Installation Guide

The Discharge Pipe:

• Shall not be smaller in size than the outlet pipe size of the valve, or

have any reducing couplings or other restrictions.

• Shall not be plugged or blocked.

• Shall be of material listed for hot water distribution.

• Shall be installed so as to allow complete drainage of both the

temperature-pressure relief valve, and the discharge pipe.

• Shall pass through the structural ﬂ oor and terminate external to the

building. In cold climates, it is recommended that the discharge

pipe be terminated at an adequate drain inside the building.

• Shall not have any valve between the relief valve and tank.

The temperature-pressure relief valve must be manually operated

at least once a year. Caution should be taken to ensure that (1) no

one is in front of or around the outlet of the temperature-pressure

relief valve discharge line, and (2) the water manually discharged

will not cause any bodily injury or property damage because the

water may be extremely hot.

If after manually operating the valve, it fails to completely reset and

continues to release water, immediately close the cold water inlet

to the water heater, follow the draining instructions, and replace the

temperature-pressure relief valve with a new one.

FIGURE 25.

FILLING THE WATER HEATER

Never use this water heater unless it is completely full of water.

To prevent damage to the tank, the tank must be ﬁ lled with water.

Water must ﬂ ow from the hot water faucet before turning “ON” gas

to the water heater.

To ﬁ ll the water heater with water:

1. Close the water heater drain valve by turning the handle to the

right (clockwise). The drain valve is on the lower front of the water

heater.

2. Open the cold water supply valve to the water heater.

NOTE: The cold water supply valve must be left open when

the water heater is in use.

3. To ensure complete ﬁ lling of the tank, allow air to exit by opening

the nearest hot water faucet. Allow water to run until a constant

ﬂ ow is obtained. This will let air out of the water heater and the

piping.

4. Check all water piping and connections for leaks. Repair as

needed.