We are about to test the LDH on our pumper but I have only done this with 1 3/4 and 2 1/2. When we tested the attack lines, we did it without a hose tester by stretching out a couple hundred feet coming from a wye attached to the pumper and attaching a nozzle to the end. Charged the line to 50PSI and bleed out any air. Closed off the nozzles and bumped the pressure to whatever the hose was rated for, then shut off the wye, and left it charged for about 5 min and checked for leaks.
Now my question is, what is the proper way to test LDH? Is it done the same way as the attack lines and what is the best method for stopping the flow of water at the end of the hose? We will be testing 4" and 5".