HUNTINGTON STATION, N.Y. — A faulty water heater flue pipe caused the carbon monoxide leak that killed a New York restaurant manager and sent more than two dozen people to hospitals, a fire official said Sunday.
Terence McNally, the chief fire marshal of Huntington Station, said the fumes were circulated in the basement by the ventilation systems at the Legal Sea Foods restaurant at the Walt Whitman Shops on Long Island.
Restaurant manager Steven Nelson was found unresponsive in the basement on Saturday night and pronounced dead at a hospital.
Roger Berkowitz, president of Massachusetts-based Legal Sea Foods, said Nelson, 55, of Copiague, had worked for the restaurant for three years and had two sons.
‘‘It’s a shock; he was a great guy; we consider ourselves a family,’’ Berkowitz said, adding that other employees were ‘‘traumatized.’’
Berkowitz said that the carbon monoxide leak was ‘‘a wake-up call for commercial businesses’’ and that monitors should be in all businesses.
Authorities initially went to the restaurant after receiving a call about a woman who had fallen and hit her head in the basement.
Rescue workers who arrived at the scene started to feel lightheaded and nauseated and suspected a carbon monoxide leak, officials said.
The restaurant was evacuated and 27 people were treated at hospitals. All of those affected by the fumes were restaurant employees, police, or ambulance workers.
The building was not required to have carbon monoxide detectors, and there were none, McNally said.
Carbon monoxide is odorless and colorless and can lead to death by suffocation.
Police said a coroner would officially determine Nelson’s cause of death. Autopsy information was not immediately available Sunday.
No problems had been found when the restaurant was inspected last March, and another inspection was scheduled for next month, McNally said.
The Walt Whitman Shops, about 35 miles east of New York City, has more than 80 stores, including Bloomingdale’s, Lord & Taylor, Macy’s, and Saks Fifth Avenue.
The restaurant is in a separate structure from the main group of stores, in a block with The Cheesecake Factory and Panera Bread. Both restaurants were evacuated as a precaution, and The Cheesecake Factory was open on Sunday.
Gas lines to Panera Bread and Legal Sea Foods had been shut off, McNally said, with Panera likely to get gas back Monday morning.
Legal Sea Foods, which was issued a citation for violating town ordinances by having defective equipment, will have to show officials that the water heaters have been repaired before it can reopen, he said.
In Maine, 21 people were affected by carbon monoxide at an Ogunquit resort on Sunday, but none suffered serious injuries, officials said. Nine ambulances were sent to the InnSeason Resorts-The Falls at Ogunquit on Route 1 and one of the hotel’s buildings was evacuated.