Hey I made a small trench with the point of a stick...it works. As said if the pressure is low on your unit take the restrictor out of the shower head right where the threads to the hose is, also make sure there is noty another restrictor at the fuacet end of the hose...that will help loads..plus the end of the galley tap has a restrictor in the aerator that if removed will not bother the aeration process, just make sure you get the bits back in the right order minus the restr. Your pump is a whole lot better than most think.