Jayco Greyhawk Owner's Manual page 105

4. Close off drain valve as well as pressure temperature relief valve.
5. After this procedure, there will be approximately two quarts of water left at the bottom of
inner tank. Should this water freeze, it will not cause any damage to the tank.
NOTE: Two or three times a year flush out tank. This may prolong the life of your tank
and allow use of a full 6 gallons of hot water.
PRESSURE-TEMPERATURE RELIEF VALVE
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WARNING: Do not plug pressure-temperature relief valve.
Weeping or dripping of a pressure-temperature relief valve while the water heater is running DOES
NOT mean it is defective.
This is normal expansion of water as it is heated in the closed water system of a recreation vehicle.
The Atwood water heater is designed with an internal air gap at the top of the tank to reduce the
possibility of weeping and dripping. In time, the expanding water will absorb this air.
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CAUTION: Turn off water heater before opening pressure-temperature relief valve.
TO REPLACE THE AIR GAP FOLLOW THESE STEPS:
1. Turn off the water heater.
2. Turn off the incoming water supply.
3. Open a hot water faucet in the motorhome.
4. Pull the handle of the pressure-temperature relief valve (Fig. 6-4)
straight out and allow water to flow until it stops.
5. Allow the pressure-temperature relief valve to snap shut; close the
hot water faucet; and turn on the water supply.
• At least once a year, manually operate the pressure-temperature
relief valve.
Care and Maintenance
Fig. 6-4
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