Thx to Rick J for this 19 gallon water tank for my truck bed....more than doubles capacity of my 16 gal on-board tank. it is run off a 12V pump from northern hydraulics with a 10A/12V plug for the truck power point accessed thru the slider window. There is a 5/8 suction line to the tank bottom with a hose compatible fill line in the other 3/4 tank port. The vacant port can be used for venting when filling or pumping. Fill up in town and transfer to the trailer when back at camp........will shake it down at the track day at barber Motorsports park in birmingham 9/6....nothing like a shower after a 100 degree session in full leathers!!!!

Hi Phil
I got some 55 liter containers I use.I got old pump and might try your idea.