Circulating pump
Drain cock at lowest point
Back
boiler
Central heating return
Central heating flow
Drain cock
Domestic hot water draw off
Overflow
Overflow
Cold water tank
Indirect hot water cylinder
Minimum return thermostat
Gravity return 28 mm
Gravity flow 28 mm
Gravity radiator
Feed and expansion tank
Open vent 22 mm
Open vent 22 mm
8
Circulating pump
Drain cock at lowest point
Back
boiler
Central heating return
Central heating flow
Drain cock
Domestic hot water draw off
Overflow
Overflow
Cold water
tank
Indirect hot water cylinder
Minimum return thermostat
Gravity return 28 mm
Gravity flow 28 mm
Gravity radiator
Feed and expansion tank
Open vent 22 mm
Open vent 22 mm
Injector tee
TYPICAl SCHEMATICS