Encouraged by the post about treating spiders on boats, I went to Home Depot for a $14 gallon jug of "Ortho Home Defense". It comes with a hose that slips into the jug's nozzle. On the pump handle, you swing open the spray wand to use. I was thinking, this little battery powered pump should find other uses on the boat. Might suck the ATF out of the transmission, but I think it's a bit small for motor oils. Drain the ice box or bilge or dinghy. Spray people with water as a cooling mist. What else?