Need to seal/recaulk WH outside frame............
IF the heating chamber was leaking water inside rig then combustion gases would also becoming into rig plus water as combustion chamber runs thru the middle of tank surrounded by water in tank (that's how it transfer the heat to the water) OR water in tank would flood combustion chamber if there was a leak.
You need to seal up the WH frame...and probably seal around where the propane line comes thru. Wouldn't hurt to seal area around drain plug.
And stay with the OEM drain plug.....if Atwood use the nylon plug (aluminum tank/threads). If Suburban you need the anode rod which is art of the drain plug.
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31