Hot water demand systems are specialized circulating systems for use when there is not already a hot water return line. They are systems designed to pump your hot water from your water heater to your fixtures fast without running water down the drain.

 

Your cold water line connects to the inlet of the water heater. Your hot water line connects to the outlet of the water heater.  So if you connect a pump between your hot and cold water lines you can pump the water in a big circle.

 

From the Manufacturer
Bosch AquaStar Model 1600P is the right size for most homes and is the ideal household water heater. While it provides endless hot water, it saves you money because it only operates when you use hot water. This tankless water heater also saves valuable floor space as it mounts right on the wall.

Bosch, 1 Major Appliance Or Shower At A Time, Natural Gas Tankless Water Heater, 117,000 BTU Input Delivers 3.3 Gallons Per Minute At A 55 Degree Fahrenheit Rise, (more…)

From the Manufacturer
PowerStar point-of-use tankless water heaters are designed to provide an endless supply of hot water for kitchen, bathroom and hand-washing sinks. There are four under-sink models to choose from (dependent on desired temperature rise and flow rates). Common applications include: homes, offices, warehouses, service stations, stores and concession stands.

Includes AE12 Point-of-Use Electric Tankless Water Heater - AE12

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The benefits of hot water recirculation are rather obvious. You get nearly instant hot water which is convenient, and you save a substantial amount of water. But there are a few other issues to consider.

There are a number of types of recirculation systems for residential plumbing. There are the traditional full-time circulating systems that continuously pump a small flow of hot water through the piping from the heater to the fixtures and back to the inlet of the heater.

Hot water recirculation pumps are wasteful of energy

Natural Gas Pilot Assembly, Works On The Following Water Heater Model #’s: 6-40-Yors, 6-40-Yors-d, 6-50-Yort-d, Temperature Setting 170&degree., Please Make Sure To Use The Corresponding Pilot Assembly To The Water Heater, Refer To The Tag On The Original Pilot Assembly To Match With The New Pilot Assembly.

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