Water system on the truck

We get in alot of different situations in the truck & heavy equipment trade.One thing granddad taught me is to always keep some water on hand.It's good for man and machine.We Installed a 10 gallon water cooler on the Kenworth wrecker with a 5 gallon per minute demand 12 volt electric pump and 20 feet of 5/8 inch garden hose.Comes in handy when we need it to fill a radiator,put out a small fire ,or quench my thirst.