Installing an energy star water heater

An energy star water heater is the best choice not only because it offers tax incentives, but it also reduces water heating bills by around 50%. Here is how the water lines are connected from the water main to the water heater. Then the hot water line goes back into the home plumbing manifold where each water line is connected to its own fixture.

Water heaters will have an inlet water line that's bigger than the lines going to fixtures and appliances. The water line that comes from the main water source or the manifold will be a 3/4-inch pex tube.

The hot outlet that goes back to the manifold or the copper hot line will also be a 3/4-inch line.This will help make sure that there is an adequate supply of water for all the hot and cold lines to service every fixture in the house.


Relief valves on water heaters need to made of copper or galvanized pipe because of the potential of overheating.

If this happens the the relief valve will release hot water and steam through a pipe system that usually diverts away from livable spaces. Many relief valve lines run under the floor or into the crawl space. This is a code in all 50 states to have a relief valve and copper pipe running away from the home's inhabitants.

pex plumbing diagram



Pex tubing is a lot easier to install than copper pipes. There are still a few areas that don't allow plastic hot and cold water lines, but for the most part, they are accepted and used with success. Pex costs must less than copper and it is very easy to install.


A water manifold will run a 3/4-inch cold pex tubing line into the water heater. The water heater will have a 3/4-inch outlet hot pex tubing line that goes back into one side of the manifold to service all hot water fixtures.

Cool huh!

With a Pex system, every fixture will have its own supply line. Sometimes it seems like a lot of tubes running under the floor, but it really is a better system.

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