An emergency plumber can repair clogged drains by using several techniques, including:

Snaking: This involves using a long, flexible cable, called a snake, to break up and remove blockages in the pipe. The snake is inserted into the pipe and pushed through the clog, breaking it up and allowing water to flow freely again.

Hydro jetting: This involves using high-pressure water to blast away blockages. A hydro jetting machine uses pressurized water to clean out the inside of the pipes, removing built-up grease, grime, and other debris that can cause clogs.

Augering: This is a technique that uses a long, coiled cable to break up and remove blockages. The auger is inserted into the pipe and then turned to break up the clog.

Chemical Drain Cleaners: Emergency plumber can also use chemical drain cleaners to try to dissolve the clog. This is a quick solution, but it may not be effective for all types of clogs and can be harmful to the pipes if not used carefully.

Manual Removal: In some cases, the clog may be close enough to the opening of the drain for the plumber to remove it manually, using tools such as pliers or a drain claw.

It’s worth noting that the most appropriate method to use will depend on the specific nature of the clog and the condition of the pipes. An experienced plumber will be able to assess the situation and determine the best course of action.

It’s also important to take preventative measures to avoid clogs such as not disposing grease, food particles and other non-biodegradable materials down the drain, using a hair catcher in the shower and keeping an eye on slow draining areas.