A: There should be a washer. If replacing that doesn't fix the leak, then the problem is probably in the brass seat located behind the washer. You could fix it yourself if you have the proper seating wrench, but it would probably be wisest to call a professional plumber with all the expertise, tools and parts he needs to come fix it once and for all.

To locate a reliable plumber, visit Home Advisor and submit a plumbing service request to be matched with the ideal service professional in your area.

-- Tips courtesy of HomeAdvisor.com