Remove the boiler drain at the bottom of the water heater,and install a tee with the branch facing up. Replace the boiler drain! Above the tee is where you put the approved for pottable water pump,with the arrow pointing toward the tee.(you can put a shut off above and below the pump for servicing)From the top of the pump you now run a line to the farthest fixture,of a conventional water line system, and tee into the hot before any shutoff or fixture.(insulating the hot water lines would definitely save energy)If you are trying this on a home run (or header)system, you will have to run a separate line back from every fixture to an other header,and then to the top of the pump. P.S. Be sure you label the shut offs to make sure no one closes them when the pump is in operation.
Recirculate
yes any pipe will
Hot? Cold? return? fire suppression ? Non Potable?
Repairing the section of pipe that is leaking will stop a leak on a hot water line.
The pump that moves hot water through a hot water heater is the recirculation pump. This pump moves the water through the heater and back through the intake line.
Auto recirculation valve is used to ensure a minimum flow is maintained through the pump all the time. Recirculation valves are mostly combined with Non Return Valves in the main flow pipe , when flow is established through the discharge line which means that the NRV is open , recirculation valve is closed through a mechanical linkage between the NRV and recirculation valve . Usually the recirculation valves develops passing through it after a period of time due to wear out in the contact points between the NRV and recirculation linkages.
Recirculates hot water, either potable or for heating.
I assume you mean the ice build up in some freezers? its because some freezers have whats called a hot gass system or defrost installed in them. A hot gas system is... while the freezer is in its off cycle the controller will open up a valve (usually solinoid valve) in the hot gas pipe/line. this line goes from the discharge line to the suction line usually. There are all different hot gas pipe runs, im going the most common so it is less confusing. There for shuting off the valve in the discharge line (the pipe that leaves the compressor) all warm/hot mass will always move toward a cooler/cold mass. since the suction pipe (bigger pipe entering the compressor) is cold the hot refrigerant will move through the hot gas line (defrosting the refrigerated space) to the suction pipe. usually there is some type of component added further down the suction line to save the compressor from and condensed refrigerant entering the compressor.... hope this helped
That's just how long it takes to get the water that is sitting in the pipe out. Unless you have a circulating pump on the line so that there is always hot water at the faucet, it always takes a bit of time for the water to get hot. The hot water is in the tank, not the pipe connecting it to the faucet. There is nothing in the pipe to keep the water hot.
Hot applied coal tar enamel with 15# felt bitumen
Attach an auto air vent at the highest point on the line
A hot gas discharge line is a pipe or conduit through which hot gases are expelled or released, typically from a heating system, engine, or industrial process. This line helps to transport the hot gases away from the source to prevent heat buildup and potential hazards.