NBS Source
I'm a manufacturer

Application

For use in both foul and surface water applications

Description

A perfect sealed manhole system available in 1200 mm, 1500 mm and 1800 mm diameters and comprises of a monolithic precast concrete base (available pre-benched in any configuration, a sealed chamber ring (with a thicker wall than a standard ring), a rubber joint (so no tokstrip of similar product is required) and a sealed cover slab which is supplied with your required access.


Designed and manufactured to last a minimum of 120 years that provides a sealed manhole system that gives up to 40% savings on greenhouse gases compared to traditional manhole construction and eliminates the need of ready mixed concrete to form the traditional base, chamber benching and further concrete to surround the manhole.


A complete manhole can be installed in as little as 30 minutes, reducing the need to work in confined spaces and eliminates the need for wet trades resulting in rapid construction compared to traditional methods as well as a reduction in the time the excavation is open.


The sealed manhole complies with BS EN 1917:2002 and BS 5911-3 and has been accepted for use by all major UK companies.


Features and benefits:

  • Safer construction – No requirement to work in confined spaces. No requirement to form a concrete surround. Reduction of open excavation.
  • GHG Savings – Up to 40% savings on GHG emissions compared with traditional build.
  • Fast installation – The modular solution eliminates the need for wet trades resulting in rapid construction compared to conventional methods.
  • No need to surround in concrete unless specifically required – 130 mm wall thickness.
  • Available at short notice – Our modern method of production enables just in time delivery of all components including monolithic bases at short notice.
  • Design freedom – All designed monolithic perfect base characteristics such as location of the inlets and outlets and invert configuration can be manufactured individually and exactly in accordance with the wishes of the specifier and client.
  • Perfect Hydraulics – everything flows. Optimized flow characteristics by customized base configuration of all inlets and precise drop in channels and pipe connections.
  • Watertight – The combination of a thicker wall and rubber joints ensures a watertight structure.
  • No water ingress into sewerage network reduces treatment costs – The combination of a 130 mm wall and sealed rubber joint to withstand a minimum of 5 m / head pressure*.
  • Combined seal includes load distributor – Load distribution ensures even distribution of vertical loads*.
  • Allows joint inspection – Correct installation can be visually confirmed.
  • Efficient construction – Available in varying depths for efficient construction.
  • Base options – available pre-benched or plain bottom with or without inlet/outlets.
  • Pre-fit options – Hydro-brakes, penstocks, non-return valves and filters can be pre-fitted at the factory.
  • Flexible connections – The perfect manhole can connect to plastic, clay or concrete giving you a larger choice.
  • Fully tested under factory conditions – The whole system from base to cover slab is subject to testing.
  • Kitemarked solution manufactured under factory conditions – Complies with the requirements of BSEN 1917 and BS5911-3.
  • Concrete for Life – Built to last. High quality durable concrete with a minimum 120-year design life.
  • Full take-off service available.
  • Lifting apparatus available for fast, effective and safe handling.


*Please note Watertightness is defined in BS EN 1917 as resisting a 5 m head for 15 minutes, this is to simulate a temporary surcharge condition not a permanent head of water. Shafts in high water tables are subject to buoyancy effects.

General information

Color

Grey

Finish

Cement

Material

Precast concrete

Shape

Circle

Length

1200 mm

1500 mm

1800 mm

Manufacturer guidance

Diameter.

Width

1200 mm

1500 mm

1800 mm

Manufacturer guidance

Diameter.

Height

600 mm

650 mm

725 mm

800 mm

875 mm

Show more

Warranty description

120 year

Uniclass

Pr_65_52_01_21 Concrete manhole chamber sectionsPrimary

CAWS

R12/407 Manholes and inspection chambers – concrete

R12/62 Manholes and inspection chambers – concrete

Specification data - Concrete manhole chamber sections

Standards

To BS EN 1917 and BS 5911-3.

Certification

BSI Kitemark.

Dimensions

-

Clear internal dimension

1200 mm.

1500 mm.

1800 mm.

Section thickness

130 mm.

Manufacturer guidance

Wall thickness.

Integral accessories

Guidance for specification option:

Consult manufacturer and insert requirements.

Sustainability data

Contains Red List materials

No

Country of product manufacture

United Kingdom

Material

Precast concrete

Similar products from Marshalls Civils & Drainage

Caissons - Below Ground Drainage

Caissons - Below Ground Drainage

Chamber Rings (Traditional)

Chamber Rings (Traditional)

Combined Sewer Overflows - Sewer Drainage

Combined Sewer Overflows - Sewer Drainage

Flat Pack Systems - Attenuation Tanks

Flat Pack Systems - Attenuation Tanks

Preformed Manholes - Below Ground Drainage

Preformed Manholes - Below Ground Drainage

Soakaways - Below Ground Drainage

Soakaways - Below Ground Drainage