====== Plumbing System ======
A home's plumbing system includes the sewer, gas, and water systems.

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===== Water Supply Line =====
The water supply line is the home's water source. In remote homes, water is pumped from a well into the water supply line.

===== Water Heater =====
The water heater is a pressurized tank of heated water. Water is pumped into this tank from the water supply line.

The water header is the source for hot water pipes.

===== Water Return Line =====
The water return line is a large pipe connecting the home to a septic tank or city sewer.

===== Drain Lines =====
Drain lines carry water from appliances to the water return line.

===== Vent Stack =====
The vent stack is a vertical pipe that provides airflow to the plumbing system. It prevents pressure build-up.

===== Scale =====
Scale (Calcium Carbonate) is a compound commonly found in drinking water.

Scale build-ups can damage plumbing systems.

Different types of filters may be installed to remove calcium carbonate from water.