Single rolls of LDH require the firefighter to unroll it like throwing a bowling ball. All water served is boiled first, and customers aren't offered tap water. Depending on the capacity of the hydrant system being used, pumpers on the hydrant were quite common even in low flow house fire scenarios. Crews need to dig to the water main to fix a leak. With this combination of hose, the path of least resistance is the large outlet with the large hose.
As an example a hydrant has a psi static pressure but after flowing GPM the residual pressure is 40 psi.
Fire hydrant hookup keeps downtown café percolating
The static pressure is often thought of as the pressure that moves the water and this is incorrect. Post to Facebook. Let friends in your social network know what you are reading about. Not easy Very easy. The more you flow, the lower the pressure gets. Very common It does have its place These hookups made with a single LDH lines are not getting the full capacity of the hydrant.