We also offer a complete line of drop-in liners to replace leaking rubber lined tanks or to extend the life of metal tanks. Tenn-Plast uses only state of the art Wegener plastic welding equipment. Our butt-welders, benders, and extrusion welders are the most advanced equipment available on the market today. Tenn-Plast has a complete fiberglass shop that is capable of fabricating all types of custom fiberglass tanks. We also offer field repair for your existing fiberglass tanks.