With the increasing development of land in urban areas and the natural flow patterns of the water cycle being compromised, leading to both an increase in volume and flow rates, as well as having a detrimental impact on the quality of surface water runoff, attenuation products offer a much needed solution.

In line with Sewers for Adoption 8 and current SuDS policies, precast attenuation tanks can be designed to suit need project needs.  They can manufactured offsite, ready for instance installation onsite, offering costs benefits, savings on onsite costs and benefits on site Health and Safety.

With minimum maintenance and a 100 year design life, precast attenuation tanks offer a long-term whole life solution and you peace of mind.

Attenuation Products

  • Direct Pipe Access System

    Marshalls CPM has developed and manufactured an offsite manhole for large diameter concrete pipe systems that completely removes the need for a traditional manhole, any on-site benching or concrete surround.

    View Direct Pipe Access System
  • Stop End Pipes

    A stop end pipe is normally used at the end of off-link tanks and do not include an access point. They can be manufactured with an inlet and outlet hole at any position with any diameter hole size complete with a seal.

    View Stop End Pipes
  • Stop End Bend

    Stop end bends consist of a 90° Bend used in an up-right position as access into the pipeline and are mainly used at the downstream end depending upon the overall depth required.

    View Stop End Bend
  • Side Entry Manholes

    Side entry manholes are normally used to gain mid run access entry into an in-line or off-line tank and consists of a standard concrete pipe complete with access shaft.

    View Side Entry Manholes
  • Mid Entry Manholes

    Mid entry manholes are usually used for mid run access into either in-line or off-line tanks and consist of a standard pipe with a saddle slab and cored access hole.

    View Mid Entry Manholes
  • Side & Mid Entry Manholes

    A side or mid entry manhole complete with a bend is an economic method for accessing a tank system, eliminating the requirement for a traditional manhole and is usually used for mid access into an in-line run requiring a change of direction.

    View Side & Mid Entry Manholes
  • End Entry Manholes

    An end entry manhole is used at the end of either an in-line or off-link tank, consisting of a standard pipe with a reinforced end wall, saddle slab pre-fitted onto the barrel complete with an access hole to suit and a 1200mm sealed manhole joint.

    View End Entry Manholes

Click on the images below to view the image gallery.

Got a question?

To find out more about Attenuation, please call our Sales Team or fill out the enquiry form and we’ll get back to you within 24 hours.

Let us help find what you need

Select from our list below to explore our solutions in detail

Search by application

Select from our list below to explore our applications in detail