Flowline Plumbers Waterloo helped us with a leaking bathroom sink drain. The plumber replaced the drain assembly, sealed it properly, and tested the sink for several minutes. He checked inside the vanity carefully before leaving. No more dripping has appeared. It was a simple…
Licensed · Same-day · Waterloo
Water Main Leak Repair in Waterloo
A water main leak wastes water every minute and can undermine your property. We locate the leak in your Waterloo water line and repair or replace it.

500+
Google Reviews
Same-day
Local dispatch
Flat-rate
Price before we start
Licensed
Insured · WSIB covered
A Water Main Leak Costs You Around the Clock
The water main is the line that brings fresh water from the street into your Waterloo home, and when it leaks it does so 24 hours a day, often underground where you cannot see it. The water shows up as a soaring bill, a soft soggy patch in the yard, dropping pressure at the taps, or the faint sound of running water with everything shut off. Flowline Plumbers locates the break in your main line and repairs or replaces it, so you stop paying for water you never use.

Signs of a Water Main Leak
- A water bill that jumped with no change in your usage
- A wet, sunken, or unusually green patch in the yard
- Low or dropping water pressure throughout the house
- The sound of running water when no fixture is on
- Air or sputtering when you turn on a tap

How We Locate and Repair Your Main Line
Finding a buried leak is the hard part, and guessing means digging up your whole yard. We use line locating to pinpoint the break first, then choose the least disruptive repair, whether that is a targeted excavation or a trenchless replacement of the line. You get a clear scope and a firm price before any digging starts.
Who Pays: You or the City of Waterloo
The line from the street into your home is generally the homeowner's responsibility, while the City typically handles its side. We help you understand where the leak sits and what falls to you before any work begins, so there are no surprises.
Why Waterloo Homeowners Trust Flowline With Main Line Leaks
- Accurate underground leak locating before we dig
- Repair and full line replacement options
- Licensed plumbers on every job
- Clear scope and firm pricing up front
- 50+ five-star Google reviews in Waterloo, plus 500+ Google reviews across Flowline

Licensed
On every job
Flat-rate
Upfront quote
Same-day water main leak in Waterloo
Call Now: 226-242-9145
Serving All of Waterloo
We cover neighbourhoods across Waterloo. If your home is in the city, we can reach you, often the same day you call.
Waterloo office180 Northfield Dr W 1st Floor, Unit 4, Waterloo, ON N2L 0C7Water Main Leak Waterloo: Common Questions
How serious is a water main leak?
Will you have to dig up my whole yard?
Am I responsible for the leak, or the City?
Recent five-star Google reviews
Live feedback from homeowners across our Ontario listings.
Our toilet kept clogging even though we were careful with it. Flowline Plumbers Kitchener came out and checked it properly instead of just doing a quick fix. The plumber cleared the blockage, tested the flush several times, and explained what may have been causing the repeat i…
Our shower valve was hard to turn and leaked from behind the handle. Flowline Plumbers Cambridge replaced the cartridge and adjusted the fixture. The plumber tested the shower and made sure it shut off completely. The handle feels smooth now and the leak is gone. It made the s…
Flowline Plumbers Guelph replaced a leaking faucet in our powder room. The plumber installed the new faucet and checked the drain. He tested everything and cleaned up. The sink works perfectly. Great plumber Guelph bathroom plumbing service.
Our bathroom shower handle was hard to turn and the water temperature kept changing. Flowline Plumbers Guelph replaced the cartridge and adjusted the handle. The plumber tested the shower and made sure the temperature control worked properly. It is much easier to use now. Exce…
Our shower drain was almost completely blocked. Flowline Plumbers Waterloo cleared the line and removed the buildup. The plumber tested it with the shower running and left the bathroom clean. The water drains quickly now and the shower is much more pleasant to use. It was wort…
Stop paying for a leaking main. Call Flowline Plumbers in Waterloo at 226-242-9145.
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water main leak in Waterloo, or call 226-242-9145 now.

