Sealed Manholes

The Milton Precast sealed manhole system - the Perfect Manhole, is a precast concrete chamber, base and cover slab arrangement that enables users to install a modular offsite, water tight manhole without the need of a concrete surround in a fraction of the time it takes to install a standard manhole.

Features of the Perfect Manhole System

  • Available in 1200mm, 1500mm and 1800mm diameters
  • Complies with BS EN1917:2002 and BS 5911-3
  • Meets WRc approval and is included in the Sewers for Adoption 7th edition
  • Available in varying depths for efficient construction
  • Available with or without double steps/ rungs
  • Available pre-benched or plain bottomed in days of requisition
  • 40% lower carbon footprint than traditional manholes
  • Available with a range of pre-fit options, such as Hydro-Brakes®, penstocks, non-return valves and filters
  • Can be installed in as little as 30 minutes
  • Provides a solution that offers increased confidence in ability to meet industry standards
  • Environmental advantages with less concrete being used and less excavated material removed from site, reducing on wagon emissions etc.
  • Lower cost benefits with reductions in construction time and skilled resource requirements
  • Eliminates material wastage associated with current practice in manhole base construction
  • Reduces maintenance and long-term running costs

Safer Installation on site

  • Reduces work in open excavations.
  • Eliminates the need to work in confined spaces, excavation closed faster
  • Eliminates difficult wet trades.
  • Allows for clean access , easy joint inspection, reducing maintenance and running costs

Faster Construction

  • Faster installation compared to standard manhole installation
  • Inlet and outlet connection invert levels pre-set.
  • No lifting holes to fill.
  • No tokstrip of similar is required.
  • No concrete surround is needed unless specifically required
  • Short notice availability
  • Take off service available
  • Complete watertight solution
  • Flexible Design offering you choice
  • Full installation manual available

Quality

  • Watertight system complying with BS EN1917:2002 and Kitemarked to BS 5911-3
  • Quality products made under factory conditions
  • Meets WRc approval and is included in the Sewers for Adoption 7th edition
  • Precise connection positions and channel gradients.
  • Monolithic base.
  • Perfect hydraulics
  • Has a 120 year design life
 
1200mm Perfect Base Unit
Dimensions A B C D E F Weight kgs
100mm outlet 1460 600 675 155 400 275 1607
100mm outlet 1460 675 750 155 475 275 1705
100mm outlet 1460 750 825 155 550 275 2006
150mm outlet 1460 600 675 155 450 225 1568
150mm outlet 1460 675 750 155 525 225 1665
150mm outlet 1460 750 825 155 600 225 1967
225mm outlet 1460 600 675 155 525 150 1854
225mm outlet 1460 675 750 155 600 150 1952
225mm outlet 1460 750 825 155 675 150 2049
300mm outlet 1460 600 675 155 525 150 1761
300mm outlet 1460 675 750 155 600 150 1859
300mm outlet 1460 750 825 155 675 150 1956

1500mm Perfect Manhole dimensions

1500mm Perfect Base Unit                
Dimensions A B C D E F G Weight kgs
100mm outlet 1780 900 985 155 730 225 160 3224
150mm outlet 1780 900 985 155 780 205 160 3195
225mm outlet 1780 900 985 155 780 205 160 3363
225mm outlet 1780 975 1060 155 855 205 160 3514
300mm outlet 1780 900 985 155 780 205 160 3566
300mm outlet 1780 975 1060 155 855 205 160 3716
300mm outlet 1780 1050 1135 155 930 205 160 3867
375mm outlet 1780 975 1060 155 855 205 160 3772
375mm outlet 1780 1050 1135 155 930 205 160 3922
375mm outlet 1780 1125 1210 155 1005 205 160 4072
450mm outlet 1780 975 1060 155 855 205 160 3835
450mm outlet 1780 1050 1135 155 930 205 160 3985
450mm outlet 1780 1125 1210 155 1005 205 160 4135
450mm outlet 1780 1200 1285 155 1080 205 160 4522
525mm outlet 1960 1125 1210 155 1005 205 230 5023
525mm outlet 1960 1200 1285 155 1080 205 230 5435
525mm outlet 1960 1275 1360 155 1155 205 230 5660
600mm outlet 1960 1125 1210 155 1005 205 230 4950
600mm outlet 1960 1200 1285 155 1080 205 230 5362
600mm outlet 1960 1275 1360 155 1155 205 230 5587
675mm outlet 1960 1125 1210 155 1005 205 230 5035
675mm outlet 1960 1200 1285 155 1080 205 230 5260
675mm outlet 1960 1275 1360 155 1155 205 230 5485
675mm outlet 1960 1350 1435 155 1230 205 230 5710

Perfect Manhole Chamber Ring weights

Size Weight kgs
1200 x 1000mm 1180
1200 x 750mm 890
1200 x 500mm 590
1200 x 250mm 300
1500 x 1000mm 1750
1500 x 750mm 1310
1500 x 500mm 870

Perfect Manhole cover slab weights

  600 x 600 675 x 675 750 x 600 1200 x 675
1200mm 675 600 600 470
1500mm 1170 1120 1120 960

Tel: (01795) 425191
Fax: (01795) 420360
E-Mail: sales@miltonprecast.com

Milton Pipes Limited, Milton Regis, Sittingbourne, Kent. ME10 2QF