I am in the appliance business and I have been trying to figure out how I can make a portable washing machine testing device so I could go test washers I have at storage units without having a water hookup. I know nothing about engineering and understand I would need a tub of water, a pump, and it would drain back into the tub recycling the water thus allowing me to test washers. Can anyone help me on figuring out how to create such a device. I know nothing about engineering and getting an engineer's perspective on how I could create this is most important to me. Thanks.