I have been building PFB this water truck for a while now. I built the tank and the spray bar, the pump is out of a coffee maker and the truck is driven by an R2 and TLT axles. We are not sure on wheels and tires yet but the one's on it will work for now. I had a chance to get it plumbed up for a test today.
Click here for a video.
Thanks for looking.
Travis