We have set up a new Pumper/Tender with 1200 feet of 3 inch that is set up for a forward lay. I am asking to change the hose lay so that we can pull one or two lines to pump to the attack engine, in a reverse lay. I am being told by command, that a 3 inch line is adequate for a supply line and that if we need to supply the attack engine “we’ll do the best we can”.
My thinking is that it is better to hook to the hydrant with 50 feet of 6 inch LDH and pump the 3 inch then try to supply an attack engine by pulling from 600 feet of 3 inch at 65-70 psi static pressure, less elevation. When I referenced the phase II report from Charleston, NC (regarding the inadequacy of 2 ½ inch supply lines), the response was the extra ½ inch (going from 2 1/2 inch to 3 inch) makes a huge difference. :-0
My intent is to request a test where we fill a draft tank for time and see the results using both methods, but as the very FNG I don’t want to get a rep for demanding huge changes that have very small improvements in performance.
Am I missing something here or is my thinking correct.