A thermocouple is a sensor that measures temperature. When the temperature inside the water heater drops below the set temperature, the thermostat triggers the gas flow to the main burner. In order for the gas valve to open, however, the thermocouple must signal that the pilot light is burning and hot enough to ignite the gas. If your tank is less than 6 years old and is not leaking, but is still not working, this is an indicator that you need your thermocouple replaced. Some additional indicators are:
- You can’t light the pilot light at all
- The pilot light won’t stay lit
- The main burner won’t stay lit
Hot water recirculation pumps are a convenient way to ensure that you have immediate hot water from the tap. These systems slowly pump hot water through your hot water pipes and back to the water heater through either a dedicated line or through the cold water line. Recirculation pumps are suggested for large homes, homes with tankless water heaters, and those who don't like waiting for the shower to warm up.
A water pressure regulator is a valve that reduces the water pressure coming from the main water line into the house. This valve brings down the pressure to a safe level before the water reaches any plumbing fixtures inside the home. The pressure regulator is the most important piece of your plumbing because it effects all your other appliances and reduces the the negative effects of high pressure on your plumbing system.
THERMAL EXPANSION TANK:
Thermal expansion tanks promote pressure relief for your water heater. As water heats, it expands, and without a way for the pressure to be alleviated, your water heater has to absorb the expansion and this affects the entire home's water pressure. Thermal expansion tanks are typically only necessary for larger tanks