As your water heater heats up it builds pressure as the water expands and no where to go in a closed system as in your trailer. You need an air gap in the system to cure the problem. Shut any incomming water off to tt, open relief valve on wh and let water drain until stops, close relief valve and then turn water back on and you should be good to go. You probably have a weak seal at the toilet supply that is the weakest point when water pressure builds up. Hope this helps, Happy Campin...........Ron
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Ron
99 Freightliner FL70 Western Hauler CC 300 HP Cat/Chipped/ Allison Auto
12 Montana 3800RE/Level-Up Auto Leveling/Slide Toppers/MorRyde Hitch/VuQube 2000
01 F350 7.3 PSD Crew Cab DRW 4X4 6 Speed/Chipped
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