Smooth Exterior HDPE Manhole

A lightweight, durable and watertight HDPE access structure designed for storm sewer networks, pipe connections and roadway or non-roadway installations.

Soleno’s smooth exterior HDPE manhole is designed to provide access to storm sewer and drainage networks for inspection, maintenance and pipe connections. Its HDPE construction makes it a lightweight, durable and corrosion-resistant alternative to conventional manholes, while helping maintain network watertightness.

Designed for infrastructure rehabilitation and new installations, the manhole can be tailored to project requirements. Its diameter can be the same as the connected pipes, helping avoid oversizing and optimize the overall system cost. The smooth exterior wall also helps limit the effects of vertical soil movement caused by freeze-thaw cycles.

Smooth exterior HDPE manhole designed for storm sewer access, drainage networks, inspection and maintenance.
Adaptable to infrastructure repair work and new installations according to project-specific requirements.
Manhole diameter can be the same as the connected pipes, helping prevent oversizing and optimize overall system cost.
Lightweight HDPE structure that simplifies handling and on-site installation compared with traditional manholes.
Smooth exterior wall designed to limit vertical soil movement caused by freeze-thaw cycles.
Excellent resistance to de-icing salts, abrasives, chemicals, vibration and CL-625, H-25 and HS-25 loads.
Compatible with adjustable cast iron frame and cover, as well as outlet bell configurations with integrated gasket and clips depending on the project.

Model shown: Smooth exterior manhole with adjustable cast iron grate and lid, and outlets bell with integrated gasket and clips (BIGC)

Technical documents Fill out a fabrication form

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Recommandation

The smooth exterior manhole is selected based on either roadway or non-roadway use, whereas a corrugated manhole/catch basin must be selected for non-roadway use.

The risk of heaving due to the freeze-thaw cycle must be taken into account. Soil movement will not affect a manhole with a smooth exterior.

Options :

Riser
Ladder
Flow regulator
Hook or eyelet
Other diameters and special fittings available on request
Special frames and grids
Hooking system for cast iron bell

Technical Documents

Typical drawing

Typical Drawing – Manhole with smooth exterior wall

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Specifications and data sheet

Specifications – Manhole with smooth exterior wall

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Data Sheet – Manhole with smooth exterior wall

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Minimum Angle Between Connections

Minimum Angle Connection Manhole CatchBasin

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Why Choose a Smooth Exterior HDPE Manhole?

A durable access structure for storm sewer networks

The smooth exterior HDPE manhole provides a reliable access point for inspection, maintenance and pipe connections in storm sewer and drainage networks. Its HDPE construction offers a lightweight and durable alternative to conventional manholes, helping simplify handling and installation on the jobsite.

Because the manhole diameter can be adapted to the connected pipes, the structure can help avoid unnecessary oversizing. This can contribute to a more efficient design and optimize the overall cost of the system, especially in projects where structure size, excavation and installation efficiency are important.

The smooth exterior wall helps limit the effects of vertical soil movement caused by freeze-thaw cycles. Combined with HDPE resistance to de-icing salts, abrasives, chemicals and vibration, this makes the smooth exterior manhole well suited for demanding underground stormwater infrastructure.

Common Applications

Storm Sewer Networks

The smooth exterior HDPE manhole can be used in storm sewer networks to provide access for inspection, maintenance and pipe connections. Its design helps maintain network watertightness while adapting to different connection requirements.

Drainage Network Access

Used as an access structure, the manhole allows crews to inspect, clean or maintain drainage infrastructure. It can be configured according to pipe diameter, connection layout and project requirements.

Roadway or Non-Roadway Installations

The smooth exterior manhole can be selected for roadway or non-roadway applications depending on project requirements, applicable loads and site conditions. The final configuration should consider traffic loads, soil conditions, freeze-thaw movement and network requirements.

Smooth Exterior Manhole or Corrugated Manhole/Catch Basin?

Comparing HDPE access structures for roadway and non-roadway applications

The smooth exterior manhole is generally selected when roadway or non-roadway installation is required and when vertical soil movement caused by freeze-thaw cycles must be considered. Its smooth exterior wall helps limit the effects of soil movement around the structure.

The corrugated manhole/catch basin is generally intended for non-roadway applications where a lightweight, economical and durable structure is required. The right choice depends on the installation area, applicable loads, soil conditions, pipe connections and stormwater network requirements.

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Validate the Right HDPE Manhole Configuration for Your Project

Planning a storm sewer, drainage network or infrastructure rehabilitation project? Our team can help you validate the smooth exterior HDPE manhole configuration based on installation area, pipe connections, load requirements, soil conditions and required accessories.

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FAQ - Frequently Asked Questions about our Smooth Exterior Manhole

What is a smooth exterior HDPE manhole?

A smooth exterior HDPE manhole is an access structure installed on a storm sewer or drainage network to allow inspection, maintenance and pipe connections. Soleno’s model is made from high-density polyethylene and designed to help maintain network watertightness.

What is an HDPE manhole used for in a storm sewer network?

An HDPE manhole provides access to the storm sewer network for inspection, cleaning, maintenance and pipe connections. It helps support long-term network performance by allowing localized interventions.

What is the difference between a manhole and a catch basin?

A manhole is mainly used to provide access to the network for inspection and maintenance. A catch basin is primarily designed to collect surface runoff and convey it to the storm sewer network. Some structures may combine both functions depending on their configuration.

What is the advantage of a smooth exterior wall?

The smooth exterior wall helps limit the effects of vertical soil movement caused by freeze-thaw cycles. This can make the structure more suitable for applications where frost heave and soil movement must be considered.

Can the smooth exterior manhole be installed in roadway applications?

Yes. The smooth exterior manhole can be considered for roadway applications when project conditions and applicable loads allow it. The structure is designed to withstand CL-625, H-25 and HS-25 loads according to the selected configuration.

What is the difference between a smooth exterior manhole and a corrugated manhole/catch basin?

The smooth exterior manhole is generally selected when roadway installation or freeze-thaw soil movement must be considered. The corrugated manhole/catch basin is generally intended for non-roadway applications where an economical and easy-to-handle structure is required.

Does the manhole diameter need to be larger than the pipe connections?

Not necessarily. The manhole diameter can be the same as the connected pipes, helping avoid oversizing and optimize the overall cost of the system.

How do you choose the right manhole configuration?

The right configuration depends on installation area, applicable loads, pipe connection diameter, soil conditions, access requirements, fittings and required accessories. For project-specific validation, it is recommended to consult a Soleno expert or fill out a fabrication form.