comfort & safety for your home
Frequently Asked Questions About
How does a water heater work?
When a hot water tap is opened, normal water pressure
allows water movement. Cold water is pushed into the water heater via
the cold water inlet, through the dip tube to the bottom of the water
heater tank. This water movement pushes hot water out the hot water
output, through the hot water pipes, to the open tap. The cold water
that was introduced into the bottom of the tank cools the water. This temperature change causes the thermostat to initiate
heating of the water in the bottom of the tank. As the water is heated, it rises to
the top of the tank so that the hottest water is pushed out to the hot
water pipes first.
Why does a water heater have a dip tube?
What is an anode rod and what is it for?
Water heaters have a metal rod installed that sacrifices
itself to cathodically protect the tank from corrosion. It is made with
light metals such as aluminum or magnesium so that it deteriorates more
easily than the steel that makes up the tank. Without this protection,
the tank would deteriorate very quickly. Water heaters with longer
warrantees will generally have larger anode rods.
My water smells like rotten eggs. Is there anything I can
Water that contains high sulfate or mineral
concentrations combined with micro-organisms interacts with the anode
rod to produce hydrogen sulfide. Hydrogen sulfide is the source of the
odor. High sulfate concentrations are often caused by the presence of an
otherwise benign bacterium. Chlorination will destroy these bacteria,
and will minimize the problem. Follow this link for step-by-step
What fuels are used for heating water?
While most any fuel that creates heat will heat water,
three fuels are preferred for both commercial and residential water
heating: Natural gas, LP gas (Propane) or electricity are preferred
because of their availability & efficiency.
What is the Temperature & Pressure Relief Valve?
The Temperature & Pressure Relief Valve (commonly
known as the T&P Valve) is a safety device used on tank-type water
heaters. If the pressure inside the tank ever exceeds 150psi, the
T&P Valve relieves the pressure by allowing some water to be forced
out of the tank. The T&P Valve should be plumbed to a gravity drain
or drain pan.