PEX (cross-linked polyethylene) is a flexible, durable, and easy-to-install type of pipe that is becoming increasingly popular in residential plumbing. It is resistant to corrosion and freezing, and it can be used for both hot and cold water lines.

A trap is a U-shaped section of pipe that is installed below a drain. It collects and holds water, which creates a barrier that prevents sewer gases from entering the home through the drain.

As water is heated, it expands. The expansion tank provides a place for the expanding water to go, preventing it from causing damage to the water heater or the plumbing system.

The most common cause of a leaky faucet is a worn-out washer. Washers are small, round discs that create a seal between the faucet stem and the faucet body. Over time, washers can become worn or damaged, causing the faucet to leak.

The best way to unclog a drain is to use a drain snake. A drain snake is a long, flexible tool that can be inserted into the drain and used to break up and remove clogs.

A sump pump is a device that is installed in a basement or crawlspace to remove water that has accumulated due to flooding or groundwater seepage. Sump pumps are typically activated by a float switch, which turns the pump on when the water level reaches a certain point.

A water main is a pipe that carries water from a city's water supply to a home. A sewer line is a pipe that carries wastewater from a home to a city's sewer system.

A pressure reducing valve is a device that is installed on a water main to reduce the water pressure in a home. This can help to prevent damage to plumbing fixtures and appliances.

The best way to prevent frozen pipes is to insulate exposed pipes, keep the thermostat set at a constant temperature, and open the faucets slightly to allow water to drip. This will help to keep the pipes warm and prevent them from freezing.

A backflow preventer is a device that is installed on a water main to prevent water from flowing back into the water supply. This can help to prevent contamination of the water supply.

The best way to clean a shower head is to soak it in vinegar, scrub it with a toothbrush, and use a commercial shower head cleaner. This will help to remove mineral deposits and soap scum from the shower head.

A water softener is a device that is installed on a water main to remove minerals from water. This can help to prevent scale buildup in plumbing fixtures and appliances.

The best way to prevent a toilet from running is to replace the flapper valve, adjust the fill valve, and clean the overflow tube. This will help to ensure that the toilet is properly flushing and not leaking water.

A septic tank is a large underground tank that is used to treat wastewater from a home. The tank contains bacteria that break down the organic matter in the wastewater, converting it into a liquid that can be safely discharged into the environment.

The best way to maintain a plumbing system is to inspect the system regularly for leaks and damage, clean the drains and traps regularly, and flush the water heater regularly. This will help to prevent problems and keep the system running smoothly.