will help you make an informed decision. For more information on Sustainable Urban Drainage Systems follow the link or give CPSA a call today!

Posted by & filed under Sustainability.

Ask a random sample of ten construction industry professionals to define a carbon footprint and you will get ten different responses.  We seem some way off agreeing a single definition of what a carbon footprint actually is and establishing a carbon auditing process common to all activities.

There are a number of alternative carbon footprint definitions.  We also have a number of alternative carbon auditing methodologies to choose from, many recognised at national and international level.  Despite the plethora of recognised options, some will create a carbon footprint to their own, unrecognised methodology.

Call me cynical, but wouldn’t it be tempting to apply the methodology that presents the most competitively attractive results?

Unless you are an expert, you stand a good chance of being hoodwinked into believing anything that appears credible.  So how does the layman decide which results to believe, if any?

Nothing can be better than genuine expertise in this complex field of applied science, but as a first step, to help you screen the wheat from the chaff, I’ve put together a simple three-step checklist which highlights the most fundamental factors to consider:-

  1. Is the raw data generic (=secondary data) or specific only to the material, activity or process under evaluation (=primary data)?  Generic data may produce considerable errors if there is a wide divergence of data.  Primary data should be more reliable, provided  it is assembled, calculated and independently validated in accordance with recognised methods.  Consider the reliability, representativeness and accuracy of this data.
  2. Is the data compiled to a recognised methodology (e.g. EN 15804, PAS 2050, ISO 14040/14044) and has the information been assessed and validated by an accredited third party?
  3. If the data includes a comparison (e.g. Supplier A vs Supplier B), are the data sets aligned in terms of the Product Category Rules (PCR), methodology, boundary conditions, to make the comparison meaningful?

For more information on Sustainable Urban Drainage Systems follow the link or give CPSA a call today!

Posted by & filed under eNewsletters & eBlasts.

This Issue: Proprietary Sustainable Drainage Systems and Components

Welcome to the Spring 2013 edition of Pipelines. As we head towards a new National SuDS Standard – anticipated in April 2014 – sustainable water management is now a major consideration in construction and the design and operation of surface water drainage systems (SuDS) continues to gather momentum. CPSA members have been actively involved in the development of proprietary SuDS components and systems and CPSA has compiled useful new information and guidance. Innovation has never been stronger at CPSA and two excellent examples include circular precast base manhole systems and the award winning concrete pipe lifter. See below for important updates.

The CPSA website is continually adding helpful new material including free downloadable pdf documents on a range of topics. Recent additions include Factsheets on structural design and classification of pipes; joint integrity; a case study relating to liability when things go wrong and a case study on product design optimisation for a storm water storage and attenuation scheme. And don’t forget to keep your professional development up to date by registering for one of our free CPD seminars.

Stuart Crisp, Business Development Director, CPSA

Proprietary Sustainable Drainage Systems and Components

Sustainable drainage systems usually consist of a combination of natural and proprietary systems. Natural systems require space and can provide amenity value. Although some proprietary systems can provide amenity, they are often installed underground which enables the surface to be used for other purposes.

They are also particularly suitable for retrofit purposes.CPSA members offer a wide variety of proprietary SuDS components and systems suitable for use within a sustainable drainage system.

A new section has been added to the CPSA website and to the Technical Design Guide incorporating the latest information on SuDS components and systems. A helpful lookup table is included to help customers select an appropriate solution based on the function of the element within the Water Management Train, i.e. Collect, Treat, Re-Use, Infiltrate, Attenuate, Convey. For further details click here

Manholes Update

Demand has been brisk since the launch of CPSA member’s range of modular off-site circular precast base manhole systems. It’s hardly surprising as clients, designers and installers begin to recognise the site safety, installed cost and time efficiency benefits. Further advantages of up to 40+% reduced embodied carbon compared with traditional manhole construction and an improved, watertight joint design means that the old problem of extra energy consumed during pumping and water treatment due to infiltration can be eliminated.

