Overflow pipe

Heating · Distribution Systems · printed page 151 (PDF page 152)

Book index entries

Expansion Tank – Overflow Pipes for Hot Water Heating Systems Hot Water – Expansion Tank – Overflow Pipe Hydronic Heating – Expansion Tank – Overflow Pipe Overflow Pipe for Expansion Tanks on Hot Water Heating Systems

Text in the illustration

overflow pipe
expansion tank
sight glass
radiator
boiler
manual water make-up may be next to expansion tank or in basement
cross section
water make-up valve
discharge near floor drain
option 2
vent
option 3

Generated explanation

A building cross section shows a hot-water heating system with a basement boiler, an upper-floor radiator, and an elevated expansion tank with a sight glass. Red supply piping and blue return piping connect the boiler and radiator, with arrows indicating circulation direction. The left-hand expansion tank has an overflow pipe extending above the roof, and a note identifies manual water make-up locations next to the expansion tank or in the basement. Option 2 routes the tank's top overflow connection down to discharge near a floor drain. Option 3 shows a separate top vent and an internal overflow standpipe descending to discharge near a floor drain; both alternatives include a sight glass and a water make-up valve.

Components

boiler radiator expansion tank sight glass overflow pipe vent pipe water make-up valve hot-water supply piping return piping

Materials

metal glass

Related illustrations

0874

Open hydronic system

· p. 149

A building cross section shows an open hydronic heating system with a boiler in the basement and two radiators above. Red supply piping and blue return piping, with directional arrows, illustrate hot water flowing to the