Marley Pipe Systems is the South African licensee of the Weholite pipework system, a large diameter gravity or low pressure high density polyethylene (HDPE) pipe. Constructed by a unique patented structured wall process, Weholite can be manufactured in a range of ring stiffnesses and large pipe sizes from 280mm up to 3500mm – depending on customer requirements.
New production techniques have been combined with the latest raw materials technology to produce a durable pipe system with superior load-bearing properties, making Weholite the preferred solution for many municipal and industrial applications in both the public and private sector – including stormwater management, sewage treatment systems, culverts, marine pipelines and irrigation water distribution.
Weholite Structured Wall HDPE pipe provides all the technical advantages of equivalent polyethylene Solid-Wall pipes, but with substantial savings in weight, thus combining greater ease of installation with increased cost effectiveness when compared to traditional materials.
Weholite pipes are highly abrasion resistant, tolerant of ground movement and will not corrode or deteriorate in contact with a wide range of substances. These pipes are also characterised by its natural ability to "flex", which enables them to adjust to different loading conditions, vibrations, stress and soil movements without causing damage to the pipe.
Marley manufactures Weholite pipe under licence from Uponor Infra (formerly KWH Pipe) and are manufactured in accordance with Uponor Infra and Marley internal standards which are in accordance with EN 13476 and SANS 21138 and form part of an SABS ISO 9001:2008 quality management system. Regular inspections and audits are carried out by the local inspection authority.
Weholite LP Couplings
The Weholite LP Couplings are designed and manufactured specifically for use with Weholite pipes. Made from a high-quality stainless steel with a vulcanised rubber seal, these couplings are leak-free, corrosion resistant and easy to install, and if installed correctly, can have a design life of over 50 years.
Features & Benefits of Weholite
Virtually Leak Proof
Ease of Installation
Easier to Transport. Easier to Install. Reliable Joints
Owing to its light weight, Weholite HDPE pipe provides for easy installation, even in complex installations where challenging conditions are presented, often removing the need for heavy lifting equipment and reducing health and safety risks. In addition, the availability of 12m lengths offers a greatly reduced joint frequency, which minimises the possibility of leakage or ingress of groundwater (which can lead to excessive loading of downstream treatment plants).
Applications of Weholite
Weholite Structured Wall HDPE Pipe has proven to be an ideal solution in irrigation and low pressure water conveyance applications. The properties of Weholite, including strength and durability as well as enhanced hydraulic flow, ensure the installation of irrigation systems that will withstand the test of time.
Applications include: river and canal diversion, agricultural irrigation systems, underground irrigation systems, irrigation pipelines, water conservation and safety
Applications include: sanitary interceptor sewers, sanitary sewer overflow, combined sewer overflow, aeration tank effluent and influent, final settling tank effluent and influent, plant effluent, tertiary filter effluent, and odorous air
For years, Weholite has been considered the ideal choice for slip lining corroded culverts, since the slip lining process prevents traffic delays and road closures normally associated with traditional ‘dig and replace’ techniques. Weholite’s high axial stiffness and high resistance to the hydrostatic collapse pressurecaused by grouting, simplifies the installation and grouting procedures when using this pipe to reline deteriorated highway culvert pipe.
Drainage & Stormwater
Applications include: culverts, culvert relining, drainage pipe for building developments, drainage pipe for roadways and railways, stormwater drains, stormwater detention/retention
More applications include:
- Cooling water intakes
- Pumping chambers
- Marine outfall
- Ventilation pipes
- Surface drainage
- Inter-process pipework
- Tanks, floats, ventilation ducts