5. Apply compressed air at a maximum regulated
pressure of 40 psig.
6. When draining is complete, remove the air
hose and fittings needed to connect the air
hose.
7. Close the domestic water drain valve on the
cold water inlet and open the isolation valve on
the hot water outlet.
Draining Inner Tank - Option 3
1. Connect the suction side of the pump to the
domestic water drain valve using a hose and/or
piping fittings.
2. Connect a hose to the discharge side of the
pump. Direct the hose to a proper drain or a
suitable place for drainage.
3. Open a hot water faucet at the highest point
above the water heater.
4. Open the domestic water drain valve and start
the pump to begin draining the inner tank.
5. When draining is complete stop the pump,
close the hot water faucet and close the domes-
tic drain valve. Remove the pump and all
hoses and fittings.
Draining Outer (Boiler Water) Tank
1. Disconnect snap set wiring connection at
water.
2. Close boiler water isolation valves between
boiler and water heater.
3. Connect hose to boiler water drain valve at
water heater. Open and drain water to a safe
place.
4. To speed draining procedure, loosen air vent
on top of tank.
5. When draining is complete, close drain valve
and retighten air vent.
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