Petroleum Containment manufactures the most watertight secondary containment sumps in the industry. We offer an extensive line of fiberglass UST tank sumps, dispenser sumps, and transition sumps, and penetration fittings. All of our UST piping sumps utilize a patented "Twist-Lok" access cover to ensure a watertight seal while providing quick and easy access. We also have a complete line of dispenser sumps for almost every make and model dispenser on the market.