WaterLogic WL380 Troubleshooting Manual page 5

9. Hot Water Drip out of Faucet
Possible Reason
Small Outlet Vent Hole susceptible to scale
build up.
WL380 Manual
Descale Tank.
See Hot Tank Descaling Instructions that are included
further below in this Troubleshooting Section.
See instructional video on the Partner Area of the
Waterlogic.com website for more information.
All Waterlogic Hot Tanks have a built‐in Vent or
Expansion Chamber in the top of the tank except for
WL270 (GF) units.
The Vent Chamber allows for expansion of the water
when it is heated.
The chambers are separated by a welded‐in tank
baffle.
Water always flows into the bottom of the Hot Tank
and out the top to the Faucet.
The Hot Tank Outlet Tube has a Restrictor in its base.
This ensures the reservoir is always full by allowing
more water in than out.
There is a small hole in the side of the Hot Tank Outlet
Tube that allows air and water to pass into the Vent
Chamber as it is heated.
Water in the Vent Chamber is suctioned back through
the Outlet Tube vent hole when water is dispensed.
Expansion of water as it is heated in the Reservoir will
push the water out the faucet when the outlet tube
vent hole becomes plugged with debris or scale.
The small Outlet Vent Hole is susceptible to scale build
up and is a key indicator that descaling is required.
It is critical to descale the Hot Tank through the vent
line and outlet line on a regular basis to prevent this
problem.
Descaling through the inlet and/or outlet lines only
will not clean the vent chamber and outlet vent hole
properly.
Page 46 ‐ Revision: 2‐5‐2018
Solution