This Simple DIY Project Makes Your RV Life Easier! Using plastic ammo cans attached to my RV bumper has been a fantastic way to store all my sewer elbows, caps, gloves, and other accessories to keep them readily available when its time to dump my RV wastewater tanks. This process will vary slightly from rig to rig - but essentially we’re drilling holes into the bottom of these ammo boxes and securing them around the bumper with U-bolts. On a typical day when I'm dumping my tanks or hooking up at