Abstract: Sprinkler head mounting system for connecting a sprinkler head to a horizontal water supply pipe in an irrigation system (e.g., an agricultural irrigation system). In one embodiment the mounting system includes (a) a U-shaped tubular member connected to the water supply pipe, (b) a flexible tubular member coupled to the U-shaped member, (c) a conduit having inlet and outlet portions, (d) a riser connected to the outlet portion of the conduit, and (e) a counter-weight carried by the conduit for balancing the weight of the riser and sprinkler head. The mounting system prevents vibration from the sprinkler head from being transmitted to the water supply pipe.