Thompson Tank inc. offers ASME & DOT certified Vacuum tank manufacturing, Inspections & Repairs. we have The most experienced professionals in the vacuum tank industry. Thompson Tank inc. offers a variety of Tractor Trailers & truck mounted tanks built to DOT 407 & 412 specifications & rated for full vacuum. our new designs are rated up to 50 psi internal pressure and 15 psi external pressure (Full vacuum). We offer a variety of code and non-code vacuum tanks with all the equipment needed to get the job done safely and quickly. We offer our own unique line of vacuum tank components and standard parts. We also have our own unique line of piston pumps, which are considered the most durable and reliable vacuum - pressure pumps on the market.