Whistle Plumbing (Daly City): Welcome to Whistle Plumbing Daly City. We are a family owned and operated Plumbing Company out of Daly City, CA. Whistle Plumbing Daly City is a fully licensed and insured Plumbing Company with great reputation in the community. Whistle Plumbing Daly City has been in business since May, 2011 and look forward to many more great years, serving the community of Daly City, South San Francisco, Burlingame and surroundings. We service both Commercial and Residential.