Many of the water utilities and private developers have issued information bulletins to their staff and supply chain partners encouraging the use of these new systems, but despite an apparent universal acceptance of the many benefits that these manholes provide, awareness is not as strong as it could be and it is still important to spread the word.

If you have already experienced the many advantages of circular precast base manhole systems, please “spread the word. If you are yet to become part of the brigade of new circular precast manhole designers/installers/users and don’t want to be left behind, click here for more information.

Concrete Pipe Lifter Update

In the last issue of Pipelines, we mentioned the numerous industry awards won by the Concrete Pipe Lifter including the Water Industry Achievement Award for Safety, inclusion in the Construction Products Association’s prestigious Innovation and Achievement publication and finalist in the Highways Magazine Excellence Awards.

Of course, awards and public recognition is nice, but the really important thing is for the innovation to bring real, tangible benefits. The ever-increasing demand for the Concrete Pipe Lifter clearly demonstrates that the improved safety, time and cost savings achievable during the offloading, handling and installation of concrete pipes speak for themselves.

The Pipe Lifter is suitable for concrete pipes up to DN1200. Customers are keen to get their hands on the Type 2 Lifter – which is designed for larger pipes – and extend the advantages of safer, easier, faster and cheaper concrete pipe handling and installation. The Type 2 Lifter is still in development. To find out what people are saying about the Concrete Pipe Lifter and for news on Type 2 lifter availability, visit

Posted by & filed under eNewsletters & eBlasts.

This Issue: 7th edition of “Sewers for Adoption” now available

Welcome to the Autumn edition of Pipelines. In this issue, our lead article covers an important industry milestone with the recent publication of “Sewers for Adoption” 7th Edition. You will also learn about some useful on-line design tools that can help reduce the installed cost and embodied carbon of sewers. And there’s an update on the hugely successful concrete pipe lifter. You can also keep right up to date by signing-up to a CPSA social network and don’t forget to maintain your professional development by registering for a free CPD seminar.

Stuart Crisp, Business Development Director

7th edition of “Sewers for Adoption” now available

On 1st October 2011, water and sewerage companies in England and Wales became responsible for existing gravity private sewers and lateral drains that connected to the public sewer system.

This change means that pipelines adopted in the future will include a significant proportion of small laterals and sewers that were previously excluded and as a result, were not considered in previous editions of “Sewers for Adoption”. The 7th edition of “Sewers for Adoption” (SfA7) provides extended guidance to cover these smaller sewers and lateral drains and introduces further changes designed to reduce the differences in requirements between the water companies.

Other important updates have been introduced to reflect the technology now available and current industry Best Practice. These include:

  • Alternative construction details are included for Manholes Type 1A, 1B and Type 2. These details reflect the recent introduction of circular precast manhole base systems available from CPSA members. They have many benefits designed to satisfy designers, contractors and operators alike. The new design offers:-

– Reduced construction time
– Decreased installation costs
– Improved Safety on site
– Superior quality
– Watertight system
– Reduced carbon footprint

For more details on circular precast manhole base systems click here

  • Good engineering design should minimise or eliminate the risk of defects or failure. Clause E6.4.3 “Precast Concrete Manholes, Chambers and Wet Well” states that “Joints shall be made so that the required jointing material fills the joint cavity. Concrete to concrete contact across the joint shall not be permitted.”
    This requirement has been included to ensure that point loads are avoided at joints between units and to prevent over-stressing of sections as a result of localised concentration of loads. SfA7 states “Precast concrete manhole sections and cover slab to be bedded with mortar, plastomeric or elastomeric seal conforming to BS EN 1917 and BS 5911-3.”
    All CPSA members provide systems fully compliant with Clause E6.4.3


 Concrete Pipe Lifter Wins Industry Plaudits

Since it’s launch earlier in 2012, the Concrete Pipe Lifter has picked up the Water Industry Achievement Award 2012 for Safety and shortlisted for the Highways Magazine Excellence Awards 2012. The Lifter has also been recognised by the Construction Products Association and will be included in the prestigious Construction Products Innovation and Achievement publication, CPIA 2012.

