I know this is an old thread, but the smell is most likely coming from the anode rod in the hot water heater. This can happen to any water heater, be it RV or home, that has non treated well water in it. Bacteria grows on the anode rod and thus the smell. When we first moved into our current home, the hot water smell was so bad I considered moving. Had a water treatment guy come out and he pulled the anode rod from the hot water heater, smell gone, and has never returned. Of course we are sacrificing our elements, but small price to pay. If you drain your hot water heater by removing the anode rod, don't reinstall it until you are ready to use it again.
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2016 Georgetown 364TS
2017 Jeep Rubicon Recon toad
Nights Camped 2019 - 17
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