HELP: Suburban SW12DEL propane issue

Remember, you CANNOT compress Liquid(water), but you can compress air. You have a Dometic/Suburban WH. This type problem is rare on suburbans, but very common on Atwood WH. The Water Heater MUST have a slight air gap inside the tank. When the burner is heating, pressure in the tank builds up, but the air cushion absorbs it. NO AIR cushion and the Pop Off valve drips/seeps. It is very rare for a pop off valve to seep/weep is fairly new. Try this procedure. Doug

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 tank 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. To replace the air follow these steps:
Step 1: Turn off water heater
Step 2: Turn off incoming water supply
Step 3: Open the closest hot water faucet in the coach
Step 4: Pull handle of pressure-temperature relief valve straight out and allow water to flow until it stops.
Step 5: Allow pressure-temperature relief valve to snap shut, turn on water supply and close faucet