Sewage and stormwater overpumping ensures uninterrupted operation during upgrades or emergencies. WJ offers reliable systems and 24/7 support for a wide range of infrastructure scenarios.
Overpumping (or bypass pumping) is used when existing sewage or stormwater systems need repairs or upgrades. Since these systems remain in use, a temporary solution is required to divert the flow safely.
In growing cities like Dubai, Abu Dhabi, Doha & Jeddah, upgrades to pipelines, manholes, and pumping stations are common. Surface-mounted pumps are set up to divert flow from an upstream manhole, through temporary HDPE pipework, and back into a downstream manhole—allowing work to proceed in dry conditions.
To isolate the work area, inflatable or mechanical plugs are installed upstream and downstream of the repair zone. This process requires flow reduction and close coordination with local authorities (e.g., DEWA, RTA, ADSSC). Installation is carried out by trained technicians working in confined spaces.
Flow rates in sewer and stormwater systems can vary throughout the day. Site inspections help estimate peak and low flows before setup. For reliability, systems are typically designed with 100% standby capacity. Continuous supervision, alarms, and backup pumps ensure smooth and safe operation, even if blockages or failures occur.
Once work is complete, plugs are removed and the temporary system is taken down.
WJ offers a complete overpumping solution—from system design to installation and operation. Our large fleet includes high-flow diesel pumps with solids handling, as well as electric and hydraulic options. Many of our pumps are designed for heavy-duty rag and debris handling.
We work closely with clients, contractors, and local authorities to design effective systems. Site visits help us assess:
