Hilltop Tank Washout is the newest venture for Hills Stainless. Located in Sioux Falls, SD, Hilltop Tank Washout is a brand new, state-of-the-art facility designed to clean and sanitize the interior of 3A and food grade tank trailers. Utilizing Hills Stainless 50-plus years of experience, having knowledgeable staff, and providing the same excellent service, Hilltop Tank Washout is committed to giving the customer a clean and sanitized trailer ready to hit the road quickly. Hilltop Tank Washout has two bays dedicated to clean and sanitize the interior of edible liquid food trailers. Opening soon!