Demand for the Lifter has been brisk. So much so, CPSA’s supply partner MGF has begun development of the Type 2 Lifter for concrete pipes larger than DN1200. Type 2 Lifters are expected to be available early 2013.

Further details on the Concrete Pipe Lifter can be found at


Posted by & filed under eNewsletters & eBlasts.

This Issue: Safer, faster handling and installation solutions

Concrete Pipe Lifter launched.

Loading and offloading delivery vehicles and installation of pipes and manhole components requires great Health & Safety guidance and care. It is reported that more than 75% of major fall-from-vehicle incidents occur during loading and unloading activities. The HSE estimated in 2004/05 that the human and economic cost of reported fall from-vehicle incidents was over £36.5 million.

The award winning* Concrete Pipe Lifter is a new, simple-to-use, inexpensive system introduced to the UK by CPSA. It is a collaboration across all members of the Association who are actively driving to improve site safety and increase efficiency during the delivery, offloading and installation of sewer pipes in open cut trenches.

The Concrete Pipe Lifter is connected to an excavator via a quick hitch attachment and uses no motorised parts making it easy to maintain. The lifting arm is inserted horizontally into the barrel of the pipe and raised to make contact with the internal crown of the pipe. The clamp arm will press down onto the top of the pipe at the socket end and hold it in position. The pipe may now be lifted and transferred to a suitable storage location or placed into the prepared trench and jointed following the application of a suitable joint lubricant. The pipe may be tilted up to 30 degrees from horizontal and manoeuvred between struts on trench support systems.

It can also be used to push the pipe home to ensure formation of the correct joint gap. It can be used to lift concrete pipes from DN300 up to DN1200.

Concrete Pipe Lifter can be hired for £150 per week or purchased for £6000 from CPSA supply partner MGF Trench Construction Services.

With a Concrete Pipe Lifter fitted to an excavator you can offload and lay concrete pipes with greater safety, in around half the time, with potential cost savings and less hassle.

  • Safer. No operative needed on vehicle during offloading or in trench during installation.
  • Easier. Simple to use and maintain. No special equipment and minimal training required.
  • Faster. Around 50% saving in installation time.
  • Cheaper. Fewer operatives plus greater productivity.

See the video and find out what people are saying at

Is your site implementing manual handling Best Practice?

Lighter weight products made from other materials may initially appear easier to use and some suppliers have suggested that these items can be used without the need for mechanical lifting equipment.

In fact, according to Health & Safety Executive guidance on weight limitations for manual handling, many lighter weight pipe products are in excess of the upper limit for safe lifting. In many cases, this means that HSE guidelines and Safety Best Practice are not being followed and the use of “light weight” as a marketing tool could lead to lack of appropriate risk assessment and safety management on site. CPSA’s Information Sheet on Manual Handling

*CPSA’s Concrete Pipe Lifter has been crowned Winner of the Health & Safety Initiative of the Year at the Water Industry Achievement Awards 2012.

The event is organised by sister journals WET News and Water & Wastewater Treatment to reward outstanding innovation in the UK water industry. There are 13 categories covering all aspects of the water industry which are open to the water companies, their contractors, consultants, sub-contractors and suppliers. The awards recognise outstanding innovation and best practice across the industry. Entries were judged by independent panels of industry experts. They considered achievements that clearly demonstrate innovation and best practice.

Posted by & filed under eNewsletters & eBlasts.

Pipelines – A Newsletter from the Concrete Pipeline Systems Association

New Standard launched for calculating carbon footprints

European Standard EN 15804 “Sustainability of construction works – Environmental product declarations – Product category rules” is due out February 2012. It is expected to make a significant impact on how the carbon footprints (CFPs) of construction products are calculated.

