Scale Jail
The Scale Jail is a diffuser built specifically for fire sprinkler technicians and contractors when servicing a sprinkler system. This diffuser will prevent erosion to grass and landscaping when draining a system, or conducting a 2" main drain flow test.
The inlet has a 2-1/2" NH/NST Female swivel so a standard fire hose can be connect to this for fire hydrant flushing as well. If conducting a standard 2" main drain test add a 2-1/2" NH male x 2" Female NPSH threaded adapter. Now connect a 2" NPSH fire hose from your 2" 45 degree discharge fitting to the bushing mentioned prior and you can safely discharge and diffuse the water flow.
