A homeowner in South Miami-Dade allowed men to walk into the bathroom of the master bedroom to loosen a pipe under a sink and let the water run. And to speed up the damage, the men also used a garden hose. When water wasn’t involved, flames were. In another incident, a man set a car on fire in a garage, police said. He watched the flames spread to the house. And they collected about $600,000, police said. Authorities said last year a group of fraudsters filed $7.6 million in false claims, after staging 13 fires and 5 floods.