Look for signs of mold growth or watermarks on walls and ceilings. In some instances, you will have the following:

• Drop in water pressure
• Knocking sounds inside walls

Usually, water is going to back out of the lowest fixture on the floor where that clog is. Sometimes, a camera snake inspection is necessary to determine if there are multiple clogs in a waste line system.

• Boilers heat the water to boil
• Water heaters heat the water to ready-to-use temperatures
• Furnaces take in air, heat it, and then distribute it throughout the house