A simple but important point regarding our bridge-mount dry fire hydrant installations. Beside the swivel feature of our system's deployment, the strainer feature is probably the next most important component of the design. We use a teardrop-style 6-inch stream strainer made by ETT Fire out of Dadeville, Alabama. In our system, the strainer rests on the stream bed when deployed, so intake flow from the sides of the strainer is really important. When lift and elevation are low and a big-body pump is used, we are generally able to flow in excess of 1200 gpm using the strainer....which meets/exceeds our 1000 gpm design goal.
Strainer selection is very important in our bridge-mount DFH design.