Hot Water Loop Plumbing Diagram. Common materials and components. This diagram illustrates how simple the heating system connected to a combi boiler is.
This return loop pipe connects into the bottom of the water heater. This is often necessary in larger installations with longer pipe runs. Schematics showing several residential plumbing layouts utilizing a hot water circulation pump.
They can be vertical or horizontal or both as shown in the diagram.
Zoning pump multi heater option water to water heat exchanger hot supply from pump on outdoor furnace this horizontal assembly must not exceed a height of 4 inches above top of water heater. When the flow of cooler water returns from the secondary circuit the hot primary water which jumped the gap between the two tees mixes with the return water. See figure 1 figure 1 the heater can also be anywhere. The hotter water instantly raises the returning waters temperature and protects the boiler from flue gas condensation and thermal shock.