The two systems should not be connected. Could the construction have shaken the pipes and knocked the rust loose? (Assuming that you have galvanized steel pipes) If that is the case, run the water until it is clear.
Turn the water heater off, and drain the tank and refill after you have cleared the pipes.
The odor of hydrogen sulfide gas can be detected in water at a very low level. Smell the water coming out of the hot and cold water faucets. Faucets have the odor.
From the hot water because more of the gas is vaporized. From your home for a few hours. Depending on the type of test.
Faucet the problem is likely to be in the water heater. Problems is likely to be sulfur bacteria in the well or distribution system. Gas in the groundwater.
Replace or remove the magnesium anode. Located on top of the water heater. Be sure to plug the hole.
Significantly decrease the life of the water heater. Anode made of a different material, such as aluminum, can be installed. The production of hydrogen sulfide gas.
With a chlorine bleach solution.
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