SDS Weholite Attenuation Tank

Flood Prevention

HDPE pipe- and panel- based surface- and waste- water attenuation and drinking water storage system.

Key Benefits

Thermoplastic structured wall

Possesses superior physical, hydraulic and mechanical properties.

Manufactured in sizes from 400mm internal diameter to 3.5 metres.

Weholite pipes are one of the few polyethylene pipes in the world that can be produced in dimensions larger than two metres.

Available in one-piece lengths from 300mm to 30m.

All projects are designed to optimise pipe length.

Fusion-welded and sand-tight mechanical joints.

Provide 120 years’ design life underground and 60 years’ above ground.

Weholite Tanks

Weholite is 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, in particular for housing developments. Designed for both online and offline situations, these systems have been utilised by most of the major developers and adopted by all of the UK Water Companies.

Weholite 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.

Features and Benefits

Flexible, durable and reliable.

Capable of withstanding extreme temperature ranges and fully functional in difficult conditions including gravity and low-pressure applications.

Meets latest EU regulations.

Fully compliant with BS EN 13476: 2007 (Part 1-3) Plastic Piping Systems for Non-Pressure Underground Drainage and Sewerage.

Light weight.

Enables superfast installation.

Resistant to impact, abrasion, corrosion, H₂S, UV- and environmental deterioration.

Can be used in harsh conditions and difficult locations.

Pipe bores available from 400mm internal dia to 3.5 metres.

Provides the largest range of thermoplastic structured wall pipes available.

Fusion-welded and sand-tight mechanical joints.

Ensure a 120-year design life (60 years above ground).

Suitable for connecting with a wide variety of jointing systems.

Meets any specific project requirements.

Available in one-piece lengths from 300mm to 30m.

Suitable for most installations.

DWF channel with anti-slip flooring available.

Ensures safe movement within the tank.

Environmentally friendly production.

Non-toxic with a lower carbon footprint.

Industry Compliance and Accreditation

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

Weholite products 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 piping is 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 piping, 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.

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 the BBA HAPAS Certificates can be downloaded below:

14/H227

18/H283

18/H283(2)

Information Download

Flood Prevention

Weholite Tank Datasheet

Product FAQs

: 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.
: Weholite ultra strong HDPE pipes can be used for more demanding situations such as inter-process pipework on sewerage treatment plants and for offsite build components.
: Weholite HDPE is also suitable for hydroelectric pipelines and intake structures, anaerobic digestion and air vent systems, and as storage, contact and inter-process pipework for drinking water applications.
: Weholite pipes can be supplied in ring stiffness classes from 2 to 8kN/m².
: BS EN 13476 ensures a super-high standard for structured wall plastic pipe systems made from only three materials: HDPE, PP or PVC. It is not applicable to, and therefore cannot be used as a standard for, pipes made from other materials or combinations of materials. It covers all aspects of the system for foul and surface water sewers, providing end users with quality assurances as to the raw materials, wall thicknesses, impact resistance, ring flexibility and structural design.
: Weholite pipes have also attained certification for DWI Regulation 31 Reference no DWI 56.4.513 “Approved for use in public water supplies” and are WRAS-approved. Through adherence to the current edition of both ‘Sewers for Adoption’ and the ‘Civil Engineering Specification for the Water Industry (CESWI)’ as the guideline documents for this sector, projects can be approved under sections 104, 106 and 38 with both Water Companies and Local Authorities.
: Weholite pipes are BBA HAPAS approved for sizes from 450mm to 3500mm internal diameter.
: Yes; we provide a full structural design service along with pre-installation meetings.

Real World Impact

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SDS Limited,
Clearwater House, Castlemills,
Biddisham, Somerset,
BS26 2RE,
United Kingdom

Contact

info@hostingtest.sdsinfrastructure.com +44 (0)1934 751303

SDS Weholite Attenuation Tank

Key Benefits

Weholite Tanks

Features and Benefits

Industry Compliance and Accreditation

Information Download

Product FAQs

Why should I specify HDPE in preference to other traditional materials?

Why is Weholite better than other plastic materials?

Are there any other applications for which I should consider Weholite pipe based systems?

What is the structural rigidity of the pipes?

What independent assurance of product quality and fitness for purpose do Weholite pipes have?

Are there any other industry standards to which Weholite pipes comply?

Can Weholite pipes be used in Highways schemes?

Does SDS provide any design support or advice?

Real World Impact

Howden, Yorkshire

RAF Lossiemouth, Moray

M4 Smart Motorway

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