Set Appliance State:

Mains Power Off
Gas Off
Selector Switch in HOT WATER position
Gas On; Pilot On
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Observation:

Extinguish the Pilot by turning the Gas Control Knob approx 1/12 of a turn Clockwise. This will cause the Gas Valve to snap shut. After a short period a click should be heard as the mag valve closes.