Currently, there is no single universal method to calculate CFPs for products and services in the construction industry. The most widely used database (and calculation methodology) is the Bath University Inventory of Carbon & Energy (ICE). The ICE database does not follow a single specific method. It contains a wide range of CFPs collected from studies worldwide and some industry values are amended to meet the requirements of the ICE Methodology. However many of the ICE Method requirements may be in direct conflict with the new EN 15804.

These include precision, completeness, insignificant emissions cut-off and how recyclable content is dealt with. Of these differences, it is believed that the treatment of recyclable content and end-of-life scenario will have the most dramatic effect as Bath University uses a method to allocate impacts between a virgin material’s first life and its recycled second life using a “50:50 method” formula, while EN 15804 does not apply an allocation to a product’s second life. It is believed that the CFPs of reinforced concrete pipes may end up around 6% lower when EN 15804 is used compared to ICE.

Other CFP standards include PAS 2050, the WBCSD/WRI Protocol Standard and ISO 14067 (which is yet to be released). However, it is understood that all these Standards should be overridden by EN 15804. BRE’s Environmental Profile database for construction products contains cradle-to-grave CFPs for a wide range of construction products. However it is also believed to be different to EN 15804 CFPs.

CPSA calculate that the results of the PAS 2050 embodied carbon study for precast concrete pipes and manholes will change by no more than 1-2% when assessed using EN15804.

For more information on EN 15804, visit the BSI website.

Publicly available databases can be misleading

Do you know the difference between primary data and secondary data? Are you familiar with carbon dioxide equivalent (CO2e) compared with carbon dioxide-only (CO2) emissions? These are just two factors that can lead to widely varying results when making design, specification and procurement decisions. Are you sure that your comparisons are based on the most reliable data available? For help, take a look at our pipe comparison report and manhole comparison report.

Warning: Your carbon calculator may be out of date

How can you keep up with the updates to carbon databases? The introduction of a new methodology, Standard or simply a new set of data doesn’t always mean that carbon calculators are updated with the latest data. For example, in February 2011 the University of Bath Inventory of Carbon and Energy (ICE) was updated to version 2.0. However, there are many still referencing data from the earlier version 1.6a. The current ICE version 2.0 refers to the CPSA PAS 2050 embodied carbon study for precast concrete pipes and manholes (Reference 300). However, if the ICE V2.0 generic data for precast concrete is used rather than the CPSA data specific to concrete pipes and manholes, the resulting carbon footprint can be over-stated by between 20%-60%.

Book your CPD Presentation today

This seminar explains the fundamentals of carbon accounting, the data required to produce a carbon footprint and the importance of data reliability. Book now

Posted by & filed under eNewsletters & eBlasts.

Understanding Carbon Footprints

We are at a crossroads. Whilst the UK government is spearheading a huge drive to reduce carbon emissions across all sectors, the construction industry, like many others is caught in the midst of a burgeoning number of carbon reduction strategies and targets whilst still grappling with the most fundamental question. What is a carbon footprint? Without a proper understanding of the basic principles of carbon accounting it is difficult to make meaningful comparisons between alternative designs. CPSA has set out to help clients, specifiers and installers make informed decisions.

Stuart Crisp, Business Development Director CPSA

Embodied Carbon Study

CPSA has undertaken a comprehensive study into the embodied carbon of concrete pipelines compared to alternatives and published three detailed technical reports and a new brochures ummarising the main findings of the study.

The study reveals that the carbon footprint of concrete pipes is 20-60% lower than the values for generic precast concrete derived from many industry databases. The cradle-to-site greenhouse gas emissions of concrete pipes were found to be generally better than plastic pipes and up to 35% lower CO2e for DN2100 pipes…

Book your CPD Presentation today

This seminar explains the fundamentals of carbon accounting, the data required to produce a carbon footprint and the importance of data reliability. Book now

Posted by & filed under eNewsletters & eBlasts.

The manhole system the drainage industry has been waiting for

The UK concrete pipeline systems industry has  introduced a new precast manhole system packed with many benefits that will satisfy designers, contractors and operators alike.

  • Reduced construction time
  • Decreased installation costs
  • Improved safety on site
  • Superior quality, reduced maintenance
  • Watertight –reduced running costs at treatment works and pumping stations
  • Reduced carbon footprint

Traditionally, manhole construction has required the base to be formed in-situ where building of the channel, connections and benching occurs in the trench, often in wet and unpleasant conditions.  The process can take around 40 hours per manhole and is not always successful, particularly in terms of leakage where egress of waste water can lead to contaminated groundwater and ingress can contribute to the common problem of overloaded sewer networks plus increased energy usage and running costs at treatment works and pumping stations.

The new manhole system comprises a precast concrete base unit, complete with channel and benching with predetermined combinations of inlet(s) and outlet and new chamber rings with watertight flexible joints and no lifting holes, thereby removing points of possible leakage.Both base units and chamber rings are made with thicker, stronger walls.  The robust design means that the requirement for a concrete surround is eliminated, unless specifically required.  The excavation is backfilled sooner and there is less need for men to work in confined spaces.  This reduces time spent in the excavation, further improving site safety and reducing installation costs.

Installation of the whole system is speedy and efficient.  Once in position, wet trades are eliminated, formation of benching on site and sealing of lifting holes is avoided and follow-up operations can start immediately.  Field trials indicate that time savings of over 30% can easily be achieved, particularly when installed without a concrete surround. The system also yields environmental advantages as less concrete is used, there is less waste and less excavated material is disposed to landfill.  An annual saving of over 15,000 tonnes of CO2 is estimated in the UK if all manholes manufactured by members of CPSA changed to the new precast base system. The quality of material and finish is well above that normally achieved on site and the full system is manufactured under factory conditions by third party certified companies to ISO 9001 quality management system.  Products are Kitemarked  to BS EN 1917:2002 and BS 5911-3:2002 Concrete Manholes and Inspection Chambers and tested under laboratory conditions.UK Water Companies have embraced the new precast manhole system and given their acceptance to use the design for new projects in lieu of traditional in-situ concrete construction.  Full acceptance is anticipated throughout the UK in the near future.

For further details about precast manhole bases and product availability, please contact CPSA on 0116 253 6161

Eco project adopts sustainable Easi-Basefor manholes

Cawrey Homes have been building houses in Ratby, Leicestershire since 1968, completing over a 1,000 new build and refurbished properties all to an exacting high standard and using the most energy efficient and cost effective materials available. The most recent development of 36 homes have all been designed to meet the Code for Sustainable Homes – Level 4, a sustainability standard that will be mandatory from 2013.

In recognition that the total build extends below ground to include storm and waste water drainage, the house builder in conjunction with its civils ground worker, M&J Beddard Construction, was quick to see the benefits FP McCann’s Easi-Base manhole system could bring by fitting into the sustainability criteria for materials.

The DN 1200 Easi-Base addresses a long-standing problem associated with traditional methods of manhole construction. Labour intensive, in-situ practices typically taking up to 36 hours are eliminated by the fully integrated unit which can be installed and connected in a matter of minutes. There are also considerable savings associated with reductions in embodied energy and embodied greenhouse gas emissions due to reduction in materials use and installation efforts.

The precast concrete base complete with channels and benching formed into a polypropylene liner is placed on a formation comprising compacted granular material. Pipe connection is made simple as connection bells are cast into the base for the specific pipe in use, thus allowing the ground worker to simply push the pipe into the base via the sealed connector. A watertight seal is instantly achieved. Water flows through the unit via a 1% preformed fall in the channel exiting at the outlet point. Conventional methods of constructing the manhole above the base are then followed, with precast concrete chamber rings placed directly on top.

