Since the disaster is for I chose the ones that can be used in the reservoir water.  There have not tried that yet, but I could use generally good in the water directly. 
It was purchased separately because the hose for the water supply is short.  Tighten with a hose band is in these days? ?  In one touch parts it is also purchased separately. 
Water pressure, such as is the clean dirt in a sufficiently powerful state.