Boiler lock

This article covers the lock type. For the boiler lock in Emden, see boiler lock (Emden) .

Palm lock

A boiler lock is a special type of lock with at least two gates. In between is the lock basin. Its round shape gives the lock its name.

The boiler lock in Emden has four entrances and thus functions as an “elevator” between four different water levels.

See also

• Palm lock , Europe's oldest boiler lock
• Round lock at Agde , southern France