Water Main and Water Service Line Repair

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Your water service line brings all of the water into your property, and the main shutoff valve is what lets you stop it in an emergency. When either one fails, everything downstream is affected. Plumber On Demand repairs and replaces main shutoff valves and water service lines for homes and buildings across Ontario.

Water main work we handle

• Main shutoff valve replacement when the valve is seized, leaking or will not close
• Water service line leaks at the foundation wall, meter area or underground
• Water service replacement for old, undersized, lead or galvanized lines
• Low pressure from the service caused by corrosion or damage to the line
• Pressure reducing valves installed near the main to protect fixtures and appliances

Signs your water service needs attention

Watch for low pressure throughout the property, a wet spot on the basement wall where the line enters, a damp patch in the yard, discoloured water or a main valve that will not turn. Older homes in Ontario may also still have lead or galvanized service lines, which are worth replacing for both water quality and flow.

Replacing a seized main shutoff

Many main valves have not been touched in years and seize in place, which is exactly when you need them most. Replacing an old multi-turn valve with a quarter-turn ball valve means you can shut off the water in seconds during an emergency.

Working with your municipality

The water service is usually split between the municipality, which owns the line up to the property line or curb stop, and the property owner, who is responsible from there into the building. We help you understand which part is yours and coordinate the work on the private side. For commercial properties, see our commercial water systems page.

Water Main and Water Service Line Repair FAQs