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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.

Drinking Water

Weholite pipes can be utilised on treatment works for inter-process pipework and for offsite build components where they can be used, above- and below- ground, in drinking water treatment plants.

They provide a lightweight engineered solution, with superior loading capacity and a lower carbon footprint, which is chemically inert and delivers a 120-year below- ground and a 60-year above- ground design life.

Systems are generally delivered to site as completed units. All products are pre-slung and lifted straight from the delivery lorry into place, eliminating the need for confined space entry on site and shortening programme time.

Waste Water

A wide range of Weholite products is suitable for wastewater applications including CSO Chambers, Wastewater Packaged Pumping Stations, Flow Regulator Chambers, V Notch Weir Chambers, Oversize Manholes, Flood Alleviation Tanks and Sewerage and Stormwater Networks.

HDPE sewer systems have an in-service life of at least 120 years, when materials, products and installation practices meet the appropriate requirements. For Weholite, this means those set out in ‘BS EN 13476-2: 2007 Plastics piping systems for non-pressure underground drainage and sewerage. Structured-wall piping systems of unplasticised poly (vinyl-chloride) (PVC-U), polypropylene (PP) and polyethylene (PE)’.


Weholite’s outstanding resistance to chemicals and corrosion makes it ideal for use in marine projects, where applications include outfalls, intakes and water crossings at internal pressures of up to 1.5bar.

Weholite 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. Weholite pipes can be delivered in long lengths, typically between 12 and 18 metres, welded on site and submerged.

Weholite provides all of the technical advantages of equivalent PE solid wall pipes but with substantial savings in weight, combining greater ease of installation with increased cost effectiveness.

Installation preparation involves a patented grouting process. This innovative methodology eliminates the need for heavy concrete collars to ballast the strings, the traditional way of installing marine pipelines which can be extremely risky during submersion. Filling the hollow Weholite profile with an inexpensive and pumpable grout reduces preparation time and ensures the submersion is much easier to control and therefore safer. With no concrete collars a smaller trench is needed, dredging is minimised and the volume of excavation drastically reduced. Installation is quick and reliable, whilst the pipes’ natural ability to flex enables them to adjust to different loading conditions, vibrations, stress and soil movements, without causing damage to the pipe.

Renewable Energy

Weholite pipes can be used for hydroelectric pipelines and intake structures, anaerobic digestion and air vent systems.

Weholite provides an economical alternative to other piping materials for use in hydropower projects, where water is diverted from a river or collected from surface runoff and conveyed down a penstock piping system to a generating station, as an environmentally friendly way of generating electricity without adversely affecting flow or water levels.

Weholite is used extensively for ventilation systems or odour control. Ground air heat exchangers offer a sustainable way of heating and cooling buildings; ventilation air is drawn through underground pipes, which pre-cools the air in summer and pre-heats it in winter.

Weholite pipes and tanks are used in biogas projects, as host tanks for the biological breakdown process of the food and animal waste, and as chambers in which to house the equipment which transforms the biogas into heat and power.

Weholite is also particularly suitable for intakes and outfalls for power plants, sewage treatment plants, refineries and desalination plants.



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


SDS prevent contaminated surface runoff from entering the natural surroundings


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

Need to know more about specific features or benefits? Get in touch with our expert team.