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Line Stopping Services
Line stopping services for water and sewer mains (3/4”–36”) that temporarily isolate pipe sections so repairs and construction can proceed without full system shutdowns.
3/4" through 36"
Temporarily Isolate Water & Sewer Lines Without Full System Shutdowns
Water Services Group provides professional line stopping services that allow utilities and contractors to temporarily isolate sections of pressurized water and sewer mains—without shutting down the entire system.
Line stopping is an effective solution when repairs, tie-ins, or system modifications must be completed while maintaining service to surrounding customers and critical facilities.
What does this service consist of?
Line stopping is a controlled method used to temporarily block flow within a live pipeline, allowing work to be performed downstream while the broader system remains operational.
This approach is commonly used when:
- Existing valves are missing, damaged, or inoperable
- A full system shutdown would impact too many customers
- Projects require precise isolation to maintain safety and control
Line stopping is often paired with hot tapping to create access points and valve insertion to establish permanent control points after work is complete.
Why professionals choose Water Services Group
Water Services Group brings utility-focused expertise to complex line stopping projects where control, coordination, and continuity of service matter most. We work closely with municipal teams and contractors to plan temporary isolation strategies that reduce risk, minimize disruption, and support both planned construction and emergency repairs. Our experience with live-main conditions helps ensure work is completed safely, efficiently, and with respect for system reliability.
When is it time to consider?
Municipal utilities and contractors rely on line stopping for:
- Water main repairs and replacements
- Utility construction projects requiring temporary isolation
- Tie-ins and reroutes where shutdown windows are limited
- Hydrant repairs or valve installations in areas with poor isolation
- Emergency response scenarios where time and service continuity matter
Line stopping allows crews to work efficiently while minimizing disruption and reducing project risk.
The process
Our approach to line stopping emphasizes planning, coordination, and control:
- System Evaluation & Planning
Pipe size, material, pressure, access, and project scope are reviewed to confirm feasibility. - Access Creation (If Required)
Hot tapping may be performed to create controlled entry points for the line stop equipment. - Temporary Isolation
A line stop device is inserted to block flow within the pipe, isolating the targeted section. - Project Work Completion
Repairs, tie-ins, or modifications are completed downstream of the stop. - System Restoration
The line stop equipment is removed, and the system is returned to normal operation.
(Permanent valves may be installed if part of the project scope.)
This method allows work to proceed safely while maintaining upstream and downstream service where possible.
Our Capabilities
Supported Pipe Sizes:3/4" through 36", depending on pipe material and system conditions.
Applicable Systems:
- Water distribution systems
- Sewer and wastewater pipelines (project-dependent)
- Municipal and industrial utility infrastructure
Each project is evaluated to determine the safest and most effective isolation strategy based on system configuration and project goals.
Common Scenarios
Let’s Discuss Your Project Requirements
If your project requires temporary isolation of water or sewer lines without widespread shutdowns, Water Services Group can help determine the right line stopping approach.
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