In total, 12 DN 1200 Easi-Base units were supplied to the Ratby scheme, mainly for the site foul and storm system, however the ground worker was so impressed with Easi-Base, that Severn Trent Water was persuaded to use the product in adopted sewers. Each unit was installed and connected within 30 minutes.

John Cawrey, MD of Cawrey Homes commented, “The Easi-Bases have helped to speed up drain-laying and have reduced time spent benching manholes. The base being pre-formed, can be set and left ready for inspection once the cover is on.The system saves on labour and materials; there should be less time spent ‘snagging’ chambers prior to formal adoption by the water company.”

Learn about Carbon Footprinting and gain CPD hours, for free!

The CPSA training programme for industry professionals has been extended with the launch of a new CPD accredited presentation “Embodied Carbon Emissions in Concrete and Other Pipeline Materials”.

Everyone today is talking about sustainability. The UK’s pledge to reduce carbon emissions by 80% by 2050 will place immense pressure on industry to deliver. Carbon reduction and efficiency targets are appearing in all sectors. However confusion is widespread and “Carbon Accounting” can still be considered in its infancy. The new CPD presentation:

  • Explains the fundamentals of carbon accounting and the data required to produce a carbon footprint
  • Identifies recognized information sources and indicates limitations to the reliability of some data
  • Includes a detailed analysis of pipelines and provides comparisons with alternative pipeline materials and installation methods
  • Provides an overview of other environmental impacts such as responsible sourcing, recycling and embodied energy

To register your interest or to learn more about the full CPD programme click

Perfect timing from CPM’s Perfect Manhole

CPM’s Perfect Manhole was ready and waiting for Laing O’Rourke  as they marked the spot at their £13 million Springwell Community School in Barnsley project and just 25 minutes later the manhole was complete, proving that the CPM’s Perfect Manhole not only saves on labour and materials but also time.

How to install Perfect Base in six images – the process took 25 minutes only

Precast Drainage Products Attracts visitors at the BEST/Infrastructure show

All members of CPSA took part at the Infrasructure Show at Birmingham’s National Exhibition Centre between the 18th and 20th of October last year. The show proved to be a success to members as a number of new precast pipeline products and innovations were exhibited at the show -, including different types of the new precast manhole bases currently produced by CPM Group, Stanton Bonna and F P McCann. F P McCann’s UK Precast General Manager, Andy Cooper commented, “Our stand and range of specialist  products on offer generated much interest, attracting a healthy cross section of business prospects from contractors and merchant groups, to civil engineers and consultants. We’ve had very good interaction with and encouraging feedback from our visitors, giving us plenty to follow up on in the coming weeks.”

Stanton Bonna launches Perfect Manhole video on YouTube

Now that the majority of water companies have approved Stanton Bonna’s new watertight manhole and pre-formed base, known as The Perfect Manhole System, the company has launched a video to demonstrate the ease of achieving a safe, rapid and consistently high quality installation.

Stanton Bonna’s short video, available on its web site and on You Tube, shows a typical installation to help contractors, specifiers and merchants to appreciate the benefits of the system, as outlined at the top of this Newsletter. The six minute film shows a straightforward step-by-step installation of:


  • a DN1200 factory made watertight base unit, pre-benched with a 167º channel bend, DN300 inlet and outlet holes with seals
  • DN300 concrete spigot and socket butt pipes
  • 1 no. 1000mm and 1 no. 500mm thick-walled watertight chamber rings
  • 1 no. cover slab



t was the first time that Yorkshire based contractor Peter Duffy Limited had installed the Perfect System and despite being unfamiliar with it, the total installation time was only 1¼ hours including all pipework and partial backfilling. As a concrete surround is not required with the Perfect System, contractors can continue pipe laying immediately, gaining substantial and valuable time over the traditional method of manhole construction. Stanton Bonna has also ensured that its sustainable Perfect Manhole System benefits from a low carbon footprint and a design life of 120 years. Click
here to view the video on You Tube or here to find it at Stanton Bonna’s web site.