Guardian Plumbing covers it if it lets water into or out of your house. Plumbers are experts in anything that transfers gas or water in structures. Therefore, we can assist you whether you have a blocked sink, a leaky faucet, or you think your main drain may be leaking. You could not be liable for the repair if there is a leak in an outside gas or water line, but a plumber may still assist you in diagnosing the issue and taking action to protect your safety.