Backflow Prevention: What Every Homeowner in Saskatoon Should Know

June 27, 2025

When was the last time you thought about your home's water safety? For most homeowners in Saskatoon, clean drinking water is a given. But what if something you can’t see—backflow—was silently putting your household at risk?

A man in an orange vest is standing next to a pipe and writing on a clipboard.

In this blog, we’ll explain what backflow is, why it’s a serious concern for residential properties, and how certified backflow testing and prevention can protect your home and family. If you live in Saskatoon, Warman, Martensville, or surrounding communities, this guide is especially for you.

What Is Backflow?

Backflow happens when water flows in the opposite direction than intended—bringing dirty or contaminated water back into your home’s clean water lines.

It typically occurs when there’s a sudden drop in water pressure in the main supply line. For example, if there’s a water main break or a fire hydrant is opened nearby, pressure changes can pull water from contaminated sources—like lawn chemicals, cleaning fluids, or even sewage—into your tap water.

Why Is Backflow Dangerous?

Backflow can contaminate your drinking water with:
- Pesticides and fertilizers from garden hoses
- Bacteria from toilet tanks
- Chemicals from cleaning systems
- Pathogens from irrigation or sprinkler systems

These contaminants can pose serious health risks to your family and your neighborhood. In fact, Saskatoon’s water regulations require homeowners with potential cross-connections to have a backflow preventer installed and regularly tested.

Common Residential Sources of Backflow

Here are typical areas in homes around Saskatoon and nearby communities that pose a backflow risk:
- Outdoor garden hoses submerged in pools, buckets, or ponds
- Underground sprinklers or irrigation systems
- Boilers and hydronic heating systems
- Toilet tanks without anti-siphon valves
- Water softeners and appliances with plumbing hookups

What Is a Backflow Preventer?

A backflow preventer is a device that stops contaminated water from reversing direction and entering your home’s clean water supply. There are several types, including:
- Atmospheric Vacuum Breakers (AVB)
- Pressure Vacuum Breakers (PVB)
- Double Check Valve Assemblies (DCVA)
- Reduced Pressure Zone (RPZ) assemblies

Backflow Testing Requirements in Saskatoon

Did you know that annual backflow testing is a requirement in Saskatoon for certain residential and commercial properties?

If your home has:
- A lawn irrigation system
- A boiler or hydronic heating system
- Specialty water treatment systems
- Any type of cross-connection to the public water supply

...you are required by Saskatoon Water & Wastewater bylaws to have your backflow prevention device tested annually by a certified technician.

Failure to comply may lead to:
- Water service interruptions
- Fines
- Increased liability for contamination events

What You Should Do as a Homeowner

Here’s how to stay compliant and keep your family safe:
1. Install a proper backflow prevention device on all cross-connections.
2. Schedule annual testing with a certified backflow tester in Saskatoon.
3. Avoid leaving garden hoses submerged in pools, tanks, or containers.
4. Know where your backflow device is located, and keep it accessible.
5. Maintain proper irrigation and plumbing configurations to avoid accidental siphoning.

Backflow Testing Services in Saskatoon & Surrounding Areas

At MNS Limited Mechanical Contractors, we’ve been helping homeowners protect their water systems since 1953. Our certified backflow specialists provide:
- Installation of new backflow prevention devices
- Annual testing & certification
- Repairs and system diagnostics
- Compliance support with local regulations

We serve:
✅ Saskatoon
✅ Warman
✅ Martensville
✅ Corman Park
✅ Osler, Dalmeny, and surrounding rural communities