As I mentioned in last week's blog post, expansion tanks are required when water in a home can't expand back into the water main. This might be caused by a check valve, a backflow preventer, or a ...

Why does the water heater in my new house have another small tank hanging off the side of the pipe above it? That is an expansion tank installed on the water supply pipe to the water heater. Its ...

If the required cold fill pressure is higher than 12 psig, there is an important step that must be taken if a pre-charged expansion tank is being used. The air charge in the tank must be adjusted to ...