Both the Dometic 310 and 320 have a seal which needs periodic cleaning to keep it from leaking. Once a year or so clean it to remove any "junk" on the bottom side. It pops out very easily and reinstall is also easy but you do have to take care to get it positioned in the groove properly.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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