Every gardener needs a good garden hose as an essential tool for watering all types of plants in the home landscape. Selecting the correct garden hose requires understanding how much water each type dispenses to your lawn and garden. The amount of water that goes through a garden hose per minute depends on the diameter of the hose tubing, water pressure and hose length.
A 1/2-inch garden hose delivers about 9 gallons of water per minute. The standard 5/8-inch garden hose delivers 17 gallons per minute. Larger hoses, such as a 3/4-inch hose, use up to 23 gallons per minute. The average water pressure for your garden's hose bib produces about 40 psi (pounds per square inch).
Diameter refers to the hose's actual tubing width. This size directly affects the amount of water that travels through the hose. A wider hose allows for a stronger flow with less pressure loss.
Reductions in Flow
Less pressure and longer hose length results in reduced water flow; standard rates of flow vary for this reason. Smaller hose tubing produces a lower flow rate. Water traveling a great distance through multiple lengths of hose also suffers from reduced water pressure.