Two-pipe system (reverse return)

Heating · Distribution Systems · printed page 150 (PDF page 151)

Book index entries

Hot Water – with Two Pipe System (Reverse Return)Hydronic Heating – Two Pipe System – Reverse Return Two Pipe System (Reverse Return) for Hot Water Heating

Text in the illustration

radiator
supply pipe
return pipe
expansion tank
cool water
boiler
cross section

Generated explanation

A building cross section shows a boiler below two radiators connected by a two-pipe reverse-return hydronic heating system. Red supply piping carries heated water from the boiler to each radiator in parallel, while blue return piping collects the cooled water. The return from the radiator nearest the boiler travels toward the farther radiator before looping back to the boiler, illustrating the reverse-return arrangement. Arrows indicate circulation through the supply branches, radiators, and common return piping. An expansion tank is connected to the piping near the boiler.

Components

boiler radiators supply piping return piping expansion tank circulator pump piping valves pipe fittings

Related illustrations

0878

Two-pipe system (direct return)

· p. 150

A building cross section shows a two-pipe, direct-return hydronic heating system with a boiler below two radiators. Red supply piping carries hot water from the boiler to each radiator, while blue return piping carries c