BANGOR, Maine — Umami Noodle Bar in downtown Bangor reopened Tuesday after a long, unexpected hiatus.

The restaurant was forced to close for 21 days after a 6-inch sewer line connecting the business to the city’s brick sewer main under Main Street collapsed. Getting shovels in the ground took longer than expected, but crews hired by the building’s owner finally repaired the broken connection Thursday night into Friday morning.

The city is responsible for the main brick line, which dates back to 1871, but not the connections that attach buildings and homes to those lines. Those are the responsibility of property owners.

The opening was delayed until this week because a plumber had to be brought in to reroute the sewer service of an upstairs apartment through the repaired line before the restaurant could reopen, Umami co-owner Jeremy Abbott has said.

At 11 a.m. Tuesday, the “open” sign finally flicked on for lunch.

In advance of the opening, supporters created a Facebook event calling on fans of the restaurant to dine at Umami early and often to help them recover from three lost weeks of business.

Follow Nick McCrea on Twitter at @nmccrea213.