
Installation Requirements
Unvented SystemInstantaneous Water Heater
Pumped System
cold mains supply
cold mains supply
cold mains supply
Pumped System (with Essex flange)
cold mains supply
1m min.
Key:
1m min.
50mm
If less
than 1m
see note.
Isolating
Valve
Reducing
Valve
Shower
Valve
Pump
Essex
Flange