heating water on demand instead of keeping it stored, come with built-in thermal protection, or are installed within an open plumbing system. They don't usually need an expansion tank, but older ...

Water Heater Capacity: The more water you have to heat up, the greater the excess for your water heater expansion tank to handle. There’s no need to measure this on your own, though; simply read ...

An 'open-vented' heat-only system – the most common heat-only boiler system – requires a cold-water feed and expansion tanks in the loft. Heat-only boilers typically have components housed externally ...

A reader writes in to say he bought a water heater and expansion tank, after being told last year that was now required, and had them installed by someone who was not ...