When a pumper does not have a "high-flow" discharge and the plan is to supply an LDH hose line, then that plan needs to include manifolding or siamesing two or three smaller lines so that the higher flow can be achieved. This needs to happen even when one does not have the best appliance choice. At our recent seminar and drill in Oconee County, Carolina...the supply pumper at the dump site did not have a high-flow discharge and did not have a siamese but was asked to feed 1,000 gom to the attack pumper using a 5-inch supply line. Some quick thinking of a few folks got that 5-inch supply line up and running in little time....and without using a siamese.
The folks used a 2-1/2" x 2-1/2" x 5" gated wye, reversed ... and supplied that appliance using two short sections of 2-1/2" hose. While not the ideal appliance to use, it worked just fine and the pump was able to support the 1,000 gpm flow with no problem. Kudos to those folks for their quick thinking.