This week I procured some of the larger pieces for my housebus: the water holding tanks! I’ve had it in mind to use 55 gallon plastic drums for this since pretty early on in the project for a number of reasons. Years ago, I’d used one of these ubiquitous blue barrels for rainwater collection in our garden, and I found it surprisingly easy to work with. The plastic cuts easily with a simple jigsaw and drill, and metal fittings can be threaded directly into the thick walls of the drum with no additional fittings or sealants. The drums are fairly easy to source and are often food-safe.