When designing and installing clay drainage systems, sticking to the Building Regulations and relevant standards is critical to ensure safety, functionality, and compliance. The key regulations and standards include: BS EN 752:2017 (drain and sewer systems outside buildings) BS EN 1295-1:1997 (structural design of buried pipelines). These standards provide guidelines on the layout, gradient, and structural requirements necessary for successful […]

Today at our AGM we said thank you to Edward Naylor of Naylor Industries for his 30 years as a Director of the CPDA. Naylor have been involved with CPDA since it was incorporated in 1965. Edward’s father Allan Naylor had held an important role within CPDA for 10 years before taking up the role of Director from 1990 to […]

CPDA member Wavin recently supplied over 7,000 metres of clay drainage to Hollingworth Brothers for the roads and sewers drainage for a 360 plot housing development. Hollingsworth buyer Geraint Dodd said ‘We knew this was going to be a large, 48-week project so we wanted a product we knew and trusted’. Read more about the project here.

Following a meeting of CPDA members in November 2023 Stuart Steel has been elected as the new chairman (person) of the CPDA. Stuart has previously worked for CPDA member Naylor for 7 years working on the commercial side of the business and looking after technical products including jacking pies and chemical resistant pipes. Stuart is now working with another CPDA […]

The durability of sewer pipelines is a topic which does not seem to get much “airtime” but it is nonetheless an important issue in material selection and it is worth dwelling on the implications for the pipe market. There are a number of areas where pipe longevity appears to be a non-issue. The design life of an out-of-town superstore may […]

The bedding surround for any pipe is critical to support its load bearing capacity. For adoptable drainage bedding surrounds are split in to two categories; flexible and rigid pipes.  A clay pipe system is classed as a rigid pipe system which comes with significant advantages in its load bearing capacity and potential to use as dug materials for back fill.  […]

CPDA member Naylor manufactures the Denlok range of Vitrified Clay jacking pipes to BS EN295-7 standards; these are distributed in the UK and Ireland via Trenchless Solutions, who provide a comprehensive sales and technical support service. Trenchless recently supplied the DN400 x 1 metre Denlok NS vitrified clay jacking pipe pictured here. Vitrified Clay is an excellent material for trenchless […]

On World Environment Day, CPDA member Wavin celebrated the power of circular design in creating healthy and sustainable environments. Wavin are committed to reducing Scope 1 & 2 emissions by 47% by 2030 (versus 2019), achieving carbon net zero by 2050, and increasing the recyclability of our products to 90% by 2025. Together, we can build a greener future for […]

CPDA member Naylor have recently completed a third solar panel installation – this one being on the roof of their head office site at Wombwell. The installation comprises 1750 m2 of panels which are capable of generating up to 1180kwh of electricity per day. The installation complements previous installations on their manufacturing sites at Cawthorne and Barugh Green: they now […]

The Board Members of CPDA are sorry to report the passing of colleague Paul Wydell. Paul worked for Hepworth/Wavin from January 1989 and spent much of his 23 years at Hepworth/Wavin as a CPDA Board Member.