About Us

We believe the intelligent use of irrigation water is sustainable.

Loyalist Irrigation Limited is a family company locally owned and operated by Steve and Sue Mommertz.

Our reputation is well known in the local landscaping community. We get many referrals from existing clients, quality landscapers, and lawn maintenance companies. We respect our clients need for a long term dependable and reliable irrigation system. Our client base has a large amount of competitor installed systems. We continue to outlast competitors who focus only on the sale of an installation. We are committed to giving the best service possible. Because we will call you back, show up for appointments, maintain and improve your lawn or garden watering system properly. Our first installation was in 1985 and it is still in perfect working condition.


Over 1,000 installations
Rain Bird, Select Contractor
Rain Bird, Irrigation Designer
Irrigation Association, Certified Landscape Irrigation Auditor
Irrigation Association, Certified Irrigation Contractor
Landscape Ontario, Certified Irrigation Technician,
Ontario Water Works Association, Certified Cross-Connection Control Specialist,
Kingston Utilities, Registered Cross Connection tester


Landscape Ontario Member
Canadian Nursery Association Member

Service Area

Kingston, Prince Edward County, Napanee, and Gananoque.

Types of sprinkler systems we install

Flower pot micro drip systems
Flower bed micro spray systems
Subsurface inline drip garden sprinkler systems
Sport field turf watering systems
Residential lawn sprinkler systems
Commercial lawn watering systems
Weather Smart Watering systems
ET Manager Systems