Backflow Prevention


Ensure Safe, Healthy Water with Professional Backflow Prevention and Cross Connection Control Services

Harris Plumbing, family owned and operated since 1974, is a fully licensed Backflow Prevention plumbing contractor in Barrie, Newmarket, Aurora, Orillia and everywhere in Simcoe County, York Region and Muskoka. We are fully licensed in residential and commercial applications.

WHAT IS BACKFLOW: As per Wikipedia: “Backflow means the undesirable reversal of flow of a liquid, gas, or suspended solid into the potable water supply; a backflow preventer is designed to keep this from happening.”
A Backflow Device prevents potable water from being contaminated or poluted by non-potable water due to “backflow”. This device, or in some cases devices, will be strategically connected into the plumbing system wherever there is the possiblity of contaminated water coming into contact with potable (ie: drinking) water. Because these devices have moving parts, they must be inspected annually to ensure they are working as they should and therefore protecting the water supply they are connected to.
Backflow work MUST be performed by a licensed plumber with a specific backflow license who is also recognized and authorized by your local municipality.

The professionals at Harris Plumbing are BACKFLOW SPECIALISTS.   Call us as soon as you receive your letter.  Toll Free at 1- 866- 786- 1801  or

Newmarket, Aurora, Richmond Hill – 905- 853- 8520

Barrie, Orillia, Innisfil, Essa, Midland, Penetang –  705- 730- 7950

If you receive a letter of compliance from your municipality, contact us to schedule your surveys, inspections, annual device testing and device installations.

We work with the local municipalities of Barrie, Orillia, Aurora, Newmarket, Richmond Hill, Markham and Huntsville on your behalf to make it easy for you to comply with local requirements.

Should you receive a Backflow/Cross Connection related letter from your municipality, CALL US NOW for your appointment.
Contact Harris Plumbing Today!

You already trust the professional plumbers at Harris Plumbing with your home, business, cottage plumbing and septic/sewage systems. So of course you can also rely on Harris Plumbing for professional, licensed backflow plumbing services.

water drop32x32 Backflow Prevention Device Installations

water drop32x32 Backflow Prevention Device Annual Inspections

water drop32x32 Backflow Prevention Surveys & Consultations


As quoted in the OWWA website: ”A key concern of the OWWA and the water industry is the prevention of backflow, which is a flowing back of water, or reversal of the normal flow. If backflow occurs in a public water system, the action can pollute or contaminate the water in that system creating a health hazard for consumers.”