Hi guys,
Was wanting put a small water tank under the tray of the MQ for washing hands, watering the dog etc. A few searches led me to the various PVC ones that people have made, so I came up with this. It's 150mm PVC, about 950 long and holds about 17L. To secure it in place I used U bolts, square ones around the tow bar into some unistrut, then round ones over the top, simple and very secure. Made a bracket to attach the tap to the trailer plug bracket on the tow bar.
Came out looking pretty neat. Apologies for the crappy iPhone pics.