Make your Irrigation Project a Success! Aqualine Contractors has recently been involved in an orchard irrigation project that required extending onto an existing irrigation system. Most of the trench needed to have the 250mm mainline pipe as well as a sub-main, this meant the trench had to be 400mm wide and 1 metre deep which normally would be dug open with a digger. However, trenching this wide just got easier! The Quad RT80 Trencher is Aqualine Contractors specialty. Trench