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A - Expansion tank. This prevents the pressure increase due to heating water, from damaging the plumbing. The tank is filled with air, that is separated from the water by a bladder. When the water expands due to heating, water compresses the air absorbing the pressure. B - Check valve (or back flow valve). This is designed to only allow water to flow in ...


3

The white pipe at the top left appears to have a thermostatic mixer valve. That's the output side of the water heater. To avoid running out of hot water too quickly, the tank is set to a somewhat higher temperature than is actually desired, and this valve mixes that with cold water to get the actual temperature and sends that to the rest of the house. The ...


1

Based on the International Residential code (which may or may not apply where you live), this installation is not compliant. Things that I see that need to be corrected include (but may not be limited to): The vent must be held at least one inch away from wood and other combustibles. The total rise of the vent must be at least five feet, to insure proper ...


1

20 years old, it's almost certainly time for a new one unless it's of very unusual construction - like stainless steel. If water: overflows from the top of the pipe onto the floor Then the overflow pipe is not correctly routed - it should go DIRECTLY down to the floor. I can see it going sideways in the picture on your other question. It also appears ...


1

In order to use propane, the appliance needs to be converted, and you will need a regulator: By default, most gas-fueled appliances are sold configured for natural gas (methane) and NOT propane. Because of the chemical differences, propane requires a different ratio of fuel to air in order to burn properly. This is accomplished by changing the fuel nozzle ...



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