All dispenser-sump entries should be fitted with what type of penetration fittings?

Dispenser-sump entries must be fitted with liquid-tight penetration fittings to ensure that any liquids, such as fuels or other hazardous materials, are contained within the sump area. This is crucial for maintaining environmental safety and compliance with regulations, as it prevents potential leaks or spills from escaping into the surrounding environment. Liquid-tight fittings create a reliable seal that safeguards against the infiltration of external contaminants and minimizes the risk of contamination, which is fundamental in preventing environmental damage and ensuring the safe operation of underground storage tank systems. The integrity of these fittings is vital in protecting against both liquid leakage and vapor escape, thereby contributing to a safer dispensing system.