The pump has a flow detector built in, which automatically shuts it off once the water stops flowing. Milwaukee stresses in diagrams for this tool that it's only intended to be used with clean water.

while the T20-S pumps up to 185 gpm and can handle particulates up to 1 in. CW20 2-in. clean water pump has a 208cc engine with low-oil shutdown and displaces up to 158 gpm, and the 16.5-lb.

The pump has a flow detector built in, which automatically shuts it off once the water stops flowing. Milwaukee stresses in diagrams for this tool that it's only intended to be used with clean water.