How Does A Heating Tank Work?
If your house has a hydronic (forced hot water) heating system (boiler), water is heated in the boiler and then pumped to a baseboard, radiator, or some other means of heat distribution. The heated water expands when it is heated and without somewhere for it to go, the heated water will activate the pressure relief valve on the system, leaving a puddle on the floor. A hydronic expansion tank will prevent this from happening. As the heated water expands, the water will expand into the pre-pressurised hydronic tank until the water is cooled.