Heatrae Sadia B3M Fitting Instructions And User Manual page 13

5.4 IMPORTANT NOTES TO USERS OF OPEN OUTLET INSTALLATIONS
When installed as an Open Outlet water heater the outlet acts as a vent
and must not be connected to any form of tap or fitting not recomended by
Heatrae Sadia.
The outlet of the tap must not be restricted or blocked in any way.
In an Open Outlet installation it is normal for the hot outlet to drip during
heating. This is due to the expansion of water as it is heated within the unit,
it does not indicate a fault with the unit.
DO NOT attempt to stop this dripping by over-tightening the inlet tap as
damage to the sealing washers or the operating mechanism will occur.
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