I have toured four different Thor Inds Factories in the past 6 years. Thor has never caulked the shower pan. Generally the shower pan is open to the inside of the coach is several places. Mine pan is in the the heater, electrical and water chase. It is accessible from the propane heater side and the bedroom side. I have never seen any water in the chase after the shower was used. It is the official Thor Plant 750 position that the gap between the shower sides and the pan should never be calked or sealed.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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