Calgary Irrigation Water Connection: Wet Tap, Permit and Backflow Installation 2026

Irrigation Water Connection in Calgary: How Your System Connects to the City Main

Every Calgary irrigation system requires a proper water connection to the municipal supply, a City of Calgary plumbing permit for the connection work, and a registered backflow preventer installed to protect the municipal water supply from potential contamination from the irrigation system. Understanding these requirements helps Calgary homeowners know what is included in a proper irrigation installation and what to look for when comparing installation quotes.

Types of Irrigation Water Connections in Calgary

Dedicated Irrigation Service Connection (Wet Tap)

A dedicated irrigation water service connection — a “wet tap” — brings a separate water line from the City water main to the home specifically for the irrigation system. The irrigation supply is entirely separate from the household water supply. Benefits: the irrigation system does not affect household water pressure during operation; the irrigation supply can be shut off independently of the household supply for winterization; the City water meter records irrigation use separately for properties with dual meters.

A wet tap requires City of Calgary approval, a licensed plumber for the actual main connection, and a City permit. J&G Irrigation coordinates with licensed plumbers for wet tap connections on new Calgary irrigation installations.

Internal Branch Connection (Most Common)

For most Calgary residential irrigation installations, the system connects to the household water supply inside the utility room — typically off the cold water main before the water softener, using a saddle tap or tee fitting. This is simpler and less expensive than a wet tap and is the standard approach for Calgary residential irrigation where the household water supply has adequate pressure and flow capacity for both household use and irrigation zone operation.

All Calgary internal branch connections require a plumbing permit from the City and installation by a licensed plumber or a certified irrigation contractor with a plumbing permit.

Backflow Preventer: Mandatory for All Calgary Irrigation Connections

The City of Calgary Utility Bylaw requires a backflow preventer on every irrigation system connected to the municipal water supply. The backflow preventer is installed on the irrigation supply line immediately after the connection point and prevents irrigation water from flowing backward into the household supply or the city water main. The installed backflow preventer must be registered with the City and tested annually by a certified tester. J&G Irrigation handles the backflow preventer installation, City registration, and annual certified testing as part of standard service.