with reduced volume of the first chamber, and in the case of pressure relief of the second chamber, the enveloping wall moves back, under the restoring force, into the normal position, in which the valve is closed, and in doing so sucks water out of the storage tank into the first chamb...
Some equipment may have only a pressure relief valve with no temperature sensor. On a water pressure tank that's fine, but on water heaters and steam or hot water heating boilers such an installation is not safe and may not comply with building codes. This guide to relief valve inspection,...
with reduced volume of the first chamber, and in the case of pressure relief of the second chamber, the enveloping wall moves back, under the restoring force, into the normal position, in which the valve is closed, and in doing so sucks water out of the storage tank into the first chamb...
at a gas or oil fired water heater, if on inspection you find that the bottom of the heater tank is leaking and dripping into the combustion chamber then the water heater is shot. If you hear a hissing sound at an electric water heater that may be a normal effect of water being heat...