... hose reel fitting will leak water, reducing the amount of pressure you receive at the other end of the hose. Improper ... .2.Water pressure test:To test the max bearable pressure of sprayer nozzle, hose ,sprinkler and connector.3).Air pressure test: As if using water pressure test, not ... easy to dry them before packing, and will using air pressure test.4).Almost all new products have to be tested before ...