abandoned relics. actually they are used today in plenty, in new buildings. the city has the strict imfire codes in new york and the tanks service that requirement. . >> as outdated as they may seem, they are in fact anything but out of date. and for that matter, so is the company itself. >> we have a city of stone and masonry and glass and they really don't look like they belong. but it is a well-used product and probably new york's best secret. >> if you want to understand the secret of how the small family held business managed to outlast more than a dozen competitors for more than four generations, you need to start with their very simple philosophy. >> you don't try to throw out something that works, you just build upon it. >> first, he studied all the aspect of the core business by getting the five key licenses and certificates needed to operate the company. thanks to some heavy-handed