Weholite can be defined as spirally wound pipe or flat panel, manufactured from corrosion-resistant HDPE, to provide a light weight, engineered solution with superior loading capacity that is chemically inert and provides a projected 120-year design life.

Weholite products are used in a wide variety of applications including stormwater attenuation tanks, pumping stations, soakaways, flood relief culverts and CSO flood alleviation schemes.

Weholite pipe systems can also be used for more demanding situations such as inter-process pipework on sewerage treatment plants and for offsite build components, as well as for hydroelectric pipelines and intake structures, anaerobic digestion and air vent systems, and as storage, contact and inter-process pipework for drinking water applications.

In August 2019, SDS acquired the exclusive licence to manufacture and sell Weholite, in modular and large diameter plastic pipe form, in the UK and Ireland. The production plant in Newport, South Wales, which has been manufacturing Weholite for more than 20 years, has the capacity to produce 10,000 tonnes of Weholite products each year.

How does it work?

In the design of water distribution systems, thermoplastic structured wall pipes represent a superior alternative because of their excellent physical, hydraulic and mechanical properties, and behave differently to traditional steel, ductile iron, concrete and other pipe systems.

The uniqueness of the Weholite production process means that pipes can be run in any length from 300mm to 30m in one piece. It is one of the few polyethylene pipes in the world that can be produced in dimensions larger than two metres and can be supplied in ring stiffness classes from 2 to 8kN/m².

SDS Weholite Pipes

Weholite products meet, comply with and often exceedthe applicable standards required by industry.

BSI
WRAS
WRC

Weholite pipes are manufactured and certificated to meet the material and performance requirements of BS EN 13476: 2007 (Part 1-3) Plastic Piping Systems for Non-Pressure Underground Drainage and Sewerage.

Weholite systems are WRAS-approved. Weholite is “Approved for Use in Public Water Supplies” under DWI Regulation 31 reference nos. DWI 56.4.513a and DWI 56.4.513b.

Weholite Pipe Systems, including welded joints, in diameter from 900mm to 3500mm meet the requirements set out in WRc Assessment Schedule PT/412/1117-AS and are certified by WRc.

BBA

Weholite systems, including any welded joints, are certified by Kitemark. Licence no. KM 560128 covers the manufacture of Weholite pipes, fittings and joints from DN400 to DN3000 diameter.

Weholite pipe systems from 450mm to 3500mm internal diameter are approved for use by Highways Authorities in England, Wales, Scotland and Northern Ireland as drainage structures (open ended and offline/online attenuation structures for surface and fluvial water).

Copies of our BBA HAPAS Certificates can be downloaded here:

14/H227  18/H283  18/H283(2)

Designed for both online and offline situations, Weholite systems are utilised by most of the major developers and adopted by all of the UK Water Companies. Pipeline products are also used in the Water Industry Capital Investment Programme (AMP) for water management infrastructure, and on major surface water drainage projects including highways development and repair, Network Rail improvements, Schools Building Programme, Energy from Waste projects and CSO flood alleviation for properties on the DG5 register.

DATA SHEETS

Downloadable product data sheets

Pipeline Systems

Pipeline Systems

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Manholes

Manholes

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Attenuation Systems

Attenuation Systems

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Flow Control Chambers

Flow Control Chambers

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CSO Control Chambers

CSO Control Chambers

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Pumping Stations

Pumping Stations

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Jointing Systems

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FEATURES & BENEFITS

Manufactured in sizes from 400mm internal dia to 3.5 metres
Largest choice of pipe bores available

Light weight
Enables super-fast installation

Resistant to impact, abrasion, corrosion, UV- and environmental deterioration
Can be used in harsh conditions and difficult locations

Available in one-piece lengths from 300mm to 30metres
All projects designed to optimise pipe length

Flexible, durable and reliable
Capable of withstanding extreme temperature ranges

Fusion-welded and watertight mechanical joints
120 year design life (60 years above ground)

Fully compliant with BS EN 13476
Meets latest EU regulations

Environmentally friendly production
Non-toxic, lower carbon footprint

Available as structured Wehopanels
Provides alternative structural solution

Find out how your development can benefit from SDS Weholite® and get in touch today.

RECENT CASE STUDIES

SOUTH SEBASTOPOL

SDS GEOlight® and Weholite® installed together at Wales residential development

M4 SMART MOTORWAY

SDS prevent contaminated surface runoff from entering the natural surroundings

BWSC, KENT

SDS installs Weholite® attenuation system at flagship renewable biomass CHP plant