The Breitling Service Centre recommends that IF your watch is in regular contact with water, either by swimming or boating or what have you, it SHOULD have its gaskets replaced every one to two years. Hot water will VOID the warranty. It does NOT recommend showering with your watch for the same reasons I have noted elsewhere in this Blog. Hot tubs doubly so.
The service Interval is 4-6 years, and at time of Press is $760 Canadian Dollars, for an Automatic Chronograph.