Preformed Manholes - Below Ground Drainage

Marshalls Civils & Drainage has developed an offsite large modular performed manhole system that is designed to speed up the installation of the manhole whilst providing a safe working environment for personnel working within the manhole.

Performed manhole sections are available in 2100 mm, 2400 mm, 2700 mm, 3000 mm, 3660 mm and 4000 mm diameters in 500 mm, 750 mm and 1000 mm depths, manufactured to the requirements of BS 5911-3. The 2100 mm, 2400 mm, 2700 mm and 3000 mm chambers are kitemarked.

The inlets and outlets are either pre-scored, pre-formed or cored holes (depending on size) to suit the customer’s bespoke requirements. Cover slabs to suit the performed system are manufactured to the requirements of BS EN 1917:2002 and BS 5911-3:2010 and can be manufactured with a standard opening or bespoke access.

Features and benefits:

• An established and proven product range that is Quality Assured.
• Wide wall products are supplied with a Butyl sealant which removes the need for a concrete surround.
• The chamber is supplied with a reinforced cast-in base.
• The chamber system provides performed inlet and outlet holes to suit pipe requirements.
• The chambers are manufactured in fixed steel moulds that give a superior dimensional accuracy.
• Wide wall chambers have an inherent structural concrete strength with a 120 year design life.
• Chamber units are supplied with cast-in lifting points.
• AutoCAD drawings can be provided.
• Kitemarked product range.