 Using hard suction hose in this manner requires that the fire engine be positioned carefully for the limited flexibility of the hose, and may require multiple firefighters due to the weight and bulk of the hose section.The use of flexible suction in this capacity is both ineffective and hazardous, as the hose and couplings may experience catastrophic failure.In certain circumstances, it may be possible to use hard suction hose to draft from a hydrant with adequate water supply but a low flow rate.